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Part 1 of KSE-III

Browse Source 
The ability to schedule multiple threads per process
(one one cpu) by making ALL system calls optionally asynchronous.
to come: ia64 and power-pc patches, patches for gdb, test program (in tools)

Reviewed by:	Almost everyone who counts
	(at various times, peter, jhb, matt, alfred, mini, bernd,
	and a cast of thousands)

	NOTE: this is still Beta code, and contains lots of debugging stuff.
	expect slight instability in signals..
This commit is contained in:
Julian Elischer 2002-06-29 17:26:22 +00:00
parent cc5dcb202c
commit e602ba25fd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=99072
75 changed files with 2769 additions and 735 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
lib/libkvm/kvm_proc.c
View File

@ -325,11 +325,28 @@ kvm_proclist(kd, what, arg, p, bp, maxcnt)
kp->ki_estcpu = proc.p_ksegrp.kg_estcpu; /* XXXKSE */
kp->ki_slptime = proc.p_kse.ke_slptime; /* XXXKSE */
kp->ki_swtime = proc.p_swtime;
kp->ki_flag = proc.p_flag;
kp->ki_flag = proc.p_flag; /* WILDLY INNACURATE XXXKSE */
kp->ki_sflag = proc.p_sflag;
kp->ki_wchan = mainthread.td_wchan; /* XXXKSE */
kp->ki_traceflag = proc.p_traceflag;
kp->ki_stat = proc.p_stat;
if (proc.p_state == PRS_NORMAL) { /* XXXKSE very aproximate */
if ((mainthread.td_state == TDS_RUNQ) ||
(mainthread.td_state == TDS_RUNNING)) {
kp->ki_stat = SRUN;
} else if (mainthread.td_state == TDS_SLP) {
kp->ki_stat = SSLEEP;
} else if (P_SHOULDSTOP(&proc)) {
kp->ki_stat = SSTOP;
} else if (mainthread.td_state == TDS_MTX) {
kp->ki_stat = SMTX;
} else {
kp->ki_stat = SWAIT;
}
} else if (proc.p_state == PRS_ZOMBIE) {
kp->ki_stat = SZOMB;
} else {
kp->ki_stat = SIDL;
}
kp->ki_pri.pri_class = proc.p_ksegrp.kg_pri_class; /* XXXKSE */
kp->ki_pri.pri_user = proc.p_ksegrp.kg_user_pri; /* XXXKSE */
kp->ki_pri.pri_level = mainthread.td_priority; /* XXXKSE */

2
sys/alpha/alpha/genassym.c
View File

@ -80,6 +80,8 @@ ASSYM(MTX_UNOWNED, MTX_UNOWNED);
ASSYM(TD_PCB, offsetof(struct thread, td_pcb));
ASSYM(TD_KSE, offsetof(struct thread, td_kse));
ASSYM(TD_PROC, offsetof(struct thread, td_proc));
ASSYM(TD_STATE, offsetof(struct thread, td_state));
ASSYM(TDS_RUNNING, TDS_RUNNING);
ASSYM(KE_FLAGS, offsetof(struct kse, ke_flags));

21
sys/alpha/alpha/pmap.c
View File

@ -1151,7 +1151,12 @@ pmap_dispose_thread(td)
ksobj = td->td_kstack_obj;
ks = td->td_kstack;
ptek = vtopte(ks);
#ifdef KSTACK_GUARD
ks -= PAGE_SIZE;
for (i = 1; i < (KSTACK_PAGES + 1); i++) {
#else
for (i = 0; i < KSTACK_PAGES; i++) {
#endif
m = vm_page_lookup(ksobj, i);
if (m == NULL)
panic("pmap_dispose_thread: kstack already missing?");
@ -1164,14 +1169,16 @@ pmap_dispose_thread(td)
}
/*
* If the thread got swapped out some of its KSTACK might have gotten
* swapped. Just get rid of the object to clean up the swap use
* proactively. NOTE! might block waiting for paging I/O to complete.
* Free the space that this stack was mapped to in the kernel
* address map.
*/
if (ksobj->type == OBJT_SWAP) {
td->td_kstack_obj = NULL;
vm_object_deallocate(ksobj);
}
#ifdef KSTACK_GUARD
kmem_free(kernel_map, ks, (KSTACK_PAGES + 1) * PAGE_SIZE);
#else
kmem_free(kernel_map, ks, KSTACK_PAGES * PAGE_SIZE);
#endif
td->td_kstack_obj = NULL;
vm_object_deallocate(ksobj);
}
/*

3
sys/alpha/alpha/swtch.s
View File

@ -127,6 +127,9 @@ Lcs1: LDGP(pv)
mov v0, s2 /* s2 = new thread */
ldq s3, TD_MD_PCBPADDR(s2) /* s3 = new pcbpaddr */
ldiq t0, TDS_RUNNING
stl t0, TD_STATE(s2)
/*
* Check to see if we're switching to ourself. If we are,
* don't bother loading the new context.

28
sys/alpha/alpha/trap.c
View File

@ -39,6 +39,7 @@
#include <sys/sysproto.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/kse.h>
#include <sys/exec.h>
#include <sys/lock.h>
#include <sys/mutex.h>
@ -299,6 +300,12 @@ trap(a0, a1, a2, entry, framep)
td->td_frame = framep;
if (td->td_ucred != p->p_ucred)
cred_update_thread(td);
if ((p->p_flag & P_WEXIT) && (p->p_singlethread != td)) {
mtx_lock_spin(&sched_lock);
PROC_LOCK(p);
thread_exit();
/* NOTREACHED */
}
} else {
sticks = 0; /* XXX bogus -Wuninitialized warning */
KASSERT(cold || td->td_ucred != NULL,
@ -659,6 +666,23 @@ syscall(code, framep)
sticks = td->td_kse->ke_sticks;
if (td->td_ucred != p->p_ucred)
cred_update_thread(td);
if (p->p_flag & P_KSES) {
/*
* If we are doing a syscall in a KSE environment,
* note where our mailbox is. There is always the
* possibility that we could do this lazily (in sleep()),
* but for now do it every time.
*/
td->td_mailbox = (void *)fuword((caddr_t)td->td_kse->ke_mailbox
+ offsetof(struct kse_mailbox, kmbx_current_thread));
if ((td->td_mailbox == NULL) ||
(td->td_mailbox == (void *)-1)) {
td->td_mailbox = NULL; /* single thread it.. */
td->td_flags &= ~TDF_UNBOUND;
} else {
td->td_flags |= TDF_UNBOUND;
}
}
#ifdef DIAGNOSTIC
alpha_fpstate_check(td);
@ -756,14 +780,14 @@ syscall(code, framep)
break;
}
userret(td, framep, sticks);
/*
* Release Giant if we had to get it.
*/
if ((callp->sy_narg & SYF_MPSAFE) == 0)
mtx_unlock(&Giant);
userret(td, framep, sticks);
#ifdef KTRACE
if (KTRPOINT(td, KTR_SYSRET))
ktrsysret(code, error, td->td_retval[0]);

138
sys/alpha/alpha/vm_machdep.c
View File

@ -240,8 +240,7 @@ cpu_set_fork_handler(td, func, arg)
* from proc0.
*/
void
cpu_exit(td)
register struct thread *td;
cpu_exit(struct thread *td)
{
alpha_fpstate_drop(td);
@ -253,6 +252,141 @@ cpu_sched_exit(td)
{
}
void
cpu_thread_exit(struct thread *td)
{
return;
}
void
cpu_thread_setup(struct thread *td)
{
td->td_pcb =
(struct pcb *)(td->td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
td->td_frame = (struct trapframe *)((caddr_t)td->td_pcb) - 1;
}
struct md_store {
struct pcb mds_pcb;
struct trapframe mds_frame;
};
void
cpu_save_upcall(struct thread *td, struct kse *newkse)
{
newkse->ke_mdstorage = malloc(sizeof(struct md_store), M_TEMP,
M_WAITOK);
/* Note: use of M_WAITOK means it won't fail. */
/* set up shortcuts in MI section */
newkse->ke_pcb =
&(((struct md_store *)(newkse->ke_mdstorage))->mds_pcb);
newkse->ke_frame =
&(((struct md_store *)(newkse->ke_mdstorage))->mds_frame);
/* Copy the upcall pcb. Kernel mode & fp regs are here. */
/* XXXKSE this may be un-needed */
bcopy(td->td_pcb, newkse->ke_pcb, sizeof(struct pcb));
/* This copies most of the user mode register values. */
bcopy(td->td_frame, newkse->ke_frame, sizeof(struct trapframe));
}
void
cpu_set_upcall(struct thread *td, void *pcb)
{
struct pcb *pcb2;
td->td_flags |= TDF_UPCALLING;
/* Point the pcb to the top of the stack. */
pcb2 = td->td_pcb;
/*
* Copy the upcall pcb. This loads kernel regs.
* Those not loaded individually below get their default
* values here.
*
* XXXKSE It might be a good idea to simply skip this as
* the values of the other registers may be unimportant.
* This would remove any requirement for knowing the KSE
* at this time (see the matching comment below for
* more analysis) (need a good safe default).
*/
bcopy(pcb, pcb2, sizeof(*pcb2));
/*
* Create a new fresh stack for the new thread.
* Don't forget to set this stack value into whatever supplies
* the address for the fault handlers.
* The contexts are filled in at the time we actually DO the
* upcall as only then do we know which KSE we got.
*/
td->td_frame = (struct trapframe *)((caddr_t)pcb2) - 1;
/*
* Arrange for continuation at fork_return(), which
* will return to exception_return(). Note that the child
* process doesn't stay in the kernel for long!
*/
pcb2->pcb_hw.apcb_ksp = (u_int64_t)td->td_frame;
pcb2->pcb_context[0] = (u_int64_t)fork_return; /* s0: a0 */
pcb2->pcb_context[1] = (u_int64_t)exception_return; /* s1: ra */
pcb2->pcb_context[2] = (u_long)td; /* s2: a1 */
pcb2->pcb_context[7] = (u_int64_t)fork_trampoline; /* ra: magic*/
#ifdef SMP
/*
* We start off at a nesting level of 1 within the kernel.
*/
td->td_md.md_kernnest = 1;
#endif
}
void
cpu_set_args(struct thread *td, struct kse *ke)
{
/* XXX
suword((void *)(ke->ke_frame->tf_esp + sizeof(void *)),
(int)ke->ke_mailbox);
*/
}
void
cpu_free_kse_mdstorage(struct kse *kse)
{
free(kse->ke_mdstorage, M_TEMP);
kse->ke_mdstorage = NULL;
kse->ke_pcb = NULL;
kse->ke_frame = NULL;
}
int
cpu_export_context(struct thread *td)
{
/* XXXKSE */
#if 0
struct trapframe *frame;
struct thread_mailbox *tm;
struct trapframe *uframe;
int error;
frame = td->td_frame;
tm = td->td_mailbox;
uframe = &tm->ctx.tfrm.tf_tf;
error = copyout(frame, uframe, sizeof(*frame));
/*
* "What about the fp regs?" I hear you ask.... XXXKSE
* Don't know where gs and "onstack" come from.
* May need to fiddle a few other values too.
*/
return (error);
#endif
return (0);
}
void
cpu_wait(p)
struct proc *p;

1
sys/alpha/linux/linux_machdep.c
View File

@ -180,7 +180,6 @@ linux_clone(struct thread *td, struct linux_clone_args *args)
* Make this runnable after we are finished with it.
*/
mtx_lock_spin(&sched_lock);
p2->p_stat = SRUN;
setrunqueue(FIRST_THREAD_IN_PROC(p2));
mtx_unlock_spin(&sched_lock);

13
sys/amd64/amd64/cpu_switch.S
View File

@ -65,12 +65,19 @@ tlb_flush_count: .long 0
/*
* cpu_throw()
*
* This is the second half of cpu_swtch(). It is used when the current
* thread is either a dummy or slated to die, and we no longer care
* about its state.
*/
ENTRY(cpu_throw)
jmp sw1
/*
* cpu_switch()
*
* Save the current thread state, then select the next thread to run
* and load its state.
*/
ENTRY(cpu_switch)
@ -166,11 +173,11 @@ sw1b:
movl %eax,%ecx
#ifdef INVARIANTS
movl TD_PROC(%ecx), %eax /* XXXKSE */
cmpb $SRUN,P_STAT(%eax)
cmpb $TDS_RUNQ,TD_STATE(%ecx)
jne badsw2
#endif
movl $TDS_RUNNING,TD_STATE(%ecx)
movl TD_PCB(%ecx),%edx
#if defined(SWTCH_OPTIM_STATS)
@ -310,12 +317,14 @@ cpu_switch_load_gs:
#ifdef INVARIANTS
badsw2:
pushal
pushl $sw0_2
call panic
sw0_2: .asciz "cpu_switch: not TDS_RUNQ"
badsw3:
pushal
pushl $sw0_3
call panic

9
sys/amd64/amd64/genassym.c
View File

@ -79,10 +79,10 @@ ASSYM(P_VMSPACE, offsetof(struct proc, p_vmspace));
ASSYM(VM_PMAP, offsetof(struct vmspace, vm_pmap));
ASSYM(PM_ACTIVE, offsetof(struct pmap, pm_active));
ASSYM(P_SFLAG, offsetof(struct proc, p_sflag));
ASSYM(P_STAT, offsetof(struct proc, p_stat));
ASSYM(P_STATE, offsetof(struct proc, p_state));
ASSYM(P_UAREA, offsetof(struct proc, p_uarea));
/*ASSYM(TD_STAT, offsetof(struct thread, td__stat));*/
ASSYM(TD_STATE, offsetof(struct thread, td_state));
ASSYM(TD_FLAGS, offsetof(struct thread, td_flags));
ASSYM(TD_WCHAN, offsetof(struct thread, td_wchan));
ASSYM(TD_PCB, offsetof(struct thread, td_pcb));
@ -101,8 +101,9 @@ ASSYM(KE_FLAGS, offsetof(struct kse, ke_flags));
ASSYM(KEF_ASTPENDING, KEF_ASTPENDING);
ASSYM(KEF_NEEDRESCHED, KEF_NEEDRESCHED);
ASSYM(SSLEEP, SSLEEP);
ASSYM(SRUN, SRUN);
ASSYM(TDS_SLP, TDS_SLP);
ASSYM(TDS_RUNQ, TDS_RUNQ);
ASSYM(TDS_RUNNING, TDS_RUNNING);
ASSYM(V_TRAP, offsetof(struct vmmeter, v_trap));
ASSYM(V_SYSCALL, offsetof(struct vmmeter, v_syscall));
ASSYM(V_INTR, offsetof(struct vmmeter, v_intr));

2
sys/amd64/amd64/machdep.c
View File

@ -799,7 +799,7 @@ cpu_idle(void)
{
if (cpu_idle_hlt) {
disable_intr();
if (procrunnable()) {
if (kserunnable()) {
enable_intr();
} else {
/*

22
sys/amd64/amd64/pmap.c
View File

@ -1100,7 +1100,12 @@ pmap_dispose_thread(td)
ksobj = td->td_kstack_obj;
ks = td->td_kstack;
ptek = vtopte(ks);
#ifdef KSTACK_GUARD
ks -= PAGE_SIZE;
for (i = 1; i < (KSTACK_PAGES + 1); i++) {
#else
for (i = 0; i < KSTACK_PAGES; i++) {
#endif
m = vm_page_lookup(ksobj, i);
if (m == NULL)
panic("pmap_dispose_thread: kstack already missing?");
@ -1116,16 +1121,17 @@ pmap_dispose_thread(td)
#ifdef I386_CPU
invltlb();
#endif
/*
* If the thread got swapped out some of its KSTACK might have gotten
* swapped. Just get rid of the object to clean up the swap use
* proactively. NOTE! might block waiting for paging I/O to complete.
* Free the space that this stack was mapped to in the kernel
* address map.
*/
if (ksobj->type == OBJT_SWAP) {
td->td_kstack_obj = NULL;
vm_object_deallocate(ksobj);
}
#ifdef KSTACK_GUARD
kmem_free(kernel_map, ks, (KSTACK_PAGES + 1) * PAGE_SIZE);
#else
kmem_free(kernel_map, ks, KSTACK_PAGES * PAGE_SIZE);
#endif
vm_object_deallocate(ksobj);
td->td_kstack_obj = NULL; /* play it safe */
}
/*

13
sys/amd64/amd64/swtch.s
View File

@ -65,12 +65,19 @@ tlb_flush_count: .long 0
/*
* cpu_throw()
*
* This is the second half of cpu_swtch(). It is used when the current
* thread is either a dummy or slated to die, and we no longer care
* about its state.
*/
ENTRY(cpu_throw)
jmp sw1
/*
* cpu_switch()
*
* Save the current thread state, then select the next thread to run
* and load its state.
*/
ENTRY(cpu_switch)
@ -166,11 +173,11 @@ sw1b:
movl %eax,%ecx
#ifdef INVARIANTS
movl TD_PROC(%ecx), %eax /* XXXKSE */
cmpb $SRUN,P_STAT(%eax)
cmpb $TDS_RUNQ,TD_STATE(%ecx)
jne badsw2
#endif
movl $TDS_RUNNING,TD_STATE(%ecx)
movl TD_PCB(%ecx),%edx
#if defined(SWTCH_OPTIM_STATS)
@ -310,12 +317,14 @@ cpu_switch_load_gs:
#ifdef INVARIANTS
badsw2:
pushal
pushl $sw0_2
call panic
sw0_2: .asciz "cpu_switch: not TDS_RUNQ"
badsw3:
pushal
pushl $sw0_3
call panic

43
sys/amd64/amd64/trap.c
View File

@ -54,6 +54,7 @@
#include <sys/bus.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/kse.h>
#include <sys/pioctl.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
@ -267,6 +268,17 @@ trap(frame)
if (td->td_ucred != p->p_ucred)
cred_update_thread(td);
/*
* First check that we shouldn't just abort.
* But check if we are the single thread first!
*/
if ((p->p_flag & P_WEXIT) && (p->p_singlethread != td)) {
mtx_lock_spin(&sched_lock);
PROC_LOCK(p);
thread_exit();
/* NOTREACHED */
}
switch (type) {
case T_PRIVINFLT: /* privileged instruction fault */
ucode = type;
@ -939,11 +951,30 @@ syscall(frame)
mtx_unlock(&Giant);
}
#endif
KASSERT((td->td_kse != NULL), ("syscall: kse/thread UNLINKED"));
KASSERT((td->td_kse->ke_thread == td), ("syscall:kse/thread mismatch"));
sticks = td->td_kse->ke_sticks;
td->td_frame = &frame;
if (td->td_ucred != p->p_ucred)
cred_update_thread(td);
if (p->p_flag & P_KSES) {
/*
* If we are doing a syscall in a KSE environment,
* note where our mailbox is. There is always the
* possibility that we could do this lazily (in sleep()),
* but for now do it every time.
*/
td->td_mailbox = (void *)fuword((caddr_t)td->td_kse->ke_mailbox
+ offsetof(struct kse_mailbox, kmbx_current_thread));
if ((td->td_mailbox == NULL) ||
(td->td_mailbox == (void *)-1)) {
td->td_mailbox = NULL; /* single thread it.. */
td->td_flags &= ~TDF_UNBOUND;
} else {
td->td_flags |= TDF_UNBOUND;
}
}
params = (caddr_t)frame.tf_esp + sizeof(int);
code = frame.tf_eax;
orig_tf_eflags = frame.tf_eflags;
@ -1044,6 +1075,12 @@ syscall(frame)
break;
}
/*
* Release Giant if we previously set it.
*/
if ((callp->sy_narg & SYF_MPSAFE) == 0)
mtx_unlock(&Giant);
/*
* Traced syscall.
*/
@ -1057,12 +1094,6 @@ syscall(frame)
*/
userret(td, &frame, sticks);
/*
* Release Giant if we previously set it.
*/
if ((callp->sy_narg & SYF_MPSAFE) == 0)
mtx_unlock(&Giant);
#ifdef KTRACE
if (KTRPOINT(td, KTR_SYSRET))
ktrsysret(code, error, td->td_retval[0]);

160
sys/amd64/amd64/vm_machdep.c
View File

@ -53,6 +53,7 @@
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/kse.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/vnode.h>
@ -254,15 +255,26 @@ cpu_set_fork_handler(td, func, arg)
}
void
cpu_exit(td)
register struct thread *td;
cpu_exit(struct thread *td)
{
struct mdproc *mdp;
mdp = &td->td_proc->p_md;
if (mdp->md_ldt)
user_ldt_free(td);
reset_dbregs();
}
void
cpu_thread_exit(struct thread *td)
{
struct pcb *pcb = td->td_pcb;
struct mdproc *mdp = &td->td_proc->p_md;
#ifdef DEV_NPX
npxexit(td);
#endif
if (pcb->pcb_ext != 0) {
/* XXXKSE XXXSMP not SMP SAFE.. what locks do we have? */
/* if (pcb->pcb_ext->ext_refcount-- == 1) ?? */
/*
* XXX do we need to move the TSS off the allocated pages
* before freeing them? (not done here)
@ -271,8 +283,6 @@ cpu_exit(td)
ctob(IOPAGES + 1));
pcb->pcb_ext = 0;
}
if (mdp->md_ldt)
user_ldt_free(td);
if (pcb->pcb_flags & PCB_DBREGS) {
/*
* disable all hardware breakpoints
@ -288,6 +298,146 @@ cpu_sched_exit(td)
{
}
void
cpu_thread_setup(struct thread *td)
{
td->td_pcb =
(struct pcb *)(td->td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
td->td_frame = (struct trapframe *)((caddr_t)td->td_pcb - 16) - 1;
}
struct md_store {
struct pcb mds_pcb;
struct trapframe mds_frame;
};
void
cpu_save_upcall(struct thread *td, struct kse *newkse)
{
struct trapframe *tf;
newkse->ke_mdstorage = malloc(sizeof(struct md_store), M_TEMP,
M_WAITOK);
/* Note: use of M_WAITOK means it won't fail. */
/* set up shortcuts in MI section */
newkse->ke_pcb =
&(((struct md_store *)(newkse->ke_mdstorage))->mds_pcb);
newkse->ke_frame =
&(((struct md_store *)(newkse->ke_mdstorage))->mds_frame);
tf = newkse->ke_frame;
/* Copy the upcall pcb. Kernel mode & fp regs are here. */
/* XXXKSE this may be un-needed */
bcopy(td->td_pcb, newkse->ke_pcb, sizeof(struct pcb));
/*
* This initialises most of the user mode register values
* to good values. Eventually set them explicitly to know values
*/
bcopy(td->td_frame, newkse->ke_frame, sizeof(struct trapframe));
tf->tf_edi = 0;
tf->tf_esi = 0; /* trampoline arg */
tf->tf_ebp = 0;
tf->tf_esp = (int)newkse->ke_stackbase + newkse->ke_stacksize - 16;
tf->tf_ebx = 0; /* trampoline arg */
tf->tf_eip = (int)newkse->ke_upcall;
}
void
cpu_set_upcall(struct thread *td, void *pcb)
{
struct pcb *pcb2;
td->td_flags |= TDF_UPCALLING;
/* Point the pcb to the top of the stack. */
pcb2 = td->td_pcb;
/*
* Copy the upcall pcb. This loads kernel regs.
* Those not loaded individually below get their default
* values here.
*
* XXXKSE It might be a good idea to simply skip this as
* the values of the other registers may be unimportant.
* This would remove any requirement for knowing the KSE
* at this time (see the matching comment below for
* more analysis) (need a good safe default).
*/
bcopy(pcb, pcb2, sizeof(*pcb2));
/*
* Create a new fresh stack for the new thread.
* The -16 is so we can expand the trapframe if we go to vm86.
* Don't forget to set this stack value into whatever supplies
* the address for the fault handlers.
* The contexts are filled in at the time we actually DO the
* upcall as only then do we know which KSE we got.
*/
td->td_frame = (struct trapframe *)((caddr_t)pcb2 - 16) - 1;
/*
* Set registers for trampoline to user mode. Leave space for the
* return address on stack. These are the kernel mode register values.
*/
pcb2->pcb_cr3 = vtophys(vmspace_pmap(td->td_proc->p_vmspace)->pm_pdir);
pcb2->pcb_edi = 0;
pcb2->pcb_esi = (int)fork_return; /* trampoline arg */
pcb2->pcb_ebp = 0;
pcb2->pcb_esp = (int)td->td_frame - sizeof(void *); /* trampoline arg */
pcb2->pcb_ebx = (int)td; /* trampoline arg */
pcb2->pcb_eip = (int)fork_trampoline;
pcb2->pcb_psl &= ~(PSL_I); /* interrupts must be disabled */
/*
* If we didn't copy the pcb, we'd need to do the following registers:
* pcb2->pcb_dr*: cloned above.
* pcb2->pcb_savefpu: cloned above.
* pcb2->pcb_flags: cloned above.
* pcb2->pcb_onfault: cloned above (always NULL here?).
* pcb2->pcb_gs: cloned above. XXXKSE ???
* pcb2->pcb_ext: cleared below.
*/
pcb2->pcb_ext = NULL;
}
void
cpu_set_args(struct thread *td, struct kse *ke)
{
suword((void *)(ke->ke_frame->tf_esp + sizeof(void *)),
(int)ke->ke_mailbox);
}
void
cpu_free_kse_mdstorage(struct kse *kse)
{
free(kse->ke_mdstorage, M_TEMP);
kse->ke_mdstorage = NULL;
kse->ke_pcb = NULL;
kse->ke_frame = NULL;
}
int
cpu_export_context(struct thread *td)
{
struct trapframe *frame;
struct thread_mailbox *tm;
struct trapframe *uframe;
int error;
frame = td->td_frame;
tm = td->td_mailbox;
uframe = &tm->ctx.tfrm.tf_tf;
error = copyout(frame, uframe, sizeof(*frame));
/*
* "What about the fp regs?" I hear you ask.... XXXKSE
* Don't know where gs and "onstack" come from.
* May need to fiddle a few other values too.
*/
return (error);
}
void
cpu_wait(p)
struct proc *p;

63
sys/compat/linprocfs/linprocfs.c
View File

@ -538,21 +538,6 @@ linprocfs_doprocstat(PFS_FILL_ARGS)
return (0);
}
/*
* Map process state to descriptive letter. Note that this does not
* quite correspond to what Linux outputs, but it's close enough.
*/
static char *state_str[] = {
"? (unknown)",
"I (idle)",
"R (running)",
"S (sleeping)",
"T (stopped)",
"Z (zombie)",
"W (waiting)",
"M (mutex)"
};
/*
* Filler function for proc/pid/status
*/
@ -562,13 +547,53 @@ linprocfs_doprocstatus(PFS_FILL_ARGS)
struct kinfo_proc kp;
char *state;
segsz_t lsize;
struct thread *td2;
int i;
mtx_lock_spin(&sched_lock);
if (p->p_stat > sizeof state_str / sizeof *state_str)
state = state_str[0];
else
state = state_str[(int)p->p_stat];
td2 = FIRST_THREAD_IN_PROC(p); /* XXXKSE pretend only one thread */
if (P_SHOULDSTOP(p)) {
state = "T (stopped)";
} else {
switch(p->p_state) {
case PRS_NEW:
state = "I (idle)";
break;
case PRS_NORMAL:
if (p->p_flag & P_WEXIT) {
state = "X (exiting)";
break;
}
switch(td2->td_state) {
case TDS_SLP:
case TDS_MTX:
state = "S (sleeping)";
break;
case TDS_RUNQ:
case TDS_RUNNING:
state = "R (running)";
break;
case TDS_NEW:
case TDS_UNQUEUED:
case TDS_IWAIT:
case TDS_SURPLUS:
default:
state = "? (unknown)";
break;
}
break;
case PRS_WAIT:
state = "W (waiting)";
break;
case PRS_ZOMBIE:
state = "Z (zombie)";
break;
default:
state = "? (unknown)";
break;
}
}
mtx_unlock_spin(&sched_lock);
PROC_LOCK(p);

7
sys/compat/svr4/svr4_misc.c
View File

@ -1168,7 +1168,7 @@ svr4_setinfo(p, st, s)
if (p) {
i.si_pid = p->p_pid;
mtx_lock_spin(&sched_lock);
if (p->p_stat == SZOMB) {
if (p->p_state == PRS_ZOMBIE) {
i.si_stime = p->p_ru->ru_stime.tv_sec;
i.si_utime = p->p_ru->ru_utime.tv_sec;
}
@ -1256,7 +1256,7 @@ svr4_sys_waitsys(td, uap)
}
nfound++;
mtx_lock_spin(&sched_lock);
if (q->p_stat == SZOMB &&
if ((q->p_state == PRS_ZOMBIE) &&
((SCARG(uap, options) & (SVR4_WEXITED|SVR4_WTRAPPED)))) {
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(q);
@ -1372,7 +1372,8 @@ svr4_sys_waitsys(td, uap)
nprocs--;
return 0;
}
if (q->p_stat == SSTOP && (q->p_flag & P_WAITED) == 0 &&
/* XXXKSE this needs clarification */
if (P_SHOULDSTOP(q) && ((q->p_flag & P_WAITED) == 0) &&
(q->p_flag & P_TRACED ||
(SCARG(uap, options) & (SVR4_WSTOPPED|SVR4_WCONTINUED)))) {
mtx_unlock_spin(&sched_lock);

1
sys/conf/files
View File

@ -870,6 +870,7 @@ kern/kern_synch.c standard
kern/kern_syscalls.c standard
kern/kern_sysctl.c standard
kern/kern_tc.c standard
kern/kern_thread.c standard
kern/kern_time.c standard
kern/kern_timeout.c standard
kern/kern_uuid.c standard

38
sys/ddb/db_ps.c
View File

@ -52,6 +52,7 @@ db_ps(dummy1, dummy2, dummy3, dummy4)
int nl = 0;
volatile struct proc *p, *pp;
volatile struct thread *td;
char *state;
np = nprocs;
@ -96,23 +97,44 @@ db_ps(dummy1, dummy2, dummy3, dummy4)
if (pp == NULL)
pp = p;
db_printf("%5d %8p %8p %4d %5d %5d %07x %d",
switch(p->p_state) {
case PRS_NORMAL:
if (P_SHOULDSTOP(p))
state = "stopped";
else
state = "Normal";
break;
case PRS_NEW:
state = "New";
break;
case PRS_WAIT:
state = "Wait";
break;
case PRS_ZOMBIE:
state = "Zombie";
break;
default:
state = "Unknown";
break;
}
db_printf("%5d %8p %8p %4d %5d %5d %07x %s",
p->p_pid, (volatile void *)p, (void *)p->p_uarea,
p->p_ucred ? p->p_ucred->cr_ruid : 0, pp->p_pid,
p->p_pgrp ? p->p_pgrp->pg_id : 0, p->p_flag, p->p_stat);
p->p_pgrp ? p->p_pgrp->pg_id : 0, p->p_flag, state);
if (p->p_flag & P_KSES) {
db_printf("(threaded) %s\n", p->p_comm);
FOREACH_THREAD_IN_PROC(p, td) {
db_printf( ". . . . . . . "
". . . . . . . . ");
". thread %p . . . ", td);
if (td->td_wchan) {
db_printf("%6s %8p", td->td_wmesg,
db_printf("SLP %6s %8p\n", td->td_wmesg,
(void *)td->td_wchan);
} else if (p->p_stat == SMTX) {
db_printf("%6s %8p", td->td_mtxname,
} else if (td->td_state == TDS_MTX) {
db_printf("MTX %6s %8p\n", td->td_mtxname,
(void *)td->td_blocked);
} else {
db_printf("--not blocked--");
db_printf("--not blocked--\n");
}
}
} else {
@ -120,7 +142,7 @@ db_ps(dummy1, dummy2, dummy3, dummy4)
if (td->td_wchan) {
db_printf(" %6s %8p", td->td_wmesg,
(void *)td->td_wchan);
} else if (p->p_stat == SMTX) {
} else if (td->td_state == TDS_MTX) {
db_printf(" %6s %8p", td->td_mtxname,
(void *)td->td_blocked);
} else {

15
sys/fs/procfs/procfs_ctl.c
View File

@ -62,7 +62,7 @@
* relative to process (curp)
*/
#define TRACE_WAIT_P(curp, p) \
((p)->p_stat == SSTOP && \
(P_SHOULDSTOP(p) && \
(p)->p_pptr == (curp) && \
((p)->p_flag & P_TRACED))
@ -262,6 +262,7 @@ procfs_control(struct thread *td, struct proc *p, int op)
*/
case PROCFS_CTL_RUN:
PROC_UNLOCK(p);
p->p_flag &= ~P_STOPPED_SGNL; /* this uses SIGSTOP */
break;
/*
@ -272,27 +273,26 @@ procfs_control(struct thread *td, struct proc *p, int op)
case PROCFS_CTL_WAIT:
if (p->p_flag & P_TRACED) {
while (error == 0 &&
(p->p_stat != SSTOP) &&
(P_SHOULDSTOP(p)) &&
(p->p_flag & P_TRACED) &&
(p->p_pptr == td->td_proc))
error = msleep((caddr_t) p, &p->p_mtx,
PWAIT|PCATCH, "procfsx", 0);
if (error == 0 && !TRACE_WAIT_P(td->td_proc, p))
error = EBUSY;
} else
while (error == 0 && p->p_stat != SSTOP)
} else {
while (error == 0 && P_SHOULDSTOP(p))
error = msleep((caddr_t) p, &p->p_mtx,
PWAIT|PCATCH, "procfs", 0);
}
PROC_UNLOCK(p);
return (error);
default:
panic("procfs_control");
}
mtx_lock_spin(&sched_lock);
if (p->p_stat == SSTOP)
setrunnable(FIRST_THREAD_IN_PROC(p)); /* XXXKSE */
thread_unsuspend(p); /* If it can run, let it do so. */
mtx_unlock_spin(&sched_lock);
return (0);
}
@ -349,6 +349,7 @@ procfs_doprocctl(PFS_FILL_ARGS)
#endif
mtx_lock_spin(&sched_lock);
/* XXXKSE: */
p->p_flag &= ~P_STOPPED_SGNL;
setrunnable(FIRST_THREAD_IN_PROC(p));
mtx_unlock_spin(&sched_lock);
} else

2
sys/fs/procfs/procfs_dbregs.c
View File

@ -90,7 +90,7 @@ procfs_doprocdbregs(PFS_FILL_ARGS)
if (error == 0)
error = uiomove(kv, kl, uio);
if (error == 0 && uio->uio_rw == UIO_WRITE) {
if (p->p_stat != SSTOP)
if (!P_SHOULDSTOP(p)) /* XXXKSE should be P_TRACED? */
error = EBUSY;
else
/* XXXKSE: */

2
sys/fs/procfs/procfs_fpregs.c
View File

@ -84,7 +84,7 @@ procfs_doprocfpregs(PFS_FILL_ARGS)
if (error == 0)
error = uiomove(kv, kl, uio);
if (error == 0 && uio->uio_rw == UIO_WRITE) {
if (p->p_stat != SSTOP)
if (!P_SHOULDSTOP(p))
error = EBUSY;
else
/* XXXKSE: */

6
sys/fs/procfs/procfs_ioctl.c
View File

@ -94,9 +94,11 @@ procfs_ioctl(PFS_IOCTL_ARGS)
#if 0
mtx_lock_spin(&sched_lock);
p->p_step = 0;
if (p->p_stat == SSTOP) {
if (P_SHOULDSTOP(p)) {
p->p_xstat = sig;
setrunnable(FIRST_THREAD_IN_PROC(p));
p->p_flag &= ~(P_STOPPED_TRACE|P_STOPPED_SGNL);
FOREACH_THREAD_IN_PROC(p, td)
setrunnable(td); /* XXX Totally bogus */
mtx_unlock_spin(&sched_lock);
} else {
mtx_unlock_spin(&sched_lock);

2
sys/fs/procfs/procfs_regs.c
View File

@ -86,7 +86,7 @@ procfs_doprocregs(PFS_FILL_ARGS)
error = uiomove(kv, kl, uio);
PROC_LOCK(p);
if (error == 0 && uio->uio_rw == UIO_WRITE) {
if (p->p_stat != SSTOP)
if (!P_SHOULDSTOP(p))
error = EBUSY;
else
/* XXXKSE: */

9
sys/i386/i386/genassym.c
View File

@ -79,10 +79,10 @@ ASSYM(P_VMSPACE, offsetof(struct proc, p_vmspace));
ASSYM(VM_PMAP, offsetof(struct vmspace, vm_pmap));
ASSYM(PM_ACTIVE, offsetof(struct pmap, pm_active));
ASSYM(P_SFLAG, offsetof(struct proc, p_sflag));
ASSYM(P_STAT, offsetof(struct proc, p_stat));
ASSYM(P_STATE, offsetof(struct proc, p_state));
ASSYM(P_UAREA, offsetof(struct proc, p_uarea));
/*ASSYM(TD_STAT, offsetof(struct thread, td__stat));*/
ASSYM(TD_STATE, offsetof(struct thread, td_state));
ASSYM(TD_FLAGS, offsetof(struct thread, td_flags));
ASSYM(TD_WCHAN, offsetof(struct thread, td_wchan));
ASSYM(TD_PCB, offsetof(struct thread, td_pcb));
@ -101,8 +101,9 @@ ASSYM(KE_FLAGS, offsetof(struct kse, ke_flags));
ASSYM(KEF_ASTPENDING, KEF_ASTPENDING);
ASSYM(KEF_NEEDRESCHED, KEF_NEEDRESCHED);
ASSYM(SSLEEP, SSLEEP);
ASSYM(SRUN, SRUN);
ASSYM(TDS_SLP, TDS_SLP);
ASSYM(TDS_RUNQ, TDS_RUNQ);
ASSYM(TDS_RUNNING, TDS_RUNNING);
ASSYM(V_TRAP, offsetof(struct vmmeter, v_trap));
ASSYM(V_SYSCALL, offsetof(struct vmmeter, v_syscall));
ASSYM(V_INTR, offsetof(struct vmmeter, v_intr));

2
sys/i386/i386/machdep.c
View File

@ -799,7 +799,7 @@ cpu_idle(void)
{
if (cpu_idle_hlt) {
disable_intr();
if (procrunnable()) {
if (kserunnable()) {
enable_intr();
} else {
/*

22
sys/i386/i386/pmap.c
View File

@ -1100,7 +1100,12 @@ pmap_dispose_thread(td)
ksobj = td->td_kstack_obj;
ks = td->td_kstack;
ptek = vtopte(ks);
#ifdef KSTACK_GUARD
ks -= PAGE_SIZE;
for (i = 1; i < (KSTACK_PAGES + 1); i++) {
#else
for (i = 0; i < KSTACK_PAGES; i++) {
#endif
m = vm_page_lookup(ksobj, i);
if (m == NULL)
panic("pmap_dispose_thread: kstack already missing?");
@ -1116,16 +1121,17 @@ pmap_dispose_thread(td)
#ifdef I386_CPU
invltlb();
#endif
/*
* If the thread got swapped out some of its KSTACK might have gotten
* swapped. Just get rid of the object to clean up the swap use
* proactively. NOTE! might block waiting for paging I/O to complete.
* Free the space that this stack was mapped to in the kernel
* address map.
*/
if (ksobj->type == OBJT_SWAP) {
td->td_kstack_obj = NULL;
vm_object_deallocate(ksobj);
}
#ifdef KSTACK_GUARD
kmem_free(kernel_map, ks, (KSTACK_PAGES + 1) * PAGE_SIZE);
#else
kmem_free(kernel_map, ks, KSTACK_PAGES * PAGE_SIZE);
#endif
vm_object_deallocate(ksobj);
td->td_kstack_obj = NULL; /* play it safe */
}
/*

13
sys/i386/i386/swtch.s
View File

@ -65,12 +65,19 @@ tlb_flush_count: .long 0
/*
* cpu_throw()
*
* This is the second half of cpu_swtch(). It is used when the current
* thread is either a dummy or slated to die, and we no longer care
* about its state.
*/
ENTRY(cpu_throw)
jmp sw1
/*
* cpu_switch()
*
* Save the current thread state, then select the next thread to run
* and load its state.
*/
ENTRY(cpu_switch)
@ -166,11 +173,11 @@ sw1b:
movl %eax,%ecx
#ifdef INVARIANTS
movl TD_PROC(%ecx), %eax /* XXXKSE */
cmpb $SRUN,P_STAT(%eax)
cmpb $TDS_RUNQ,TD_STATE(%ecx)
jne badsw2
#endif
movl $TDS_RUNNING,TD_STATE(%ecx)
movl TD_PCB(%ecx),%edx
#if defined(SWTCH_OPTIM_STATS)
@ -310,12 +317,14 @@ cpu_switch_load_gs:
#ifdef INVARIANTS
badsw2:
pushal
pushl $sw0_2
call panic
sw0_2: .asciz "cpu_switch: not TDS_RUNQ"
badsw3:
pushal
pushl $sw0_3
call panic

43
sys/i386/i386/trap.c
View File

@ -54,6 +54,7 @@
#include <sys/bus.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/kse.h>
#include <sys/pioctl.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
@ -267,6 +268,17 @@ trap(frame)
if (td->td_ucred != p->p_ucred)
cred_update_thread(td);
/*
* First check that we shouldn't just abort.
* But check if we are the single thread first!
*/
if ((p->p_flag & P_WEXIT) && (p->p_singlethread != td)) {
mtx_lock_spin(&sched_lock);
PROC_LOCK(p);
thread_exit();
/* NOTREACHED */
}
switch (type) {
case T_PRIVINFLT: /* privileged instruction fault */
ucode = type;
@ -939,11 +951,30 @@ syscall(frame)
mtx_unlock(&Giant);
}
#endif
KASSERT((td->td_kse != NULL), ("syscall: kse/thread UNLINKED"));
KASSERT((td->td_kse->ke_thread == td), ("syscall:kse/thread mismatch"));
sticks = td->td_kse->ke_sticks;
td->td_frame = &frame;
if (td->td_ucred != p->p_ucred)
cred_update_thread(td);
if (p->p_flag & P_KSES) {
/*
* If we are doing a syscall in a KSE environment,
* note where our mailbox is. There is always the
* possibility that we could do this lazily (in sleep()),
* but for now do it every time.
*/
td->td_mailbox = (void *)fuword((caddr_t)td->td_kse->ke_mailbox
+ offsetof(struct kse_mailbox, kmbx_current_thread));
if ((td->td_mailbox == NULL) ||
(td->td_mailbox == (void *)-1)) {
td->td_mailbox = NULL; /* single thread it.. */
td->td_flags &= ~TDF_UNBOUND;
} else {
td->td_flags |= TDF_UNBOUND;
}
}
params = (caddr_t)frame.tf_esp + sizeof(int);
code = frame.tf_eax;
orig_tf_eflags = frame.tf_eflags;
@ -1044,6 +1075,12 @@ syscall(frame)
break;
}
/*
* Release Giant if we previously set it.
*/
if ((callp->sy_narg & SYF_MPSAFE) == 0)
mtx_unlock(&Giant);
/*
* Traced syscall.
*/
@ -1057,12 +1094,6 @@ syscall(frame)
*/
userret(td, &frame, sticks);
/*
* Release Giant if we previously set it.
*/
if ((callp->sy_narg & SYF_MPSAFE) == 0)
mtx_unlock(&Giant);
#ifdef KTRACE
if (KTRPOINT(td, KTR_SYSRET))
ktrsysret(code, error, td->td_retval[0]);

160
sys/i386/i386/vm_machdep.c
View File

@ -53,6 +53,7 @@
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/kse.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/vnode.h>
@ -254,15 +255,26 @@ cpu_set_fork_handler(td, func, arg)
}
void
cpu_exit(td)
register struct thread *td;
cpu_exit(struct thread *td)
{
struct mdproc *mdp;
mdp = &td->td_proc->p_md;
if (mdp->md_ldt)
user_ldt_free(td);
reset_dbregs();
}
void
cpu_thread_exit(struct thread *td)
{
struct pcb *pcb = td->td_pcb;
struct mdproc *mdp = &td->td_proc->p_md;
#ifdef DEV_NPX
npxexit(td);
#endif
if (pcb->pcb_ext != 0) {
/* XXXKSE XXXSMP not SMP SAFE.. what locks do we have? */
/* if (pcb->pcb_ext->ext_refcount-- == 1) ?? */
/*
* XXX do we need to move the TSS off the allocated pages
* before freeing them? (not done here)
@ -271,8 +283,6 @@ cpu_exit(td)
ctob(IOPAGES + 1));
pcb->pcb_ext = 0;
}
if (mdp->md_ldt)
user_ldt_free(td);
if (pcb->pcb_flags & PCB_DBREGS) {
/*
* disable all hardware breakpoints
@ -288,6 +298,146 @@ cpu_sched_exit(td)
{
}
void
cpu_thread_setup(struct thread *td)
{
td->td_pcb =
(struct pcb *)(td->td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
td->td_frame = (struct trapframe *)((caddr_t)td->td_pcb - 16) - 1;
}
struct md_store {
struct pcb mds_pcb;
struct trapframe mds_frame;
};
void
cpu_save_upcall(struct thread *td, struct kse *newkse)
{
struct trapframe *tf;
newkse->ke_mdstorage = malloc(sizeof(struct md_store), M_TEMP,
M_WAITOK);
/* Note: use of M_WAITOK means it won't fail. */
/* set up shortcuts in MI section */
newkse->ke_pcb =
&(((struct md_store *)(newkse->ke_mdstorage))->mds_pcb);
newkse->ke_frame =
&(((struct md_store *)(newkse->ke_mdstorage))->mds_frame);
tf = newkse->ke_frame;
/* Copy the upcall pcb. Kernel mode & fp regs are here. */
/* XXXKSE this may be un-needed */
bcopy(td->td_pcb, newkse->ke_pcb, sizeof(struct pcb));
/*
* This initialises most of the user mode register values
* to good values. Eventually set them explicitly to know values
*/
bcopy(td->td_frame, newkse->ke_frame, sizeof(struct trapframe));
tf->tf_edi = 0;
tf->tf_esi = 0; /* trampoline arg */
tf->tf_ebp = 0;
tf->tf_esp = (int)newkse->ke_stackbase + newkse->ke_stacksize - 16;
tf->tf_ebx = 0; /* trampoline arg */
tf->tf_eip = (int)newkse->ke_upcall;
}
void
cpu_set_upcall(struct thread *td, void *pcb)
{
struct pcb *pcb2;
td->td_flags |= TDF_UPCALLING;
/* Point the pcb to the top of the stack. */
pcb2 = td->td_pcb;
/*
* Copy the upcall pcb. This loads kernel regs.
* Those not loaded individually below get their default
* values here.
*
* XXXKSE It might be a good idea to simply skip this as
* the values of the other registers may be unimportant.
* This would remove any requirement for knowing the KSE
* at this time (see the matching comment below for
* more analysis) (need a good safe default).
*/
bcopy(pcb, pcb2, sizeof(*pcb2));
/*
* Create a new fresh stack for the new thread.
* The -16 is so we can expand the trapframe if we go to vm86.
* Don't forget to set this stack value into whatever supplies
* the address for the fault handlers.
* The contexts are filled in at the time we actually DO the
* upcall as only then do we know which KSE we got.
*/
td->td_frame = (struct trapframe *)((caddr_t)pcb2 - 16) - 1;
/*
* Set registers for trampoline to user mode. Leave space for the
* return address on stack. These are the kernel mode register values.
*/
pcb2->pcb_cr3 = vtophys(vmspace_pmap(td->td_proc->p_vmspace)->pm_pdir);
pcb2->pcb_edi = 0;
pcb2->pcb_esi = (int)fork_return; /* trampoline arg */
pcb2->pcb_ebp = 0;
pcb2->pcb_esp = (int)td->td_frame - sizeof(void *); /* trampoline arg */
pcb2->pcb_ebx = (int)td; /* trampoline arg */
pcb2->pcb_eip = (int)fork_trampoline;
pcb2->pcb_psl &= ~(PSL_I); /* interrupts must be disabled */
/*
* If we didn't copy the pcb, we'd need to do the following registers:
* pcb2->pcb_dr*: cloned above.
* pcb2->pcb_savefpu: cloned above.
* pcb2->pcb_flags: cloned above.
* pcb2->pcb_onfault: cloned above (always NULL here?).
* pcb2->pcb_gs: cloned above. XXXKSE ???
* pcb2->pcb_ext: cleared below.
*/
pcb2->pcb_ext = NULL;
}
void
cpu_set_args(struct thread *td, struct kse *ke)
{
suword((void *)(ke->ke_frame->tf_esp + sizeof(void *)),
(int)ke->ke_mailbox);
}
void
cpu_free_kse_mdstorage(struct kse *kse)
{
free(kse->ke_mdstorage, M_TEMP);
kse->ke_mdstorage = NULL;
kse->ke_pcb = NULL;
kse->ke_frame = NULL;
}
int
cpu_export_context(struct thread *td)
{
struct trapframe *frame;
struct thread_mailbox *tm;
struct trapframe *uframe;
int error;
frame = td->td_frame;
tm = td->td_mailbox;
uframe = &tm->ctx.tfrm.tf_tf;
error = copyout(frame, uframe, sizeof(*frame));
/*
* "What about the fp regs?" I hear you ask.... XXXKSE
* Don't know where gs and "onstack" come from.
* May need to fiddle a few other values too.
*/
return (error);
}
void
cpu_wait(p)
struct proc *p;

1
sys/i386/linux/linux_machdep.c
View File

@ -361,7 +361,6 @@ linux_clone(struct thread *td, struct linux_clone_args *args)
* Make this runnable after we are finished with it.
*/
mtx_lock_spin(&sched_lock);
p2->p_stat = SRUN;
setrunqueue(FIRST_THREAD_IN_PROC(p2));
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(p2);

2
sys/i386/linux/linux_ptrace.c
View File

@ -409,7 +409,7 @@ linux_ptrace(struct thread *td, struct linux_ptrace_args *uap)
}
/* not currently stopped */
if (p->p_stat != SSTOP || (p->p_flag & P_WAITED) == 0) {
if ((p->p_flag & (P_TRACED|P_WAITED)) == 0) {
error = EBUSY;
goto fail;
}

14
sys/ia64/ia64/trap.c
View File

@ -872,14 +872,14 @@ syscall(int code, u_int64_t *args, struct trapframe *framep)
break;
}
userret(td, framep, sticks);
/*
* Release Giant if we had to get it.
*/
if ((callp->sy_narg & SYF_MPSAFE) == 0)
mtx_unlock(&Giant);
userret(td, framep, sticks);
#ifdef KTRACE
if (KTRPOINT(td, KTR_SYSRET))
ktrsysret(code, error, td->td_retval[0]);
@ -1042,17 +1042,17 @@ ia32_syscall(struct trapframe *framep)
trapsignal(p, SIGTRAP, 0);
}
/*
* Handle reschedule and other end-of-syscall issues
*/
userret(td, framep, sticks);
/*
* Release Giant if we previously set it.
*/
if ((callp->sy_narg & SYF_MPSAFE) == 0)
mtx_unlock(&Giant);
/*
* Handle reschedule and other end-of-syscall issues
*/
userret(td, framep, sticks);
#ifdef KTRACE
if (KTRPOINT(td, KTR_SYSRET))
ktrsysret(code, error, td->td_retval[0]);

33
sys/kern/init_main.c
View File

@ -289,6 +289,7 @@ proc0_init(void *dummy __unused)
* Initialize thread, process and pgrp structures.
*/
procinit();
threadinit();
/*
* Initialize sleep queue hash table
@ -322,19 +323,34 @@ proc0_init(void *dummy __unused)
p->p_sysent = &aout_sysvec;
#endif
/*
* proc_linkup was already done in init_i386() or alphainit() etc.
* because the earlier code needed to follow td->td_proc. Otherwise
* I would have done it here.. maybe this means this should be
* done earlier too.
*/
ke = &proc0.p_kse; /* XXXKSE */
kg = &proc0.p_ksegrp; /* XXXKSE */
p->p_flag = P_SYSTEM;
p->p_sflag = PS_INMEM;
p->p_stat = SRUN;
p->p_ksegrp.kg_nice = NZERO;
kg->kg_pri_class = PRI_TIMESHARE;
kg->kg_user_pri = PUSER;
td->td_priority = PVM;
td->td_base_pri = PUSER;
p->p_state = PRS_NORMAL;
td->td_state = TDS_RUNNING;
kg->kg_nice = NZERO;
kg->kg_pri_class = PRI_TIMESHARE;
kg->kg_user_pri = PUSER;
td->td_priority = PVM;
td->td_base_pri = PUSER;
td->td_kse = ke; /* XXXKSE */
ke->ke_oncpu = 0;
ke->ke_state = KES_RUNNING;
ke->ke_thread = td;
/* proc_linkup puts it in the idle queue, that's not what we want. */
TAILQ_REMOVE(&kg->kg_iq, ke, ke_kgrlist);
kg->kg_idle_kses--;
p->p_peers = 0;
p->p_leader = p;
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self!"));
bcopy("swapper", p->p_comm, sizeof ("swapper"));
@ -662,8 +678,7 @@ kick_init(const void *udata __unused)
td = FIRST_THREAD_IN_PROC(initproc);
mtx_lock_spin(&sched_lock);
initproc->p_stat = SRUN;
setrunqueue(FIRST_THREAD_IN_PROC(initproc)); /* XXXKSE */
setrunqueue(td); /* XXXKSE */
mtx_unlock_spin(&sched_lock);
}
SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)

2
sys/kern/init_sysent.c
View File

@ -405,7 +405,7 @@ struct sysent sysent[] = {
{ 0, (sy_call_t *)kse_wakeup }, /* 380 = kse_wakeup */
{ AS(kse_new_args), (sy_call_t *)kse_new }, /* 381 = kse_new */
{ AS(thread_wakeup_args), (sy_call_t *)thread_wakeup }, /* 382 = thread_wakeup */
{ 0, (sy_call_t *)kse_yield }, /* 383 = kse_yield */
{ SYF_MPSAFE | 0, (sy_call_t *)kse_yield }, /* 383 = kse_yield */
{ 0, (sy_call_t *)nosys }, /* 384 = __mac_get_proc */
{ 0, (sy_call_t *)nosys }, /* 385 = __mac_set_proc */
{ 0, (sy_call_t *)nosys }, /* 386 = __mac_get_fd */

89
sys/kern/kern_condvar.c
View File

@ -48,7 +48,7 @@
*/
#define CV_ASSERT(cvp, mp, td) do { \
KASSERT((td) != NULL, ("%s: curthread NULL", __func__)); \
KASSERT((td)->td_proc->p_stat == SRUN, ("%s: not SRUN", __func__)); \
KASSERT((td)->td_state == TDS_RUNNING, ("%s: not TDS_RUNNING", __func__)); \
KASSERT((cvp) != NULL, ("%s: cvp NULL", __func__)); \
KASSERT((mp) != NULL, ("%s: mp NULL", __func__)); \
mtx_assert((mp), MA_OWNED | MA_NOTRECURSED); \
@ -80,6 +80,7 @@
#endif
static void cv_timedwait_end(void *arg);
static void cv_check_upcall(struct thread *td);
/*
* Initialize a condition variable. Must be called before use.
@ -108,6 +109,38 @@ cv_destroy(struct cv *cvp)
* Common code for cv_wait* functions. All require sched_lock.
*/
/*
* Decide if we need to queue an upcall.
* This is copied from msleep(), perhaps this should be a common function.
*/
static void
cv_check_upcall(struct thread *td)
{
/*
* If we are capable of async syscalls and there isn't already
* another one ready to return, start a new thread
* and queue it as ready to run. Note that there is danger here
* because we need to make sure that we don't sleep allocating
* the thread (recursion here might be bad).
* Hence the TDF_INMSLEEP flag.
*/
if ((td->td_proc->p_flag & P_KSES) && td->td_mailbox &&
(td->td_flags & TDF_INMSLEEP) == 0) {
/*
* If we have no queued work to do,
* upcall to the UTS to see if it has more work.
* We don't need to upcall now, just queue it.
*/
if (TAILQ_FIRST(&td->td_ksegrp->kg_runq) == NULL) {
/* Don't recurse here! */
td->td_flags |= TDF_INMSLEEP;
thread_schedule_upcall(td, td->td_kse);
td->td_flags &= ~TDF_INMSLEEP;
}
}
}
/*
* Switch context.
*/
@ -115,8 +148,9 @@ static __inline void
cv_switch(struct thread *td)
{
td->td_proc->p_stat = SSLEEP;
td->td_state = TDS_SLP;
td->td_proc->p_stats->p_ru.ru_nvcsw++;
cv_check_upcall(td);
mi_switch();
CTR3(KTR_PROC, "cv_switch: resume thread %p (pid %d, %s)", td,
td->td_proc->p_pid, td->td_proc->p_comm);
@ -135,7 +169,7 @@ cv_switch_catch(struct thread *td)
* We put ourselves on the sleep queue and start our timeout before
* calling cursig, as we could stop there, and a wakeup or a SIGCONT (or
* both) could occur while we were stopped. A SIGCONT would cause us to
* be marked as SSLEEP without resuming us, thus we must be ready for
* be marked as TDS_SLP without resuming us, thus we must be ready for
* sleep when cursig is called. If the wakeup happens while we're
* stopped, td->td_wchan will be 0 upon return from cursig.
*/
@ -143,13 +177,15 @@ cv_switch_catch(struct thread *td)
mtx_unlock_spin(&sched_lock);
p = td->td_proc;
PROC_LOCK(p);
sig = cursig(p); /* XXXKSE */
sig = cursig(td); /* XXXKSE */
if (thread_suspend_check(1))
sig = SIGSTOP;
mtx_lock_spin(&sched_lock);
PROC_UNLOCK(p);
if (sig != 0) {
if (td->td_wchan != NULL)
cv_waitq_remove(td);
td->td_proc->p_stat = SRUN;
td->td_state = TDS_RUNNING; /* XXXKSE */
} else if (td->td_wchan != NULL) {
cv_switch(td);
}
@ -175,7 +211,6 @@ cv_waitq_add(struct cv *cvp, struct thread *td)
td->td_flags |= TDF_CVWAITQ;
td->td_wchan = cvp;
td->td_wmesg = cvp->cv_description;
td->td_kse->ke_slptime = 0; /* XXXKSE */
td->td_ksegrp->kg_slptime = 0; /* XXXKSE */
td->td_base_pri = td->td_priority;
CTR3(KTR_PROC, "cv_waitq_add: thread %p (pid %d, %s)", td,
@ -285,7 +320,7 @@ cv_wait_sig(struct cv *cvp, struct mtx *mp)
PROC_LOCK(p);
if (sig == 0)
sig = cursig(p); /* XXXKSE */
sig = cursig(td); /* XXXKSE */
if (sig != 0) {
if (SIGISMEMBER(p->p_sigacts->ps_sigintr, sig))
rval = EINTR;
@ -293,6 +328,8 @@ cv_wait_sig(struct cv *cvp, struct mtx *mp)
rval = ERESTART;
}
PROC_UNLOCK(p);
if (p->p_flag & P_WEXIT)
rval = EINTR;
#ifdef KTRACE
if (KTRPOINT(td, KTR_CSW))
@ -363,6 +400,8 @@ cv_timedwait(struct cv *cvp, struct mtx *mp, int timo)
mi_switch();
}
if (td->td_proc->p_flag & P_WEXIT)
rval = EWOULDBLOCK;
mtx_unlock_spin(&sched_lock);
#ifdef KTRACE
if (KTRPOINT(td, KTR_CSW))
@ -436,12 +475,11 @@ cv_timedwait_sig(struct cv *cvp, struct mtx *mp, int timo)
td->td_proc->p_stats->p_ru.ru_nivcsw++;
mi_switch();
}
mtx_unlock_spin(&sched_lock);
PROC_LOCK(p);
if (sig == 0)
sig = cursig(p);
sig = cursig(td);
if (sig != 0) {
if (SIGISMEMBER(p->p_sigacts->ps_sigintr, sig))
rval = EINTR;
@ -450,6 +488,9 @@ cv_timedwait_sig(struct cv *cvp, struct mtx *mp, int timo)
}
PROC_UNLOCK(p);
if (p->p_flag & P_WEXIT)
rval = EINTR;
#ifdef KTRACE
if (KTRPOINT(td, KTR_CSW))
ktrcsw(0, 0);
@ -477,15 +518,13 @@ cv_wakeup(struct cv *cvp)
TAILQ_REMOVE(&cvp->cv_waitq, td, td_slpq);
td->td_flags &= ~TDF_CVWAITQ;
td->td_wchan = 0;
if (td->td_proc->p_stat == SSLEEP) {
if (td->td_state == TDS_SLP) {
/* OPTIMIZED EXPANSION OF setrunnable(td); */
CTR3(KTR_PROC, "cv_signal: thread %p (pid %d, %s)",
td, td->td_proc->p_pid, td->td_proc->p_comm);
if (td->td_ksegrp->kg_slptime > 1) /* XXXKSE */
updatepri(td);
td->td_kse->ke_slptime = 0;
td->td_ksegrp->kg_slptime = 0;
td->td_proc->p_stat = SRUN;
if (td->td_proc->p_sflag & PS_INMEM) {
setrunqueue(td);
maybe_resched(td);
@ -568,7 +607,7 @@ cv_timedwait_end(void *arg)
td->td_flags &= ~TDF_TIMEOUT;
setrunqueue(td);
} else if (td->td_wchan != NULL) {
if (td->td_proc->p_stat == SSLEEP) /* XXXKSE */
if (td->td_state == TDS_SLP) /* XXXKSE */
setrunnable(td);
else
cv_waitq_remove(td);
@ -577,3 +616,27 @@ cv_timedwait_end(void *arg)
td->td_flags |= TDF_TIMOFAIL;
mtx_unlock_spin(&sched_lock);
}
/*
* For now only abort interruptable waits.
* The others will have to either complete on their own or have a timeout.
*/
void
cv_abort(struct thread *td)
{
CTR3(KTR_PROC, "cv_abort: thread %p (pid %d, %s)", td,
td->td_proc->p_pid,
td->td_proc->p_comm);
mtx_lock_spin(&sched_lock);
if ((td->td_flags & (TDF_SINTR|TDF_TIMEOUT)) == TDF_SINTR) {
if (td->td_wchan != NULL) {
if (td->td_state == TDS_SLP)
setrunnable(td);
else
cv_waitq_remove(td);
}
}
mtx_unlock_spin(&sched_lock);
}

10
sys/kern/kern_exec.c
View File

@ -154,12 +154,14 @@ execve(td, uap)
PROC_LOCK(p);
KASSERT((p->p_flag & P_INEXEC) == 0,
("%s(): process already has P_INEXEC flag", __func__));
if ((p->p_flag & P_KSES) && thread_single(SNGLE_EXIT)) {
PROC_UNLOCK(p);
mtx_unlock(&Giant);
return (ERESTART); /* Try again later. */
}
/* If we get here all other threads are dead. */
p->p_flag |= P_INEXEC;
PROC_UNLOCK(p);
/* XXXKSE */
/* !!!!!!!! we need abort all the other threads of this process before we */
/* proceed beyond his point! */
/*
* Initialize part of the common data

97
sys/kern/kern_exit.c
View File

@ -145,6 +145,67 @@ exit1(td, rv)
/*
* XXXXKSE: MUST abort all other threads before proceeding past here.
*/
PROC_LOCK(p);
if (p->p_flag & P_KSES) {
/*
* First check if some other thread got here before us..
* if so, act apropriatly, (exit or suspend);
*/
thread_suspend_check(0);
/*
* Here is a trick..
* We need to free up our KSE to process other threads
* so that we can safely set the UNBOUND flag
* (whether or not we have a mailbox) as we are NEVER
* going to return to the user.
* The flag will not be set yet if we are exiting
* because of a signal, pagefault, or similar
* (or even an exit(2) from the UTS).
*/
td->td_flags |= TDF_UNBOUND;
/*
* Kill off the other threads. This requires
* Some co-operation from other parts of the kernel
* so it may not be instant.
* With this state set:
* Any thread entering the kernel from userspace will
* thread_exit() in trap(). Any thread attempting to
* sleep will return immediatly
* with EINTR or EWOULDBLOCK, which will hopefully force them
* to back out to userland, freeing resources as they go, and
* anything attempting to return to userland will thread_exit()
* from userret(). thread_exit() will unsuspend us
* when the last other thread exits.
*/
if (thread_single(SNGLE_EXIT)) {
panic ("Exit: Single threading fouled up");
}
/*
* All other activity in this process is now stopped.
* Remove excess KSEs and KSEGRPS. XXXKSE (when we have them)
* ...
* Turn off threading support.
*/
p->p_flag &= ~P_KSES;
td->td_flags &= ~TDF_UNBOUND;
thread_single_end(); /* Don't need this any more. */
}
/*
* With this state set:
* Any thread entering the kernel from userspace will thread_exit()
* in trap(). Any thread attempting to sleep will return immediatly
* with EINTR or EWOULDBLOCK, which will hopefully force them
* to back out to userland, freeing resources as they go, and
* anything attempting to return to userland will thread_exit()
* from userret(). thread_exit() will do a wakeup on p->p_numthreads
* if it transitions to 1.
*/
p->p_flag |= P_WEXIT;
PROC_UNLOCK(p);
if (td->td_kse->ke_mdstorage)
cpu_free_kse_mdstorage(td->td_kse);
/* Are we a task leader? */
PROC_LOCK(p);
@ -185,7 +246,6 @@ exit1(td, rv)
*/
PROC_LOCK(p);
p->p_flag &= ~(P_TRACED | P_PPWAIT);
p->p_flag |= P_WEXIT;
SIGEMPTYSET(p->p_siglist);
PROC_UNLOCK(p);
if (timevalisset(&p->p_realtimer.it_value))
@ -434,22 +494,24 @@ exit1(td, rv)
/*
* We have to wait until after releasing all locks before
* changing p_stat. If we block on a mutex then we will be
* changing p_state. If we block on a mutex then we will be
* back at SRUN when we resume and our parent will never
* harvest us.
*/
p->p_stat = SZOMB;
p->p_state = PRS_ZOMBIE;
wakeup(p->p_pptr);
PROC_UNLOCK(p->p_pptr);
PROC_UNLOCK(p);
cnt.v_swtch++;
binuptime(PCPU_PTR(switchtime));
PCPU_SET(switchticks, ticks);
cpu_sched_exit(td);
cpu_throw();
cpu_sched_exit(td); /* XXXKSE check if this should be in thread_exit */
/*
* Make sure this thread is discarded from the zombie.
* This will also release this thread's reference to the ucred.
*/
thread_exit();
panic("exit1");
}
@ -504,6 +566,8 @@ wait1(td, uap, compat)
register int nfound;
register struct proc *p, *q, *t;
int status, error;
struct kse *ke;
struct ksegrp *kg;
q = td->td_proc;
if (uap->pid == 0) {
@ -540,7 +604,7 @@ wait1(td, uap, compat)
}
nfound++;
if (p->p_stat == SZOMB) {
if (p->p_state == PRS_ZOMBIE) {
/*
* charge childs scheduling cpu usage to parent
* XXXKSE assume only one thread & kse & ksegrp
@ -655,6 +719,21 @@ wait1(td, uap, compat)
p->p_procsig = NULL;
}
/*
* There should only be one KSE/KSEGRP but
* do it right anyhow.
*/
FOREACH_KSEGRP_IN_PROC(p, kg) {
FOREACH_KSE_IN_GROUP(kg, ke) {
/* Free the KSE spare thread. */
if (ke->ke_tdspare != NULL) {
thread_free(ke->ke_tdspare);
p->p_kse.ke_tdspare = NULL;
}
}
}
thread_reap(); /* check for zombie threads */
/*
* Give vm and machine-dependent layer a chance
* to free anything that cpu_exit couldn't
@ -669,7 +748,7 @@ wait1(td, uap, compat)
mtx_unlock(&Giant);
return (0);
}
if (p->p_stat == SSTOP && (p->p_flag & P_WAITED) == 0 &&
if (P_SHOULDSTOP(p) && ((p->p_flag & P_WAITED) == 0) &&
(p->p_flag & P_TRACED || uap->options & WUNTRACED)) {
p->p_flag |= P_WAITED;
sx_xunlock(&proctree_lock);

75
sys/kern/kern_fork.c
View File

@ -212,23 +212,6 @@ sysctl_kern_randompid(SYSCTL_HANDLER_ARGS)
SYSCTL_PROC(_kern, OID_AUTO, randompid, CTLTYPE_INT|CTLFLAG_RW,
0, 0, sysctl_kern_randompid, "I", "Random PID modulus");
#if 0
void
kse_init(struct kse *kse1, struct kse *kse2)
{
}
void
thread_init(struct thread *thread1, struct thread *thread2)
{
}
void
ksegrp_init(struct ksegrp *ksegrp1, struct ksegrp *ksegrp2)
{
}
#endif
int
fork1(td, flags, procp)
struct thread *td; /* parent proc */
@ -296,6 +279,29 @@ fork1(td, flags, procp)
return (0);
}
if (p1->p_flag & P_KSES) {
/*
* Idle the other threads for a second.
* Since the user space is copied, it must remain stable.
* In addition, all threads (from the user perspective)
* need to either be suspended or in the kernel,
* where they will try restart in the parent and will
* be aborted in the child.
*/
PROC_LOCK(p1);
if (thread_single(SNGLE_NO_EXIT)) {
/* Abort.. someone else is single threading before us */
PROC_UNLOCK(p1);
return (ERESTART);
}
PROC_UNLOCK(p1);
/*
* All other activity in this process
* is now suspended at the user boundary,
* (or other safe places if we think of any).
*/
}
/* Allocate new proc. */
newproc = uma_zalloc(proc_zone, M_WAITOK);
@ -311,6 +317,11 @@ fork1(td, flags, procp)
if ((nprocs >= maxproc - 10 && uid != 0) || nprocs >= maxproc) {
sx_xunlock(&allproc_lock);
uma_zfree(proc_zone, newproc);
if (p1->p_flag & P_KSES) {
PROC_LOCK(p1);
thread_single_end();
PROC_UNLOCK(p1);
}
tsleep(&forksleep, PUSER, "fork", hz / 2);
return (EAGAIN);
}
@ -325,6 +336,11 @@ fork1(td, flags, procp)
if (!ok) {
sx_xunlock(&allproc_lock);
uma_zfree(proc_zone, newproc);
if (p1->p_flag & P_KSES) {
PROC_LOCK(p1);
thread_single_end();
PROC_UNLOCK(p1);
}
tsleep(&forksleep, PUSER, "fork", hz / 2);
return (EAGAIN);
}
@ -411,7 +427,7 @@ fork1(td, flags, procp)
lastpid = trypid;
p2 = newproc;
p2->p_stat = SIDL; /* protect against others */
p2->p_state = PRS_NEW; /* protect against others */
p2->p_pid = trypid;
LIST_INSERT_HEAD(&allproc, p2, p_list);
LIST_INSERT_HEAD(PIDHASH(p2->p_pid), p2, p_hash);
@ -449,7 +465,7 @@ fork1(td, flags, procp)
* Start by zeroing the section of proc that is zero-initialized,
* then copy the section that is copied directly from the parent.
*/
td2 = thread_get(p2);
td2 = thread_alloc();
ke2 = &p2->p_kse;
kg2 = &p2->p_ksegrp;
@ -459,8 +475,10 @@ fork1(td, flags, procp)
(unsigned) RANGEOF(struct proc, p_startzero, p_endzero));
bzero(&ke2->ke_startzero,
(unsigned) RANGEOF(struct kse, ke_startzero, ke_endzero));
#if 0 /* bzero'd by the thread allocator */
bzero(&td2->td_startzero,
(unsigned) RANGEOF(struct thread, td_startzero, td_endzero));
#endif
bzero(&kg2->kg_startzero,
(unsigned) RANGEOF(struct ksegrp, kg_startzero, kg_endzero));
@ -482,9 +500,22 @@ fork1(td, flags, procp)
* XXXKSE Theoretically only the running thread would get copied
* Others in the kernel would be 'aborted' in the child.
* i.e return E*something*
* On SMP we would have to stop them running on
* other CPUs! (set a flag in the proc that stops
* all returns to userland until completed)
* This is wrong but ok for 1:1.
*/
proc_linkup(p2, kg2, ke2, td2);
/* Set up the thread as an active thread (as if runnable). */
TAILQ_REMOVE(&kg2->kg_iq, ke2, ke_kgrlist);
kg2->kg_idle_kses--;
ke2->ke_state = KES_UNQUEUED;
ke2->ke_thread = td2;
td2->td_kse = ke2;
td2->td_flags &= ~TDF_UNBOUND; /* For the rest of this syscall. */
KASSERT((ke2->ke_kgrlist.tqe_next != ke2), ("linked to self!"));
/* note.. XXXKSE no pcb or u-area yet */
/*
@ -699,7 +730,6 @@ fork1(td, flags, procp)
p2->p_acflag = AFORK;
if ((flags & RFSTOPPED) == 0) {
mtx_lock_spin(&sched_lock);
p2->p_stat = SRUN;
setrunqueue(td2);
mtx_unlock_spin(&sched_lock);
}
@ -803,6 +833,9 @@ fork_exit(callout, arg, frame)
struct proc *p = td->td_proc;
td->td_kse->ke_oncpu = PCPU_GET(cpuid);
p->p_state = PRS_NORMAL;
td->td_state = TDS_RUNNING; /* Already done in switch() on 386. */
td->td_kse->ke_state = KES_RUNNING;
/*
* Finish setting up thread glue. We need to initialize
* the thread into a td_critnest=1 state. Some platforms
@ -814,7 +847,7 @@ fork_exit(callout, arg, frame)
sched_lock.mtx_lock = (uintptr_t)td;
sched_lock.mtx_recurse = 0;
cpu_critical_fork_exit();
CTR3(KTR_PROC, "fork_exit: new proc %p (pid %d, %s)", p, p->p_pid,
CTR3(KTR_PROC, "fork_exit: new thread %p (pid %d, %s)", td, p->p_pid,
p->p_comm);
if (PCPU_GET(switchtime.sec) == 0)
binuptime(PCPU_PTR(switchtime));

19
sys/kern/kern_idle.c
View File

@ -40,6 +40,7 @@ idle_setup(void *dummy)
struct pcpu *pc;
#endif
struct proc *p;
struct thread *td;
int error;
#ifdef SMP
@ -60,7 +61,10 @@ idle_setup(void *dummy)
panic("idle_setup: kthread_create error %d\n", error);
p->p_flag |= P_NOLOAD;
p->p_stat = SRUN;
td = FIRST_THREAD_IN_PROC(p);
td->td_state = TDS_RUNQ;
td->td_kse->ke_state = KES_ONRUNQ;
td->td_kse->ke_flags |= KEF_IDLEKSE;
#ifdef SMP
}
#endif
@ -75,16 +79,22 @@ idle_proc(void *dummy)
#ifdef DIAGNOSTIC
int count;
#endif
struct thread *td;
struct proc *p;
td = curthread;
p = td->td_proc;
td->td_state = TDS_RUNNING;
td->td_kse->ke_state = KES_RUNNING;
for (;;) {
mtx_assert(&Giant, MA_NOTOWNED);
#ifdef DIAGNOSTIC
count = 0;
while (count >= 0 && procrunnable() == 0) {
while (count >= 0 && kserunnable() == 0) {
#else
while (procrunnable() == 0) {
while (kserunnable() == 0) {
#endif
/*
* This is a good place to put things to be done in
@ -103,8 +113,9 @@ idle_proc(void *dummy)
}
mtx_lock_spin(&sched_lock);
curproc->p_stats->p_ru.ru_nvcsw++;
p->p_stats->p_ru.ru_nvcsw++;
mi_switch();
td->td_kse->ke_state = KES_RUNNING;
mtx_unlock_spin(&sched_lock);
}
}

27
sys/kern/kern_intr.c
View File

@ -201,7 +201,7 @@ ithread_create(struct ithd **ithread, int vector, int flags,
td = FIRST_THREAD_IN_PROC(p); /* XXXKSE */
td->td_ksegrp->kg_pri_class = PRI_ITHD;
td->td_priority = PRI_MAX_ITHD;
p->p_stat = SWAIT;
td->td_state = TDS_IWAIT;
ithd->it_td = td;
td->td_ithd = ithd;
if (ithread != NULL)
@ -229,8 +229,7 @@ ithread_destroy(struct ithd *ithread)
}
ithread->it_flags |= IT_DEAD;
mtx_lock_spin(&sched_lock);
if (p->p_stat == SWAIT) {
p->p_stat = SRUN; /* XXXKSE */
if (td->td_state == TDS_IWAIT) {
setrunqueue(td);
}
mtx_unlock_spin(&sched_lock);
@ -327,7 +326,7 @@ ithread_remove_handler(void *cookie)
* handler as being dead and let the ithread do the actual removal.
*/
mtx_lock_spin(&sched_lock);
if (ithread->it_td->td_proc->p_stat != SWAIT) {
if (ithread->it_td->td_state != TDS_IWAIT) {
handler->ih_flags |= IH_DEAD;
/*
@ -374,8 +373,8 @@ ithread_schedule(struct ithd *ithread, int do_switch)
td = ithread->it_td;
p = td->td_proc;
KASSERT(p != NULL, ("ithread %s has no process", ithread->it_name));
CTR4(KTR_INTR, "%s: pid %d: (%s) need = %d", __func__, p->p_pid, p->p_comm,
ithread->it_need);
CTR4(KTR_INTR, "%s: pid %d: (%s) need = %d",
__func__, p->p_pid, p->p_comm, ithread->it_need);
/*
* Set it_need to tell the thread to keep running if it is already
@ -387,14 +386,16 @@ ithread_schedule(struct ithd *ithread, int do_switch)
*/
ithread->it_need = 1;
mtx_lock_spin(&sched_lock);
if (p->p_stat == SWAIT) {
if (td->td_state == TDS_IWAIT) {
CTR2(KTR_INTR, "%s: setrunqueue %d", __func__, p->p_pid);
p->p_stat = SRUN;
setrunqueue(td); /* XXXKSE */
if (do_switch && curthread->td_critnest == 1 &&
curthread->td_proc->p_stat == SRUN) {
setrunqueue(td);
if (do_switch &&
(curthread->td_critnest == 1)/* &&
(curthread->td_state == TDS_RUNNING) XXXKSE*/) {
#if 0 /* not needed in KSE */
if (curthread != PCPU_GET(idlethread))
setrunqueue(curthread);
#endif
curthread->td_proc->p_stats->p_ru.ru_nivcsw++;
mi_switch();
} else {
@ -402,7 +403,7 @@ ithread_schedule(struct ithd *ithread, int do_switch)
}
} else {
CTR4(KTR_INTR, "%s: pid %d: it_need %d, state %d",
__func__, p->p_pid, ithread->it_need, p->p_stat);
__func__, p->p_pid, ithread->it_need, p->p_state);
}
mtx_unlock_spin(&sched_lock);
@ -550,7 +551,7 @@ ithread_loop(void *arg)
*/
if (ithd->it_enable != NULL)
ithd->it_enable(ithd->it_vector);
p->p_stat = SWAIT; /* we're idle */
td->td_state = TDS_IWAIT; /* we're idle */
p->p_stats->p_ru.ru_nvcsw++;
CTR2(KTR_INTR, "%s: pid %d: done", __func__, p->p_pid);
mi_switch();

3
sys/kern/kern_kthread.c
View File

@ -109,8 +109,7 @@ kthread_create(void (*func)(void *), void *arg,
mtx_lock_spin(&sched_lock);
p2->p_sflag |= PS_INMEM;
if (!(flags & RFSTOPPED)) {
p2->p_stat = SRUN;
setrunqueue(FIRST_THREAD_IN_PROC(p2)); /* XXXKSE */
setrunqueue(FIRST_THREAD_IN_PROC(p2));
}
mtx_unlock_spin(&sched_lock);

31
sys/kern/kern_mutex.c
View File

@ -119,23 +119,20 @@ propagate_priority(struct thread *td)
return;
}
KASSERT(td->td_state != TDS_SURPLUS, ("Mutex owner SURPLUS"));
MPASS(td->td_proc != NULL);
MPASS(td->td_proc->p_magic == P_MAGIC);
KASSERT(td->td_proc->p_stat != SSLEEP, ("sleeping thread owns a mutex"));
KASSERT(td->td_state != TDS_SLP,
("sleeping thread owns a mutex"));
if (td->td_priority <= pri) /* lower is higher priority */
return;
/*
* Bump this thread's priority.
*/
td->td_priority = pri;
/*
* If lock holder is actually running, just bump priority.
*/
if (thread_running(td)) {
MPASS(td->td_proc->p_stat == SRUN
|| td->td_proc->p_stat == SZOMB
|| td->td_proc->p_stat == SSTOP);
if (td->td_state == TDS_RUNNING) {
td->td_priority = pri;
return;
}
@ -151,20 +148,26 @@ propagate_priority(struct thread *td)
* If on run queue move to new run queue, and quit.
* XXXKSE this gets a lot more complicated under threads
* but try anyhow.
* We should have a special call to do this more efficiently.
*/
if (td->td_proc->p_stat == SRUN) {
if (td->td_state == TDS_RUNQ) {
MPASS(td->td_blocked == NULL);
remrunqueue(td);
td->td_priority = pri;
setrunqueue(td);
return;
}
/*
* Adjust for any other cases.
*/
td->td_priority = pri;
/*
* If we aren't blocked on a mutex, we should be.
*/
KASSERT(td->td_proc->p_stat == SMTX, (
KASSERT(td->td_state == TDS_MTX, (
"process %d(%s):%d holds %s but isn't blocked on a mutex\n",
td->td_proc->p_pid, td->td_proc->p_comm, td->td_proc->p_stat,
td->td_proc->p_pid, td->td_proc->p_comm, td->td_state,
m->mtx_object.lo_name));
/*
@ -590,7 +593,7 @@ _mtx_lock_sleep(struct mtx *m, int opts, const char *file, int line)
*/
td->td_blocked = m;
td->td_mtxname = m->mtx_object.lo_name;
td->td_proc->p_stat = SMTX;
td->td_state = TDS_MTX;
propagate_priority(td);
if (LOCK_LOG_TEST(&m->mtx_object, opts))
@ -727,7 +730,6 @@ _mtx_unlock_sleep(struct mtx *m, int opts, const char *file, int line)
m, td1);
td1->td_blocked = NULL;
td1->td_proc->p_stat = SRUN;
setrunqueue(td1);
if (td->td_critnest == 1 && td1->td_priority < pri) {
@ -744,7 +746,6 @@ _mtx_unlock_sleep(struct mtx *m, int opts, const char *file, int line)
}
}
#endif
setrunqueue(td);
if (LOCK_LOG_TEST(&m->mtx_object, opts))
CTR2(KTR_LOCK,
"_mtx_unlock_sleep: %p switching out lock=%p", m,

1
sys/kern/kern_poll.c
View File

@ -503,7 +503,6 @@ poll_idle(void)
mtx_unlock(&Giant);
mtx_assert(&Giant, MA_NOTOWNED);
mtx_lock_spin(&sched_lock);
setrunqueue(td);
td->td_proc->p_stats->p_ru.ru_nvcsw++;
mi_switch();
mtx_unlock_spin(&sched_lock);

217
sys/kern/kern_proc.c
View File

@ -44,6 +44,7 @@
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sysproto.h>
#include <sys/kse.h>
#include <sys/sysctl.h>
#include <sys/filedesc.h>
#include <sys/tty.h>
@ -111,44 +112,28 @@ procinit()
uihashinit();
}
/*
* Note that we do not link to the proc's ucred here
* The thread is linked as if running but no KSE assigned
*/
static void
thread_link(struct thread *td, struct ksegrp *kg)
{
struct proc *p = kg->kg_proc;
td->td_proc = p;
td->td_ksegrp = kg;
td->td_last_kse = &p->p_kse;
TAILQ_INSERT_HEAD(&p->p_threads, td, td_plist);
TAILQ_INSERT_HEAD(&kg->kg_threads, td, td_kglist);
td->td_critnest = 0;
td->td_kse = NULL;
cpu_thread_link(td);
}
/*
* KSE is linked onto the idle queue.
*/
static void
void
kse_link(struct kse *ke, struct ksegrp *kg)
{
struct proc *p = kg->kg_proc;
KASSERT((ke->ke_state != KES_ONRUNQ), ("linking suspect kse on run queue"));
TAILQ_INSERT_HEAD(&kg->kg_kseq, ke, ke_kglist);
kg->kg_kses++;
KASSERT((ke->ke_state != KES_IDLE), ("already on idle queue"));
ke->ke_state = KES_IDLE;
TAILQ_INSERT_HEAD(&kg->kg_iq, ke, ke_kgrlist);
kg->kg_idle_kses++;
ke->ke_proc = p;
ke->ke_ksegrp = kg;
ke->ke_thread = NULL;
ke->ke_oncpu = NOCPU;
}
static void
void
ksegrp_link(struct ksegrp *kg, struct proc *p)
{
@ -159,10 +144,13 @@ ksegrp_link(struct ksegrp *kg, struct proc *p)
TAILQ_INIT(&kg->kg_iq); /* all kses in ksegrp */
kg->kg_proc = p;
/* the following counters are in the -zero- section and may not need clearing */
kg->kg_numthreads = 0;
kg->kg_runnable = 0;
kg->kg_kses = 0;
kg->kg_idle_kses = 0;
kg->kg_runq_kses = 0; /* XXXKSE change name */
/* link it in now that it's consitant */
p->p_numksegrps++;
TAILQ_INSERT_HEAD(&p->p_ksegrps, kg, kg_ksegrp);
}
@ -177,30 +165,13 @@ proc_linkup(struct proc *p, struct ksegrp *kg,
TAILQ_INIT(&p->p_ksegrps); /* all ksegrps in proc */
TAILQ_INIT(&p->p_threads); /* all threads in proc */
TAILQ_INIT(&p->p_suspended); /* Threads suspended */
ksegrp_link(kg, p);
kse_link(ke, kg);
thread_link(td, kg);
/* link them together for 1:1 */
td->td_kse = ke;
ke->ke_thread = td;
}
/* temporary version is ultra simple while we are in 1:1 mode */
struct thread *
thread_get(struct proc *p)
{
struct thread *td = &p->p_xxthread;
return (td);
}
/*********************
* STUB KSE syscalls
*********************/
/* struct thread_wakeup_args { struct thread_mailbox *tmbx; }; */
int
thread_wakeup(struct thread *td, struct thread_wakeup_args *uap)
{
@ -219,7 +190,11 @@ int
kse_yield(struct thread *td, struct kse_yield_args *uap)
{
return(ENOSYS);
PROC_LOCK(td->td_proc);
mtx_lock_spin(&sched_lock);
thread_exit();
/* NOTREACHED */
return(0);
}
int kse_wakeup(struct thread *td, struct kse_wakeup_args *uap)
@ -228,16 +203,80 @@ int kse_wakeup(struct thread *td, struct kse_wakeup_args *uap)
return(ENOSYS);
}
int
kse_new(struct thread *td, struct kse_new_args *uap)
/*
* No new KSEG: first call: use current KSE, don't schedule an upcall
* All other situations, do alloate a new KSE and schedule an upcall on it.
*/
/* struct kse_new_args {
struct kse_mailbox *mbx;
int new_grp_flag;
}; */
int
kse_new(struct thread *td, struct kse_new_args *uap)
{
struct kse *newkse;
struct proc *p;
struct kse_mailbox mbx;
int err;
return (ENOSYS);
p = td->td_proc;
if ((err = copyin(uap->mbx, &mbx, sizeof(mbx))))
return (err);
PROC_LOCK(p);
/*
* If we have no KSE mode set, just set it, and skip KSE and KSEGRP
* creation. You cannot request a new group with the first one as
* you are effectively getting one. Instead, go directly to saving
* the upcall info.
*/
if ((td->td_proc->p_flag & P_KSES) || (uap->new_grp_flag)) {
return (EINVAL); /* XXX */
/*
* If newgroup then create the new group.
* Check we have the resources for this.
*/
/* Copy lots of fields from the current KSEGRP. */
/* Create the new KSE */
/* Copy lots of fields from the current KSE. */
} else {
/*
* We are switching to KSEs so just
* use the preallocated ones for this call.
* XXXKSE if we have to initialise any fields for KSE
* mode operation, do it here.
*/
newkse = td->td_kse;
}
/*
* Fill out the KSE-mode specific fields of the new kse.
*/
PROC_UNLOCK(p);
mtx_lock_spin(&sched_lock);
mi_switch(); /* Save current registers to PCB. */
mtx_unlock_spin(&sched_lock);
newkse->ke_upcall = mbx.kmbx_upcall;
newkse->ke_stackbase = mbx.kmbx_stackbase;
newkse->ke_stacksize = mbx.kmbx_stacksize;
newkse->ke_mailbox = uap->mbx;
cpu_save_upcall(td, newkse);
/* Note that we are the returning syscall */
td->td_retval[0] = 0;
td->td_retval[1] = 0;
if ((td->td_proc->p_flag & P_KSES) || (uap->new_grp_flag)) {
thread_schedule_upcall(td, newkse);
} else {
/*
* Don't set this until we are truely ready, because
* things will start acting differently. Return to the
* calling code for the first time. Assuming we set up
* the mailboxes right, all syscalls after this will be
* asynchronous.
*/
td->td_proc->p_flag |= P_KSES;
}
return (0);
}
/*
@ -554,7 +593,7 @@ fixjobc(p, pgrp, entering)
LIST_FOREACH(p, &p->p_children, p_sibling) {
if ((hispgrp = p->p_pgrp) != pgrp &&
hispgrp->pg_session == mysession &&
p->p_stat != SZOMB) {
p->p_state != PRS_ZOMBIE) {
PGRP_LOCK(hispgrp);
if (entering)
hispgrp->pg_jobc++;
@ -583,7 +622,7 @@ orphanpg(pg)
mtx_lock_spin(&sched_lock);
LIST_FOREACH(p, &pg->pg_members, p_pglist) {
if (p->p_stat == SSTOP) {
if (P_SHOULDSTOP(p)) {
mtx_unlock_spin(&sched_lock);
LIST_FOREACH(p, &pg->pg_members, p_pglist) {
PROC_LOCK(p);
@ -674,7 +713,9 @@ fill_kinfo_proc(p, kp)
kp->ki_sigcatch = p->p_procsig->ps_sigcatch;
}
mtx_lock_spin(&sched_lock);
if (p->p_stat != SIDL && p->p_stat != SZOMB && p->p_vmspace != NULL) {
if (p->p_state != PRS_NEW &&
p->p_state != PRS_ZOMBIE &&
p->p_vmspace != NULL) {
struct vmspace *vm = p->p_vmspace;
kp->ki_size = vm->vm_map.size;
@ -697,35 +738,65 @@ fill_kinfo_proc(p, kp)
p->p_stats->p_cru.ru_stime.tv_usec;
}
td = FIRST_THREAD_IN_PROC(p);
if (td->td_wmesg != NULL)
strncpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg) - 1);
if (p->p_stat == SMTX) {
kp->ki_kiflag |= KI_MTXBLOCK;
strncpy(kp->ki_mtxname, td->td_mtxname,
sizeof(kp->ki_mtxname) - 1);
if (!(p->p_flag & P_KSES)) {
if (td->td_wmesg != NULL) {
strncpy(kp->ki_wmesg, td->td_wmesg,
sizeof(kp->ki_wmesg) - 1);
}
if (td->td_state == TDS_MTX) {
kp->ki_kiflag |= KI_MTXBLOCK;
strncpy(kp->ki_mtxname, td->td_mtxname,
sizeof(kp->ki_mtxname) - 1);
}
}
kp->ki_stat = p->p_stat;
if (p->p_state == PRS_NORMAL) { /* XXXKSE very aproximate */
if ((td->td_state == TDS_RUNQ) ||
(td->td_state == TDS_RUNNING)) {
kp->ki_stat = SRUN;
} else if (td->td_state == TDS_SLP) {
kp->ki_stat = SSLEEP;
} else if (P_SHOULDSTOP(p)) {
kp->ki_stat = SSTOP;
} else if (td->td_state == TDS_MTX) {
kp->ki_stat = SMTX;
} else {
kp->ki_stat = SWAIT;
}
} else if (p->p_state == PRS_ZOMBIE) {
kp->ki_stat = SZOMB;
} else {
kp->ki_stat = SIDL;
}
kp->ki_sflag = p->p_sflag;
kp->ki_swtime = p->p_swtime;
kp->ki_pid = p->p_pid;
/* vvv XXXKSE */
bintime2timeval(&p->p_runtime, &tv);
kp->ki_runtime = tv.tv_sec * (u_int64_t)1000000 + tv.tv_usec;
kp->ki_pctcpu = p->p_kse.ke_pctcpu;
kp->ki_estcpu = td->td_ksegrp->kg_estcpu;
kp->ki_slptime = td->td_ksegrp->kg_slptime;
kp->ki_wchan = td->td_wchan;
kp->ki_pri.pri_level = td->td_priority;
kp->ki_pri.pri_user = td->td_ksegrp->kg_user_pri;
kp->ki_pri.pri_class = td->td_ksegrp->kg_pri_class;
kp->ki_pri.pri_native = td->td_base_pri;
kp->ki_nice = td->td_ksegrp->kg_nice;
kp->ki_rqindex = p->p_kse.ke_rqindex;
kp->ki_oncpu = p->p_kse.ke_oncpu;
kp->ki_lastcpu = td->td_lastcpu;
kp->ki_tdflags = td->td_flags;
kp->ki_pcb = td->td_pcb;
kp->ki_kstack = (void *)td->td_kstack;
if (!(p->p_flag & P_KSES)) {
bintime2timeval(&p->p_runtime, &tv);
kp->ki_runtime = tv.tv_sec * (u_int64_t)1000000 + tv.tv_usec;
kp->ki_pctcpu = p->p_kse.ke_pctcpu;
kp->ki_estcpu = p->p_ksegrp.kg_estcpu;
kp->ki_slptime = p->p_ksegrp.kg_slptime;
kp->ki_wchan = td->td_wchan;
kp->ki_pri.pri_level = td->td_priority;
kp->ki_pri.pri_user = p->p_ksegrp.kg_user_pri;
kp->ki_pri.pri_class = p->p_ksegrp.kg_pri_class;
kp->ki_pri.pri_native = td->td_base_pri;
kp->ki_nice = p->p_ksegrp.kg_nice;
kp->ki_rqindex = p->p_kse.ke_rqindex;
kp->ki_oncpu = p->p_kse.ke_oncpu;
kp->ki_lastcpu = td->td_lastcpu;
kp->ki_tdflags = td->td_flags;
kp->ki_pcb = td->td_pcb;
kp->ki_kstack = (void *)td->td_kstack;
} else {
kp->ki_oncpu = -1;
kp->ki_lastcpu = -1;
kp->ki_tdflags = -1;
/* All the reast are 0 */
}
/* ^^^ XXXKSE */
mtx_unlock_spin(&sched_lock);
sp = NULL;
@ -878,7 +949,7 @@ sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
/*
* Skip embryonic processes.
*/
if (p->p_stat == SIDL) {
if (p->p_state == PRS_NEW) {
PROC_UNLOCK(p);
continue;
}

1
sys/kern/kern_shutdown.c
View File

@ -281,7 +281,6 @@ boot(int howto)
DROP_GIANT();
for (subiter = 0; subiter < 50 * iter; subiter++) {
mtx_lock_spin(&sched_lock);
setrunqueue(curthread);
curthread->td_proc->p_stats->p_ru.ru_nvcsw++;
mi_switch(); /* Allow interrupt threads to run */
mtx_unlock_spin(&sched_lock);

390
sys/kern/kern_sig.c
View File

@ -84,7 +84,7 @@ static int killpg1(struct thread *td, int sig, int pgid, int all);
static int sig_ffs(sigset_t *set);
static int sigprop(int sig);
static void stop(struct proc *);
static void tdsignal(struct thread *td, int sig, sig_t action);
static int filt_sigattach(struct knote *kn);
static void filt_sigdetach(struct knote *kn);
static int filt_signal(struct knote *kn, long hint);
@ -168,16 +168,18 @@ static int sigproptbl[NSIG] = {
* Determine signal that should be delivered to process p, the current
* process, 0 if none. If there is a pending stop signal with default
* action, the process stops in issignal().
* XXXKSE the check for a pending stop is not done under KSE
*
* MP SAFE.
*/
int
cursig(struct proc *p)
cursig(struct thread *td)
{
struct proc *p = td->td_proc;
PROC_LOCK_ASSERT(p, MA_OWNED);
mtx_assert(&sched_lock, MA_NOTOWNED);
return (SIGPENDING(p) ? issignal(p) : 0);
return (SIGPENDING(p) ? issignal(td) : 0);
}
/*
@ -1042,7 +1044,7 @@ killpg1(td, sig, pgid, all)
PROC_UNLOCK(p);
continue;
}
if (p->p_stat == SZOMB) {
if (p->p_state == PRS_ZOMBIE) {
PROC_UNLOCK(p);
continue;
}
@ -1243,12 +1245,10 @@ psignal(p, sig)
register struct proc *p;
register int sig;
{
register int prop;
register sig_t action;
struct thread *td;
#ifdef SMP
struct ksegrp *kg;
#endif
register int prop;
KASSERT(_SIG_VALID(sig),
("psignal(): invalid signal %d\n", sig));
@ -1257,7 +1257,6 @@ psignal(p, sig)
KNOTE(&p->p_klist, NOTE_SIGNAL | sig);
prop = sigprop(sig);
/*
* If proc is traced, always give parent a chance;
* if signal event is tracked by procfs, give *that*
@ -1283,29 +1282,6 @@ psignal(p, sig)
action = SIG_DFL;
}
/*
* bring the priority of a process up if we want it to get
* killed in this lifetime.
* XXXKSE think if a better way to do this.
*
* What we need to do is see if there is a thread that will
* be able to accept the signal. e.g.
* FOREACH_THREAD_IN_PROC() {
* if runnable, we're done
* else pick one at random.
* }
*/
/* XXXKSE
* For now there is one thread per proc.
* Effectively select one sucker thread..
*/
td = FIRST_THREAD_IN_PROC(p);
mtx_lock_spin(&sched_lock);
if ((p->p_ksegrp.kg_nice > NZERO) && (action == SIG_DFL) &&
(prop & SA_KILL) && ((p->p_flag & P_TRACED) == 0))
p->p_ksegrp.kg_nice = NZERO; /* XXXKSE */
mtx_unlock_spin(&sched_lock);
if (prop & SA_CONT)
SIG_STOPSIGMASK(p->p_siglist);
@ -1316,48 +1292,125 @@ psignal(p, sig)
* is default; don't stop the process below if sleeping,
* and don't clear any pending SIGCONT.
*/
if (prop & SA_TTYSTOP && p->p_pgrp->pg_jobc == 0 &&
action == SIG_DFL)
if ((prop & SA_TTYSTOP) &&
(p->p_pgrp->pg_jobc == 0) &&
(action == SIG_DFL))
return;
SIG_CONTSIGMASK(p->p_siglist);
}
SIGADDSET(p->p_siglist, sig);
mtx_lock_spin(&sched_lock);
signotify(p);
mtx_unlock_spin(&sched_lock);
/*
* Defer further processing for signals which are held,
* except that stopped processes must be continued by SIGCONT.
* Some signals have a process-wide effect and a per-thread
* component. Most processing occurs when the process next
* tries to cross the user boundary, however there are some
* times when processing needs to be done immediatly, such as
* waking up threads so that they can cross the user boundary.
* We try do the per-process part here.
*/
if (action == SIG_HOLD && (!(prop & SA_CONT) || p->p_stat != SSTOP)) {
mtx_unlock_spin(&sched_lock);
return;
}
switch (p->p_stat) {
case SSLEEP:
if (P_SHOULDSTOP(p)) {
/*
* If process is sleeping uninterruptibly
* we can't interrupt the sleep... the signal will
* be noticed when the process returns through
* trap() or syscall().
* The process is in stopped mode. All the threads should be
* either winding down or already on the suspended queue.
*/
if ((td->td_flags & TDF_SINTR) == 0)
if (p->p_flag & P_TRACED) {
/*
* The traced process is already stopped,
* so no further action is necessary.
* No signal can restart us.
*/
goto out;
}
if (sig == SIGKILL) {
/*
* SIGKILL sets process running.
* It will die elsewhere.
* All threads must be restarted.
*/
p->p_flag &= ~P_STOPPED;
goto runfast;
}
if (prop & SA_CONT) {
/*
* If SIGCONT is default (or ignored), we continue the
* process but don't leave the signal in p_siglist as
* it has no further action. If SIGCONT is held, we
* continue the process and leave the signal in
* p_siglist. If the process catches SIGCONT, let it
* handle the signal itself. If it isn't waiting on
* an event, it goes back to run state.
* Otherwise, process goes back to sleep state.
*/
p->p_flag &= ~P_STOPPED_SGNL;
if (action == SIG_DFL) {
SIGDELSET(p->p_siglist, sig);
} else if (action == SIG_CATCH) {
/*
* The process wants to catch it so it needs
* to run at least one thread, but which one?
* It would seem that the answer would be to
* run an upcall in the next KSE to run, and
* deliver the signal that way. In a NON KSE
* process, we need to make sure that the
* single thread is runnable asap.
* XXXKSE for now however, make them all run.
*/
goto runfast;
}
/*
* The signal is not ignored or caught.
*/
mtx_lock_spin(&sched_lock);
thread_unsuspend(p); /* Checks if should do it. */
mtx_unlock_spin(&sched_lock);
goto out;
}
if (prop & SA_STOP) {
/*
* Already stopped, don't need to stop again
* (If we did the shell could get confused).
*/
SIGDELSET(p->p_siglist, sig);
goto out;
}
/*
* Process is sleeping and traced... make it runnable
* so it can discover the signal in issignal() and stop
* for the parent.
* All other kinds of signals:
* If a thread is sleeping interruptibly, simulate a
* wakeup so that when it is continued it will be made
* runnable and can look at the signal. However, don't make
* the process runnable, leave it stopped.
* It may run a bit until it hits a thread_suspend_check().
*
* XXXKSE I don't understand this at all.
*/
if (p->p_flag & P_TRACED)
goto run;
mtx_lock_spin(&sched_lock);
FOREACH_THREAD_IN_PROC(p, td) {
if (td->td_wchan && (td->td_flags & TDF_SINTR)) {
if (td->td_flags & TDF_CVWAITQ)
cv_waitq_remove(td);
else
unsleep(td);
setrunnable(td);
}
}
mtx_unlock_spin(&sched_lock);
goto out;
/*
* If SIGCONT is default (or ignored) and process is
* asleep, we are finished; the process should not
* be awakened.
* XXXKSE What about threads that are waiting on mutexes?
* Shouldn't they abort too?
*/
if ((prop & SA_CONT) && action == SIG_DFL) {
} else if (p->p_state == PRS_NORMAL) {
if (prop & SA_CONT) {
/*
* Already active, don't need to start again.
*/
SIGDELSET(p->p_siglist, sig);
goto out;
}
@ -1370,133 +1423,128 @@ psignal(p, sig)
if (prop & SA_STOP) {
if (action != SIG_DFL)
goto runfast;
/*
* If a child holding parent blocked,
* stopping could cause deadlock.
*/
if (p->p_flag & P_PPWAIT)
goto out;
mtx_unlock_spin(&sched_lock);
SIGDELSET(p->p_siglist, sig);
p->p_xstat = sig;
PROC_LOCK(p->p_pptr);
if ((p->p_pptr->p_procsig->ps_flag & PS_NOCLDSTOP) == 0)
if (!(p->p_pptr->p_procsig->ps_flag & PS_NOCLDSTOP))
psignal(p->p_pptr, SIGCHLD);
PROC_UNLOCK(p->p_pptr);
mtx_lock_spin(&sched_lock);
stop(p);
mtx_unlock_spin(&sched_lock);
goto out;
} else
goto runfast;
/* NOTREACHED */
} else {
/* Not in "NORMAL" state. discard the signal. */
SIGDELSET(p->p_siglist, sig);
goto out;
}
case SSTOP:
/*
* The process is not stopped so we need to apply the signal to all the
* running threads.
*/
runfast:
FOREACH_THREAD_IN_PROC(p, td)
tdsignal(td, sig, action);
mtx_lock_spin(&sched_lock);
thread_unsuspend(p);
mtx_unlock_spin(&sched_lock);
out:
/* If we jump here, sched_lock should not be owned. */
mtx_assert(&sched_lock, MA_NOTOWNED);
}
/*
* The force of a signal has been directed against a single
* thread. We need to see what we can do about knocking it
* out of any sleep it may be in etc.
*/
static void
tdsignal(struct thread *td, int sig, sig_t action)
{
struct proc *p = td->td_proc;
register int prop;
prop = sigprop(sig);
/*
* Bring the priority of a process up if we want it to get
* killed in this lifetime.
* XXXKSE we should shift the priority to the thread.
*/
mtx_lock_spin(&sched_lock);
if ((action == SIG_DFL) && (prop & SA_KILL)) {
if (td->td_priority > PUSER) {
td->td_priority = PUSER;
}
}
mtx_unlock_spin(&sched_lock);
/*
* Defer further processing for signals which are held,
* except that stopped processes must be continued by SIGCONT.
*/
if (action == SIG_HOLD) {
goto out;
}
mtx_lock_spin(&sched_lock);
if (td->td_state == TDS_SLP) {
/*
* If traced process is already stopped,
* then no further action is necessary.
* If thread is sleeping uninterruptibly
* we can't interrupt the sleep... the signal will
* be noticed when the process returns through
* trap() or syscall().
*/
if (p->p_flag & P_TRACED)
goto out;
/*
* Kill signal always sets processes running.
*/
if (sig == SIGKILL)
goto runfast;
if (prop & SA_CONT) {
/*
* If SIGCONT is default (or ignored), we continue the
* process but don't leave the signal in p_siglist, as
* it has no further action. If SIGCONT is held, we
* continue the process and leave the signal in
* p_siglist. If the process catches SIGCONT, let it
* handle the signal itself. If it isn't waiting on
* an event, then it goes back to run state.
* Otherwise, process goes back to sleep state.
*/
if (action == SIG_DFL)
SIGDELSET(p->p_siglist, sig);
if (action == SIG_CATCH)
goto runfast;
/*
* XXXKSE
* do this for each thread.
*/
if (p->p_flag & P_KSES) {
mtx_assert(&sched_lock,
MA_OWNED | MA_NOTRECURSED);
FOREACH_THREAD_IN_PROC(p, td) {
if (td->td_wchan == NULL) {
setrunnable(td); /* XXXKSE */
} else {
/* mark it as sleeping */
}
}
} else {
p->p_flag |= P_CONTINUED;
wakeup(p->p_pptr);
if (td->td_wchan == NULL)
goto run;
p->p_stat = SSLEEP;
}
if ((td->td_flags & TDF_SINTR) == 0) {
mtx_unlock_spin(&sched_lock);
goto out;
}
if (prop & SA_STOP) {
/*
* Already stopped, don't need to stop again.
* (If we did the shell could get confused.)
*/
/*
* Process is sleeping and traced. Make it runnable
* so it can discover the signal in issignal() and stop
* for its parent.
*/
if (p->p_flag & P_TRACED) {
p->p_flag &= ~P_STOPPED_TRACE;
goto run;
}
mtx_unlock_spin(&sched_lock);
/*
* If SIGCONT is default (or ignored) and process is
* asleep, we are finished; the process should not
* be awakened.
*/
if ((prop & SA_CONT) && action == SIG_DFL) {
SIGDELSET(p->p_siglist, sig);
goto out;
}
goto runfast;
/* NOTREACHED */
} else {
/*
* If process is sleeping interruptibly, then simulate a
* wakeup so that when it is continued, it will be made
* runnable and can look at the signal. But don't make
* the process runnable, leave it stopped.
* XXXKSE should we wake ALL blocked threads?
*/
if (p->p_flag & P_KSES) {
FOREACH_THREAD_IN_PROC(p, td) {
if (td->td_wchan && (td->td_flags & TDF_SINTR)){
if (td->td_flags & TDF_CVWAITQ)
cv_waitq_remove(td);
else
unsleep(td); /* XXXKSE */
}
}
} else {
if (td->td_wchan && td->td_flags & TDF_SINTR) {
if (td->td_flags & TDF_CVWAITQ)
cv_waitq_remove(td);
else
unsleep(td); /* XXXKSE */
}
}
goto out;
default:
/*
* SRUN, SIDL, SZOMB do nothing with the signal,
* Other states do nothing with the signal immediatly,
* other than kicking ourselves if we are running.
* It will either never be noticed, or noticed very soon.
*/
if (p->p_stat == SRUN) {
mtx_unlock_spin(&sched_lock);
if (td->td_state == TDS_RUNQ ||
td->td_state == TDS_RUNNING) {
signotify(td->td_proc);
#ifdef SMP
struct kse *ke;
struct thread *td = curthread;
/* we should only deliver to one thread.. but which one? */
FOREACH_KSEGRP_IN_PROC(p, kg) {
FOREACH_KSE_IN_GROUP(kg, ke) {
if (ke->ke_thread == td) {
continue;
}
forward_signal(ke->ke_thread);
}
}
if (td->td_state == TDS_RUNNING && td != curthread)
forward_signal(td);
#endif
}
goto out;
@ -1506,21 +1554,17 @@ psignal(p, sig)
runfast:
/*
* Raise priority to at least PUSER.
* XXXKSE Should we make them all run fast?
* Maybe just one would be enough?
*/
if (FIRST_THREAD_IN_PROC(p)->td_priority > PUSER) {
FIRST_THREAD_IN_PROC(p)->td_priority = PUSER;
mtx_lock_spin(&sched_lock);
if (td->td_priority > PUSER) {
td->td_priority = PUSER;
}
run:
/* If we jump here, sched_lock has to be owned. */
mtx_assert(&sched_lock, MA_OWNED | MA_NOTRECURSED);
setrunnable(td); /* XXXKSE */
out:
setrunnable(td);
mtx_unlock_spin(&sched_lock);
/* Once we get here, sched_lock should not be owned. */
out:
mtx_assert(&sched_lock, MA_NOTOWNED);
}
@ -1533,16 +1577,18 @@ psignal(p, sig)
* by checking the pending signal masks in cursig.) The normal call
* sequence is
*
* while (sig = cursig(curproc))
* while (sig = cursig(curthread))
* postsig(sig);
*/
int
issignal(p)
register struct proc *p;
issignal(td)
struct thread *td;
{
struct proc *p;
sigset_t mask;
register int sig, prop;
p = td->td_proc;
PROC_LOCK_ASSERT(p, MA_OWNED);
for (;;) {
int traced = (p->p_flag & P_TRACED) || (p->p_stops & S_SIG);
@ -1576,6 +1622,7 @@ issignal(p)
PROC_UNLOCK(p->p_pptr);
mtx_lock_spin(&sched_lock);
stop(p);
td->td_state = TDS_UNQUEUED;
PROC_UNLOCK(p);
DROP_GIANT();
p->p_stats->p_ru.ru_nivcsw++;
@ -1633,6 +1680,7 @@ issignal(p)
#endif
break; /* == ignore */
}
#if 0
/*
* If there is a pending stop signal to process
* with default action, stop here,
@ -1647,8 +1695,10 @@ issignal(p)
break; /* == ignore */
p->p_xstat = sig;
PROC_LOCK(p->p_pptr);
if ((p->p_pptr->p_procsig->ps_flag & PS_NOCLDSTOP) == 0)
if ((p->p_pptr->p_procsig->ps_flag &
PS_NOCLDSTOP) == 0) {
psignal(p->p_pptr, SIGCHLD);
}
PROC_UNLOCK(p->p_pptr);
mtx_lock_spin(&sched_lock);
stop(p);
@ -1660,7 +1710,9 @@ issignal(p)
PICKUP_GIANT();
PROC_LOCK(p);
break;
} else if (prop & SA_IGNORE) {
} else
#endif
if (prop & SA_IGNORE) {
/*
* Except for SIGCONT, shouldn't get here.
* Default action is to ignore; drop it.
@ -1706,7 +1758,7 @@ stop(p)
PROC_LOCK_ASSERT(p, MA_OWNED);
mtx_assert(&sched_lock, MA_OWNED);
p->p_stat = SSTOP;
p->p_flag |= P_STOPPED_SGNL;
p->p_flag &= ~P_WAITED;
wakeup(p->p_pptr);
}

1
sys/kern/kern_subr.c
View File

@ -538,7 +538,6 @@ uio_yield()
mtx_lock_spin(&sched_lock);
DROP_GIANT();
td->td_priority = td->td_ksegrp->kg_user_pri; /* XXXKSE */
setrunqueue(td);
td->td_proc->p_stats->p_ru.ru_nivcsw++;
mi_switch();
mtx_unlock_spin(&sched_lock);

664
sys/kern/kern_switch.c
View File

@ -26,6 +26,69 @@
* $FreeBSD$
*/
/***
Here is the logic..
If there are N processors, then there are at most N KSEs (kernel
schedulable entities) working to process threads that belong to a
KSEGOUP (kg). If there are X of these KSEs actually running at the
moment in question, then there are at most M (N-X) of these KSEs on
the run queue, as running KSEs are not on the queue.
Runnable threads are queued off the KSEGROUP in priority order.
If there are M or more threads runnable, the top M threads
(by priority) are 'preassigned' to the M KSEs not running. The KSEs take
their priority from those threads and are put on the run queue.
The last thread that had a priority high enough to have a KSE associated
with it, AND IS ON THE RUN QUEUE is pointed to by
kg->kg_last_assigned. If no threads queued off the KSEGROUP have KSEs
assigned as all the available KSEs are activly running, or because there
are no threads queued, that pointer is NULL.
When a KSE is removed from the run queue to become runnable, we know
it was associated with the highest priority thread in the queue (at the head
of the queue). If it is also the last assigned we know M was 1 and must
now be 0. Since the thread is no longer queued that pointer must be
removed from it. Since we know there were no more KSEs available,
(M was 1 and is now 0) and since we are not FREEING our KSE
but using it, we know there are STILL no more KSEs available, we can prove
that the next thread in the ksegrp list will not have a KSE to assign to
it, so we can show that the pointer must be made 'invalid' (NULL).
The pointer exists so that when a new thread is made runnable, it can
have its priority compared with the last assigned thread to see if
it should 'steal' its KSE or not.. i.e. is it 'earlier'
on the list than that thread or later.. If it's earlier, then the KSE is
removed from the last assigned (which is now not assigned a KSE)
and reassigned to the new thread, which is placed earlier in the list.
The pointer is then backed up to the previous thread (which may or may not
be the new thread).
When a thread sleeps or is removed, the KSE becomes available and if there
are queued threads that are not assigned KSEs, the highest priority one of
them is assigned the KSE, which is then placed back on the run queue at
the approipriate place, and the kg->kg_last_assigned pointer is adjusted down
to point to it.
The following diagram shows 2 KSEs and 3 threads from a single process.
RUNQ: --->KSE---KSE--... (KSEs queued at priorities from threads)
\ \____
\ \
KSEGROUP---thread--thread--thread (queued in priority order)
\ /
\_______________/
(last_assigned)
The result of this scheme is that the M available KSEs are always
queued at the priorities they have inherrited from the M highest priority
threads for that KSEGROUP. If this situation changes, the KSEs are
reassigned to keep this true.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
@ -44,34 +107,442 @@ CTASSERT((RQB_BPW * RQB_LEN) == RQ_NQS);
static struct runq runq;
SYSINIT(runq, SI_SUB_RUN_QUEUE, SI_ORDER_FIRST, runq_init, &runq)
/*
* Wrappers which implement old interface; act on global run queue.
*/
static void runq_readjust(struct runq *rq, struct kse *ke);
/************************************************************************
* Functions that manipulate runnability from a thread perspective. *
************************************************************************/
/*
* Select the KSE that will be run next. From that find the thread, and x
* remove it from the KSEGRP's run queue. If there is thread clustering,
* this will be what does it.
*/
struct thread *
choosethread(void)
{
return (runq_choose(&runq)->ke_thread);
struct kse *ke;
struct thread *td;
struct ksegrp *kg;
if ((ke = runq_choose(&runq))) {
td = ke->ke_thread;
KASSERT((td->td_kse == ke), ("kse/thread mismatch"));
kg = ke->ke_ksegrp;
if (td->td_flags & TDF_UNBOUND) {
TAILQ_REMOVE(&kg->kg_runq, td, td_runq);
if (kg->kg_last_assigned == td)
if (TAILQ_PREV(td, threadqueue, td_runq)
!= NULL)
printf("Yo MAMA!\n");
kg->kg_last_assigned = TAILQ_PREV(td,
threadqueue, td_runq);
/*
* If we have started running an upcall,
* Then TDF_UNBOUND WAS set because the thread was
* created without a KSE. Now that we have one,
* and it is our time to run, we make sure
* that BOUND semantics apply for the rest of
* the journey to userland, and into the UTS.
*/
#ifdef NOTYET
if (td->td_flags & TDF_UPCALLING)
tdf->td_flags &= ~TDF_UNBOUND;
#endif
}
kg->kg_runnable--;
CTR2(KTR_RUNQ, "choosethread: td=%p pri=%d",
td, td->td_priority);
} else {
/* Pretend the idle thread was on the run queue. */
td = PCPU_GET(idlethread);
/* Simulate that it was on the run queue */
td->td_state = TDS_RUNQ;
td->td_kse->ke_state = KES_UNQUEUED;
CTR1(KTR_RUNQ, "choosethread: td=%p (idle)", td);
}
thread_sanity_check(td);
return (td);
}
/*
* Given a KSE (now surplus), either assign a new runable thread to it
* (and put it in the run queue) or put it in the ksegrp's idle KSE list.
* Assumes the kse is not linked to any threads any more. (has been cleaned).
*/
void
kse_reassign(struct kse *ke)
{
struct ksegrp *kg;
struct thread *td;
kg = ke->ke_ksegrp;
KASSERT((ke->ke_state != KES_ONRUNQ), ("kse_reassigning non-free kse"));
/*
* Find the first unassigned thread
* If there is a 'last assigned' then see what's next.
* otherwise look at what is first.
*/
if ((td = kg->kg_last_assigned)) {
td = TAILQ_NEXT(td, td_runq);
} else {
td = TAILQ_FIRST(&kg->kg_runq);
}
/*
* If we found one assign it the kse, otherwise idle the kse.
*/
if (td) {
thread_sanity_check(td);
kg->kg_last_assigned = td;
td->td_kse = ke;
ke->ke_thread = td;
runq_add(&runq, ke);
CTR2(KTR_RUNQ, "kse_reassign: ke%p -> td%p", ke, td);
} else {
KASSERT((ke->ke_state != KES_IDLE), ("kse already idle"));
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self!"));
ke->ke_state = KES_IDLE;
ke->ke_thread = NULL;
TAILQ_INSERT_HEAD(&kg->kg_iq, ke, ke_kgrlist);
kg->kg_idle_kses++;
CTR1(KTR_RUNQ, "kse_reassign: ke%p idled", ke);
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self2!"));
}
}
int
procrunnable(void)
kserunnable(void)
{
return runq_check(&runq);
}
/*
* Remove a thread from its KSEGRP's run queue.
* This in turn may remove it from a KSE if it was already assigned
* to one, possibly causing a new thread to be assigned to the KSE
* and the KSE getting a new priority (unless it's a BOUND thread/KSE pair).
*/
void
remrunqueue(struct thread *td)
{
runq_remove(&runq, td->td_kse);
struct thread *td2, *td3;
struct ksegrp *kg;
struct kse *ke;
mtx_assert(&sched_lock, MA_OWNED);
thread_sanity_check(td);
KASSERT ((td->td_state == TDS_RUNQ),
("remrunqueue: Bad state on run queue"));
kg = td->td_ksegrp;
ke = td->td_kse;
/*
* If it's a bound thread/KSE pair, take the shortcut. All non-KSE
* threads are BOUND.
*/
CTR1(KTR_RUNQ, "remrunqueue: td%p", td);
td->td_state = TDS_UNQUEUED;
kg->kg_runnable--;
if ((td->td_flags & TDF_UNBOUND) == 0) {
/* Bring its kse with it, leave the thread attached */
runq_remove(&runq, ke);
ke->ke_state = KES_UNQUEUED;
return;
}
if (ke) {
/*
* This thread has been assigned to a KSE.
* We need to dissociate it and try assign the
* KSE to the next available thread. Then, we should
* see if we need to move the KSE in the run queues.
*/
td2 = kg->kg_last_assigned;
KASSERT((td2 != NULL), ("last assigned has wrong value "));
td->td_kse = NULL;
if ((td3 = TAILQ_NEXT(td2, td_runq))) {
KASSERT(td3 != td, ("td3 somehow matched td"));
/*
* Give the next unassigned thread to the KSE
* so the number of runnable KSEs remains
* constant.
*/
td3->td_kse = ke;
ke->ke_thread = td3;
kg->kg_last_assigned = td3;
runq_readjust(&runq, ke);
} else {
/*
* There is no unassigned thread.
* If we were the last assigned one,
* adjust the last assigned pointer back
* one, which may result in NULL.
*/
if (td == td2) {
kg->kg_last_assigned =
TAILQ_PREV(td, threadqueue, td_runq);
}
runq_remove(&runq, ke);
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self!"));
KASSERT((ke->ke_state != KES_IDLE),
("kse already idle"));
ke->ke_state = KES_IDLE;
ke->ke_thread = NULL;
KASSERT((TAILQ_FIRST(&kg->kg_iq) != ke), ("really bad screwup"));
TAILQ_INSERT_HEAD(&kg->kg_iq, ke, ke_kgrlist);
kg->kg_idle_kses++;
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self2!"));
}
}
TAILQ_REMOVE(&kg->kg_runq, td, td_runq);
thread_sanity_check(td);
}
#if 1 /* use the first version */
void
setrunqueue(struct thread *td)
{
runq_add(&runq, td->td_kse);
struct kse *ke;
struct ksegrp *kg;
struct thread *td2;
struct thread *tda;
CTR1(KTR_RUNQ, "setrunqueue: td%p", td);
mtx_assert(&sched_lock, MA_OWNED);
thread_sanity_check(td);
KASSERT((td->td_state != TDS_RUNQ), ("setrunqueue: bad thread state"));
td->td_state = TDS_RUNQ;
kg = td->td_ksegrp;
kg->kg_runnable++;
if ((td->td_flags & TDF_UNBOUND) == 0) {
KASSERT((td->td_kse != NULL),
("queueing BAD thread to run queue"));
/*
* Common path optimisation: Only one of everything
* and the KSE is always already attached.
* Totally ignore the ksegrp run queue.
*/
runq_add(&runq, td->td_kse);
return;
}
/*
* Ok, so we are threading with this thread.
* We don't have a KSE, see if we can get one..
*/
tda = kg->kg_last_assigned;
if ((ke = td->td_kse) == NULL) {
/*
* We will need a KSE, see if there is one..
* First look for a free one, before getting desperate.
* If we can't get one, our priority is not high enough..
* that's ok..
*/
if (kg->kg_idle_kses) {
/*
* There is a free one so it's ours for the asking..
*/
ke = TAILQ_FIRST(&kg->kg_iq);
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self3!"));
TAILQ_REMOVE(&kg->kg_iq, ke, ke_kgrlist);
ke->ke_state = KES_UNQUEUED;
kg->kg_idle_kses--;
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self4!"));
} else if (tda && (tda->td_priority > td->td_priority)) {
/*
* None free, but there is one we can commandeer.
*/
ke = tda->td_kse;
tda->td_kse = NULL;
ke->ke_thread = NULL;
tda = kg->kg_last_assigned =
TAILQ_PREV(tda, threadqueue, td_runq);
runq_remove(&runq, ke);
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self5!"));
}
} else {
KASSERT(ke->ke_thread == td, ("KSE/thread mismatch"));
KASSERT(ke->ke_state != KES_IDLE, ("KSE unexpectedly idle"));
ke->ke_thread = NULL;
td->td_kse = NULL;
}
/*
* Add the thread to the ksegrp's run queue at
* the appropriate place.
*/
TAILQ_FOREACH(td2, &kg->kg_runq, td_runq) {
if (td2->td_priority > td->td_priority) {
TAILQ_INSERT_BEFORE(td2, td, td_runq);
break;
}
}
if (td2 == NULL) {
/* We ran off the end of the TAILQ or it was empty. */
TAILQ_INSERT_TAIL(&kg->kg_runq, td, td_runq);
}
/*
* If we have a ke to use, then put it on the run queue and
* If needed, readjust the last_assigned pointer.
*/
if (ke) {
if (tda == NULL) {
/*
* No pre-existing last assigned so whoever is first
* gets the KSE we borught in.. (may be us)
*/
td2 = TAILQ_FIRST(&kg->kg_runq);
KASSERT((td2->td_kse == NULL),
("unexpected ke present"));
td2->td_kse = ke;
ke->ke_thread = td2;
kg->kg_last_assigned = td2;
} else if (tda->td_priority > td->td_priority) {
/*
* It's ours, grab it, but last_assigned is past us
* so don't change it.
*/
td->td_kse = ke;
ke->ke_thread = td;
} else {
/*
* We are past last_assigned, so
* put the new kse on whatever is next,
* which may or may not be us.
*/
td2 = TAILQ_NEXT(tda, td_runq);
kg->kg_last_assigned = td2;
td2->td_kse = ke;
ke->ke_thread = td2;
}
runq_add(&runq, ke);
}
thread_sanity_check(td);
}
#else
void
setrunqueue(struct thread *td)
{
struct kse *ke;
struct ksegrp *kg;
struct thread *td2;
CTR1(KTR_RUNQ, "setrunqueue: td%p", td);
KASSERT((td->td_state != TDS_RUNQ), ("setrunqueue: bad thread state"));
td->td_state = TDS_RUNQ;
kg = td->td_ksegrp;
kg->kg_runnable++;
if ((td->td_flags & TDF_UNBOUND) == 0) {
/*
* Common path optimisation: Only one of everything
* and the KSE is always already attached.
* Totally ignore the ksegrp run queue.
*/
runq_add(&runq, td->td_kse);
return;
}
/*
* First add the thread to the ksegrp's run queue at
* the appropriate place.
*/
TAILQ_FOREACH(td2, &kg->kg_runq, td_runq) {
if (td2->td_priority > td->td_priority) {
TAILQ_INSERT_BEFORE(td2, td, td_runq);
break;
}
}
if (td2 == NULL) {
/* We ran off the end of the TAILQ or it was empty. */
TAILQ_INSERT_TAIL(&kg->kg_runq, td, td_runq);
}
/*
* The following could be achieved by simply doing:
* td->td_kse = NULL; kse_reassign(ke);
* but I felt that I'd try do it inline here.
* All this work may not be worth it.
*/
if ((ke = td->td_kse)) { /* XXXKSE */
/*
* We have a KSE already. See whether we can keep it
* or if we need to give it to someone else.
* Either way it will need to be inserted into
* the runq. kse_reassign() will do this as will runq_add().
*/
if ((kg->kg_last_assigned) &&
(kg->kg_last_assigned->td_priority > td->td_priority)) {
/*
* We can definitly keep the KSE
* as the "last assignead thread" has
* less priority than we do.
* The "last assigned" pointer stays the same.
*/
runq_add(&runq, ke);
return;
}
/*
* Give it to the correct thread,
* which may be (often is) us, but may not be.
*/
td->td_kse = NULL;
kse_reassign(ke);
return;
}
/*
* There are two cases where KSE adjustment is needed.
* Usurpation of an already assigned KSE, and assignment
* of a previously IDLE KSE.
*/
if (kg->kg_idle_kses) {
/*
* If there are unassigned KSEs then we definitly
* will be assigned one from the idle KSE list.
* If we are the last, we should get the "last
* assigned" pointer set to us as well.
*/
ke = TAILQ_FIRST(&kg->kg_iq);
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self!"));
TAILQ_REMOVE(&kg->kg_iq, ke, ke_kgrlist);
ke->ke_state = KES_UNQUEUED;
kg->kg_idle_kses--;
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self!"));
ke->ke_thread = td;
td->td_kse = ke;
runq_add(&runq, ke);
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self!"));
if (TAILQ_NEXT(td, td_runq) == NULL) {
kg->kg_last_assigned = td;
}
} else if (kg->kg_last_assigned &&
(kg->kg_last_assigned->td_priority > td->td_priority)) {
/*
* If there were none last-assigned, all KSEs
* are actually out running as we speak.
* If there was a last assigned, but we didn't see it,
* we must be inserting before it, so take the KSE from
* the last assigned, and back it up one entry. Then,
* assign the KSE to the new thread and adjust its priority.
*/
td2 = kg->kg_last_assigned;
ke = td2->td_kse;
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self!"));
kg->kg_last_assigned =
TAILQ_PREV(td2, threadqueue, td_runq);
td2->td_kse = NULL;
td->td_kse = ke;
ke->ke_thread = td;
runq_readjust(&runq, ke);
KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self!"));
}
}
#endif
/************************************************************************
* Critical section marker functions *
************************************************************************/
/* Critical sections that prevent preemption. */
void
critical_enter(void)
@ -98,6 +569,23 @@ critical_exit(void)
}
}
/************************************************************************
* SYSTEM RUN QUEUE manipulations and tests *
************************************************************************/
/*
* Initialize a run structure.
*/
void
runq_init(struct runq *rq)
{
int i;
bzero(rq, sizeof *rq);
for (i = 0; i < RQ_NQS; i++)
TAILQ_INIT(&rq->rq_queues[i]);
}
/*
* Clear the status bit of the queue corresponding to priority level pri,
* indicating that it is empty.
@ -156,7 +644,7 @@ runq_setbit(struct runq *rq, int pri)
}
/*
* Add the process to the queue specified by its priority, and set the
* Add the KSE to the queue specified by its priority, and set the
* corresponding status bit.
*/
void
@ -165,14 +653,16 @@ runq_add(struct runq *rq, struct kse *ke)
struct rqhead *rqh;
int pri;
#ifdef INVARIANTS
struct proc *p = ke->ke_proc;
#endif
if (ke->ke_flags & KEF_ONRUNQ)
return;
mtx_assert(&sched_lock, MA_OWNED);
KASSERT(p->p_stat == SRUN, ("runq_add: proc %p (%s) not SRUN",
p, p->p_comm));
KASSERT((ke->ke_thread != NULL), ("runq_add: No thread on KSE"));
KASSERT((ke->ke_thread->td_kse != NULL), ("runq_add: No KSE on thread"));
if (ke->ke_state == KES_ONRUNQ)
return;
#if defined(INVARIANTS) && defined(DIAGNOSTIC)
KASSERT(ke->ke_state != KES_ONRUNQ,
("runq_add: kse %p (%s) already in run queue", ke,
ke->ke_proc->p_comm));
#endif
pri = ke->ke_thread->td_priority / RQ_PPQ;
ke->ke_rqindex = pri;
runq_setbit(rq, pri);
@ -180,7 +670,8 @@ runq_add(struct runq *rq, struct kse *ke)
CTR4(KTR_RUNQ, "runq_add: p=%p pri=%d %d rqh=%p",
ke->ke_proc, ke->ke_thread->td_priority, pri, rqh);
TAILQ_INSERT_TAIL(rqh, ke, ke_procq);
ke->ke_flags |= KEF_ONRUNQ;
ke->ke_ksegrp->kg_runq_kses++;
ke->ke_state = KES_ONRUNQ;
}
/*
@ -219,43 +710,38 @@ runq_choose(struct runq *rq)
int pri;
mtx_assert(&sched_lock, MA_OWNED);
if ((pri = runq_findbit(rq)) != -1) {
while ((pri = runq_findbit(rq)) != -1) {
rqh = &rq->rq_queues[pri];
ke = TAILQ_FIRST(rqh);
KASSERT(ke != NULL, ("runq_choose: no proc on busy queue"));
KASSERT(ke->ke_proc->p_stat == SRUN,
("runq_choose: process %d(%s) in state %d", ke->ke_proc->p_pid,
ke->ke_proc->p_comm, ke->ke_proc->p_stat));
CTR3(KTR_RUNQ, "runq_choose: pri=%d kse=%p rqh=%p", pri, ke, rqh);
CTR3(KTR_RUNQ,
"runq_choose: pri=%d kse=%p rqh=%p", pri, ke, rqh);
KASSERT(ke->ke_procq.tqe_prev != NULL, ("no prev"));
if (ke->ke_procq.tqe_next)
KASSERT(ke->ke_procq.tqe_next->ke_procq.tqe_prev != NULL, ("no next"));
TAILQ_REMOVE(rqh, ke, ke_procq);
ke->ke_ksegrp->kg_runq_kses--;
if (TAILQ_EMPTY(rqh)) {
CTR0(KTR_RUNQ, "runq_choose: empty");
runq_clrbit(rq, pri);
}
ke->ke_flags &= ~KEF_ONRUNQ;
ke->ke_state = KES_RUNNING;
KASSERT((ke->ke_thread != NULL),
("runq_choose: No thread on KSE"));
KASSERT((ke->ke_thread->td_kse != NULL),
("runq_choose: No KSE on thread"));
return (ke);
}
CTR1(KTR_RUNQ, "runq_choose: idleproc pri=%d", pri);
return (PCPU_GET(idlethread)->td_kse);
return (NULL);
}
/*
* Initialize a run structure.
*/
void
runq_init(struct runq *rq)
{
int i;
bzero(rq, sizeof *rq);
for (i = 0; i < RQ_NQS; i++)
TAILQ_INIT(&rq->rq_queues[i]);
}
/*
* Remove the process from the queue specified by its priority, and clear the
* Remove the KSE from the queue specified by its priority, and clear the
* corresponding status bit if the queue becomes empty.
* Caller must set ke->ke_state afterwards.
*/
void
runq_remove(struct runq *rq, struct kse *ke)
@ -263,8 +749,7 @@ runq_remove(struct runq *rq, struct kse *ke)
struct rqhead *rqh;
int pri;
if (!(ke->ke_flags & KEF_ONRUNQ))
return;
KASSERT((ke->ke_state == KES_ONRUNQ), ("KSE not on run queue"));
mtx_assert(&sched_lock, MA_OWNED);
pri = ke->ke_rqindex;
rqh = &rq->rq_queues[pri];
@ -276,5 +761,104 @@ runq_remove(struct runq *rq, struct kse *ke)
CTR0(KTR_RUNQ, "runq_remove: empty");
runq_clrbit(rq, pri);
}
ke->ke_flags &= ~KEF_ONRUNQ;
ke->ke_state = KES_UNQUEUED;
ke->ke_ksegrp->kg_runq_kses--;
}
static void
runq_readjust(struct runq *rq, struct kse *ke)
{
if (ke->ke_rqindex != (ke->ke_thread->td_priority / RQ_PPQ)) {
runq_remove(rq, ke);
runq_add(rq, ke);
}
}
void
thread_sanity_check(struct thread *td)
{
struct proc *p;
struct ksegrp *kg;
struct kse *ke;
struct thread *td2;
unsigned int prevpri;
int saw_lastassigned;
int unassigned;
int assigned;
p = td->td_proc;
kg = td->td_ksegrp;
ke = td->td_kse;
if (kg != &p->p_ksegrp) {
panic ("wrong ksegrp");
}
if (ke) {
if (ke != &p->p_kse) {
panic("wrong kse");
}
if (ke->ke_thread != td) {
panic("wrong thread");
}
}
if ((p->p_flag & P_KSES) == 0) {
if (ke == NULL) {
panic("non KSE thread lost kse");
}
} else {
prevpri = 0;
saw_lastassigned = 0;
unassigned = 0;
assigned = 0;
TAILQ_FOREACH(td2, &kg->kg_runq, td_runq) {
if (td2->td_priority < prevpri) {
panic("thread runqueue unosorted");
}
prevpri = td2->td_priority;
if (td2->td_kse) {
assigned++;
if (unassigned) {
panic("unassigned before assigned");
}
if (kg->kg_last_assigned == NULL) {
panic("lastassigned corrupt");
}
if (saw_lastassigned) {
panic("last assigned not last");
}
if (td2->td_kse->ke_thread != td2) {
panic("mismatched kse/thread");
}
} else {
unassigned++;
}
if (td2 == kg->kg_last_assigned) {
saw_lastassigned = 1;
if (td2->td_kse == NULL) {
panic("last assigned not assigned");
}
}
}
if (kg->kg_last_assigned && (saw_lastassigned == 0)) {
panic("where on earth does lastassigned point?");
}
FOREACH_THREAD_IN_GROUP(kg, td2) {
if (((td2->td_flags & TDF_UNBOUND) == 0) &&
(td2->td_state == TDS_RUNQ)) {
assigned++;
if (td2->td_kse == NULL) {
panic ("BOUND thread with no KSE");
}
}
}
#if 0
if ((unassigned + assigned) != kg->kg_runnable) {
panic("wrong number in runnable");
}
#endif
}
}

277
sys/kern/kern_synch.c
View File

@ -277,9 +277,13 @@ schedcpu(arg)
* with 16-bit int's (remember them?)
* overflow takes 45 days.
*/
/* XXXKSE */
/* if ((ke->ke_flags & KEF_ONRUNQ) == 0) */
if (p->p_stat == SSLEEP || p->p_stat == SSTOP) {
/* XXXKSE **WRONG***/
/*
* the kse slptimes are not touched in wakeup
* because the thread may not HAVE a KSE
*/
if (ke->ke_state == KES_ONRUNQ &&
ke->ke_state == KES_RUNNING) {
ke->ke_slptime++;
} else {
ke->ke_slptime = 0;
@ -321,20 +325,31 @@ schedcpu(arg)
}
kg->kg_estcpu = decay_cpu(loadfac, kg->kg_estcpu);
resetpriority(kg);
td = FIRST_THREAD_IN_PROC(p);
if (td->td_priority >= PUSER &&
(p->p_sflag & PS_INMEM)) {
int changedqueue =
((td->td_priority / RQ_PPQ) !=
(kg->kg_user_pri / RQ_PPQ));
FOREACH_THREAD_IN_GROUP(kg, td) {
int changedqueue;
if (td->td_priority >= PUSER) {
/*
* Only change the priority
* of threads that are still at their
* user priority.
* XXXKSE This is problematic
* as we may need to re-order
* the threads on the KSEG list.
*/
changedqueue =
((td->td_priority / RQ_PPQ) !=
(kg->kg_user_pri / RQ_PPQ));
td->td_priority = kg->kg_user_pri;
FOREACH_KSE_IN_GROUP(kg, ke) {
if ((ke->ke_oncpu == NOCPU) &&
(p->p_stat == SRUN) && /* XXXKSE */
changedqueue) {
remrunqueue(ke->ke_thread);
setrunqueue(ke->ke_thread);
td->td_priority = kg->kg_user_pri;
if (changedqueue &&
td->td_state == TDS_RUNQ) {
/* this could be optimised */
remrunqueue(td);
td->td_priority =
kg->kg_user_pri;
setrunqueue(td);
} else {
td->td_priority = kg->kg_user_pri;
}
}
}
@ -409,6 +424,7 @@ sleepinit(void)
* entered before msleep returns. If priority includes the PDROP
* flag the mutex is not entered before returning.
*/
int
msleep(ident, mtx, priority, wmesg, timo)
void *ident;
@ -426,9 +442,48 @@ msleep(ident, mtx, priority, wmesg, timo)
if (KTRPOINT(td, KTR_CSW))
ktrcsw(1, 0);
#endif
KASSERT((td->td_kse != NULL), ("msleep: NULL KSE?"));
KASSERT((td->td_kse->ke_state == KES_RUNNING), ("msleep: kse state?"));
WITNESS_SLEEP(0, &mtx->mtx_object);
KASSERT(timo != 0 || mtx_owned(&Giant) || mtx != NULL,
("sleeping without a mutex"));
/*
* If we are capable of async syscalls and there isn't already
* another one ready to return, start a new thread
* and queue it as ready to run. Note that there is danger here
* because we need to make sure that we don't sleep allocating
* the thread (recursion here might be bad).
* Hence the TDF_INMSLEEP flag.
*/
if (p->p_flag & P_KSES) {
/* Just don't bother if we are exiting
and not the exiting thread. */
if ((p->p_flag & P_WEXIT) && catch && p->p_singlethread != td)
return (EINTR);
if (td->td_mailbox && (!(td->td_flags & TDF_INMSLEEP))) {
/*
* If we have no queued work to do, then
* upcall to the UTS to see if it has more to do.
* We don't need to upcall now, just make it and
* queue it.
*/
mtx_lock_spin(&sched_lock);
if (TAILQ_FIRST(&td->td_ksegrp->kg_runq) == NULL) {
/* Don't recurse here! */
KASSERT((td->td_kse->ke_state == KES_RUNNING), ("msleep: kse stateX?"));
td->td_flags |= TDF_INMSLEEP;
thread_schedule_upcall(td, td->td_kse);
td->td_flags &= ~TDF_INMSLEEP;
KASSERT((td->td_kse->ke_state == KES_RUNNING), ("msleep: kse stateY?"));
}
mtx_unlock_spin(&sched_lock);
}
KASSERT((td->td_kse != NULL), ("msleep: NULL KSE2?"));
KASSERT((td->td_kse->ke_state == KES_RUNNING),
("msleep: kse state2?"));
KASSERT((td->td_kse->ke_thread == td),
("msleep: kse/thread mismatch?"));
}
mtx_lock_spin(&sched_lock);
if (cold || panicstr) {
/*
@ -454,7 +509,7 @@ msleep(ident, mtx, priority, wmesg, timo)
}
KASSERT(p != NULL, ("msleep1"));
KASSERT(ident != NULL && td->td_proc->p_stat == SRUN, ("msleep"));
KASSERT(ident != NULL && td->td_state == TDS_RUNNING, ("msleep"));
td->td_wchan = ident;
td->td_wmesg = wmesg;
@ -468,20 +523,23 @@ msleep(ident, mtx, priority, wmesg, timo)
callout_reset(&td->td_slpcallout, timo, endtsleep, td);
/*
* We put ourselves on the sleep queue and start our timeout
* before calling cursig, as we could stop there, and a wakeup
* or a SIGCONT (or both) could occur while we were stopped.
* A SIGCONT would cause us to be marked as SSLEEP
* before calling thread_suspend_check, as we could stop there, and
* a wakeup or a SIGCONT (or both) could occur while we were stopped.
* without resuming us, thus we must be ready for sleep
* when cursig is called. If the wakeup happens while we're
* stopped, td->td_wchan will be 0 upon return from cursig.
*/
if (catch) {
CTR3(KTR_PROC, "msleep caught: proc %p (pid %d, %s)", p,
CTR3(KTR_PROC, "msleep caught: thread %p (pid %d, %s)", td,
p->p_pid, p->p_comm);
td->td_flags |= TDF_SINTR;
mtx_unlock_spin(&sched_lock);
PROC_LOCK(p);
sig = cursig(p);
sig = cursig(td);
if (thread_suspend_check(1)) {
sig = EINTR;
rval = EINTR;
}
mtx_lock_spin(&sched_lock);
PROC_UNLOCK(p);
if (sig != 0) {
@ -492,13 +550,13 @@ msleep(ident, mtx, priority, wmesg, timo)
} else
sig = 0;
if (td->td_wchan != NULL) {
td->td_proc->p_stat = SSLEEP;
p->p_stats->p_ru.ru_nvcsw++;
td->td_state = TDS_SLP;
mi_switch();
}
CTR3(KTR_PROC, "msleep resume: proc %p (pid %d, %s)", td, p->p_pid,
CTR3(KTR_PROC, "msleep resume: thread %p (pid %d, %s)", td, p->p_pid,
p->p_comm);
KASSERT(td->td_proc->p_stat == SRUN, ("running but not SRUN"));
KASSERT(td->td_state == TDS_RUNNING, ("running but not TDS_RUNNING"));
td->td_flags &= ~TDF_SINTR;
if (td->td_flags & TDF_TIMEOUT) {
td->td_flags &= ~TDF_TIMEOUT;
@ -524,8 +582,8 @@ msleep(ident, mtx, priority, wmesg, timo)
if (rval == 0 && catch) {
PROC_LOCK(p);
/* XXX: shouldn't we always be calling cursig() */
if (sig != 0 || (sig = cursig(p))) {
/* XXX: shouldn't we always be calling cursig() */
if (sig != 0 || (sig = cursig(td))) {
if (SIGISMEMBER(p->p_sigacts->ps_sigintr, sig))
rval = EINTR;
else
@ -571,7 +629,7 @@ endtsleep(arg)
td->td_flags &= ~TDF_TIMEOUT;
setrunqueue(td);
} else if (td->td_wchan != NULL) {
if (td->td_proc->p_stat == SSLEEP) /* XXXKSE */
if (td->td_state == TDS_SLP) /* XXXKSE */
setrunnable(td);
else
unsleep(td);
@ -582,6 +640,38 @@ endtsleep(arg)
mtx_unlock_spin(&sched_lock);
}
/*
* Abort a thread, as if an interrupt had occured. Only abort
* interruptable waits (unfortunatly it isn't only safe to abort others).
* This is about identical to cv_abort().
* Think about merging them?
* Also, whatever the signal code does...
*/
void
abortsleep(struct thread *td)
{
mtx_lock_spin(&sched_lock);
/*
* If the TDF_TIMEOUT flag is set, just leave. A
* timeout is scheduled anyhow.
*/
if ((td->td_flags & (TDF_TIMEOUT | TDF_SINTR)) == TDF_SINTR) {
if (td->td_wchan != NULL) {
if (td->td_state == TDS_SLP) { /* XXXKSE */
setrunnable(td);
} else {
/*
* Probably in a suspended state..
* um.. dunno XXXKSE
*/
unsleep(td);
}
}
}
mtx_unlock_spin(&sched_lock);
}
/*
* Remove a process from its wait queue
*/
@ -618,25 +708,24 @@ wakeup(ident)
if (td->td_wchan == ident) {
TAILQ_REMOVE(qp, td, td_slpq);
td->td_wchan = NULL;
if (td->td_proc->p_stat == SSLEEP) {
if (td->td_state == TDS_SLP) {
/* OPTIMIZED EXPANSION OF setrunnable(p); */
CTR3(KTR_PROC, "wakeup: thread %p (pid %d, %s)",
td, p->p_pid, p->p_comm);
if (td->td_ksegrp->kg_slptime > 1)
updatepri(td);
td->td_ksegrp->kg_slptime = 0;
td->td_kse->ke_slptime = 0;
td->td_proc->p_stat = SRUN;
if (p->p_sflag & PS_INMEM) {
setrunqueue(td);
maybe_resched(td);
} else {
/* XXXKSE Wrong! */ td->td_state = TDS_RUNQ;
p->p_sflag |= PS_SWAPINREQ;
wakeup(&proc0);
}
/* END INLINE EXPANSION */
goto restart;
}
goto restart;
}
}
mtx_unlock_spin(&sched_lock);
@ -665,20 +754,19 @@ wakeup_one(ident)
if (td->td_wchan == ident) {
TAILQ_REMOVE(qp, td, td_slpq);
td->td_wchan = NULL;
if (td->td_proc->p_stat == SSLEEP) {
if (td->td_state == TDS_SLP) {
/* OPTIMIZED EXPANSION OF setrunnable(p); */
CTR3(KTR_PROC, "wakeup1: proc %p (pid %d, %s)",
p, p->p_pid, p->p_comm);
CTR3(KTR_PROC,"wakeup1: thread %p (pid %d, %s)",
td, p->p_pid, p->p_comm);
if (td->td_ksegrp->kg_slptime > 1)
updatepri(td);
td->td_ksegrp->kg_slptime = 0;
td->td_kse->ke_slptime = 0;
td->td_proc->p_stat = SRUN;
if (p->p_sflag & PS_INMEM) {
setrunqueue(td);
maybe_resched(td);
break;
} else {
/* XXXKSE Wrong */ td->td_state = TDS_RUNQ;
p->p_sflag |= PS_SWAPINREQ;
wakeup(&proc0);
}
@ -698,15 +786,19 @@ mi_switch()
{
struct bintime new_switchtime;
struct thread *td = curthread; /* XXX */
register struct proc *p = td->td_proc; /* XXX */
struct proc *p = td->td_proc; /* XXX */
struct kse *ke = td->td_kse;
#if 0
register struct rlimit *rlim;
#endif
u_int sched_nest;
mtx_assert(&sched_lock, MA_OWNED | MA_NOTRECURSED);
KASSERT((ke->ke_state == KES_RUNNING), ("mi_switch: kse state?"));
#ifdef INVARIANTS
if (p->p_stat != SMTX && p->p_stat != SRUN)
if (td->td_state != TDS_MTX &&
td->td_state != TDS_RUNQ &&
td->td_state != TDS_RUNNING)
mtx_assert(&Giant, MA_NOTOWNED);
#endif
@ -735,7 +827,8 @@ mi_switch()
*
* XXX drop sched_lock, pickup Giant
*/
if (p->p_stat != SZOMB && p->p_limit->p_cpulimit != RLIM_INFINITY &&
if (p->p_state != PRS_ZOMBIE &&
p->p_limit->p_cpulimit != RLIM_INFINITY &&
p->p_runtime > p->p_limit->p_cpulimit) {
rlim = &p->p_rlimit[RLIMIT_CPU];
if (p->p_runtime / (rlim_t)1000000 >= rlim->rlim_max) {
@ -763,17 +856,35 @@ mi_switch()
*/
cnt.v_swtch++;
PCPU_SET(switchtime, new_switchtime);
CTR3(KTR_PROC, "mi_switch: old proc %p (pid %d, %s)", p, p->p_pid,
CTR3(KTR_PROC, "mi_switch: old thread %p (pid %d, %s)", td, p->p_pid,
p->p_comm);
sched_nest = sched_lock.mtx_recurse;
td->td_lastcpu = td->td_kse->ke_oncpu;
td->td_kse->ke_oncpu = NOCPU;
td->td_kse->ke_flags &= ~KEF_NEEDRESCHED;
td->td_lastcpu = ke->ke_oncpu;
ke->ke_oncpu = NOCPU;
ke->ke_flags &= ~KEF_NEEDRESCHED;
/*
* At the last moment: if this KSE is not on the run queue,
* it needs to be freed correctly and the thread treated accordingly.
*/
if ((td->td_state == TDS_RUNNING) &&
((ke->ke_flags & KEF_IDLEKSE) == 0)) {
/* Put us back on the run queue (kse and all). */
setrunqueue(td);
} else if ((td->td_flags & TDF_UNBOUND) &&
(td->td_state != TDS_RUNQ)) { /* in case of old code */
/*
* We will not be on the run queue.
* Someone else can use the KSE if they need it.
*/
td->td_kse = NULL;
kse_reassign(ke);
}
cpu_switch();
td->td_kse->ke_oncpu = PCPU_GET(cpuid);
td->td_kse->ke_state = KES_RUNNING;
sched_lock.mtx_recurse = sched_nest;
sched_lock.mtx_lock = (uintptr_t)td;
CTR3(KTR_PROC, "mi_switch: new proc %p (pid %d, %s)", p, p->p_pid,
CTR3(KTR_PROC, "mi_switch: new thread %p (pid %d, %s)", td, p->p_pid,
p->p_comm);
if (PCPU_GET(switchtime.sec) == 0)
binuptime(PCPU_PTR(switchtime));
@ -791,37 +902,42 @@ setrunnable(struct thread *td)
struct proc *p = td->td_proc;
mtx_lock_spin(&sched_lock);
switch (p->p_stat) {
case SZOMB: /* not a thread flag XXXKSE */
switch (p->p_state) {
case PRS_ZOMBIE:
panic("setrunnable(1)");
}
switch (td->td_proc->p_stat) {
case 0:
case SRUN:
case SWAIT:
default:
break;
}
switch (td->td_state) {
case 0:
case TDS_RUNNING:
case TDS_IWAIT:
default:
printf("state is %d", td->td_state);
panic("setrunnable(2)");
case SSTOP:
case SSLEEP: /* e.g. when sending signals */
case TDS_SUSPENDED:
thread_unsuspend(p);
break;
case TDS_SLP: /* e.g. when sending signals */
if (td->td_flags & TDF_CVWAITQ)
cv_waitq_remove(td);
else
unsleep(td);
break;
case SIDL:
case TDS_UNQUEUED: /* being put back onto the queue */
case TDS_NEW: /* not yet had time to suspend */
case TDS_RUNQ: /* not yet had time to suspend */
break;
}
td->td_proc->p_stat = SRUN;
if (td->td_ksegrp->kg_slptime > 1)
updatepri(td);
td->td_ksegrp->kg_slptime = 0;
td->td_kse->ke_slptime = 0;
if ((p->p_sflag & PS_INMEM) == 0) {
td->td_state = TDS_RUNQ; /* XXXKSE not a good idea */
p->p_sflag |= PS_SWAPINREQ;
wakeup(&proc0);
} else {
setrunqueue(td);
if (td->td_state != TDS_RUNQ)
setrunqueue(td); /* XXXKSE */
maybe_resched(td);
}
mtx_unlock_spin(&sched_lock);
@ -848,7 +964,7 @@ resetpriority(kg)
kg->kg_user_pri = newpriority;
}
FOREACH_THREAD_IN_GROUP(kg, td) {
maybe_resched(td);
maybe_resched(td); /* XXXKSE silly */
}
mtx_unlock_spin(&sched_lock);
}
@ -865,20 +981,21 @@ loadav(void *arg)
int i, nrun;
struct loadavg *avg;
struct proc *p;
struct ksegrp *kg;
struct thread *td;
avg = &averunnable;
sx_slock(&allproc_lock);
nrun = 0;
FOREACH_PROC_IN_SYSTEM(p) {
FOREACH_KSEGRP_IN_PROC(p, kg) {
switch (p->p_stat) {
case SRUN:
FOREACH_THREAD_IN_PROC(p, td) {
switch (td->td_state) {
case TDS_RUNQ:
case TDS_RUNNING:
if ((p->p_flag & P_NOLOAD) != 0)
goto nextproc;
/* FALLTHROUGH */
case SIDL:
nrun++;
nrun++; /* XXXKSE */
default:
break;
}
nextproc:
continue;
@ -932,19 +1049,18 @@ void
schedclock(td)
struct thread *td;
{
struct kse *ke = td->td_kse;
struct ksegrp *kg = td->td_ksegrp;
struct kse *ke;
struct ksegrp *kg;
if (td) {
ke->ke_cpticks++;
kg->kg_estcpu = ESTCPULIM(kg->kg_estcpu + 1);
if ((kg->kg_estcpu % INVERSE_ESTCPU_WEIGHT) == 0) {
resetpriority(td->td_ksegrp);
if (td->td_priority >= PUSER)
td->td_priority = kg->kg_user_pri;
}
} else {
panic("schedclock");
KASSERT((td != NULL), ("schedlock: null thread pointer"));
ke = td->td_kse;
kg = td->td_ksegrp;
ke->ke_cpticks++;
kg->kg_estcpu = ESTCPULIM(kg->kg_estcpu + 1);
if ((kg->kg_estcpu % INVERSE_ESTCPU_WEIGHT) == 0) {
resetpriority(kg);
if (td->td_priority >= PUSER)
td->td_priority = kg->kg_user_pri;
}
}
@ -959,7 +1075,6 @@ yield(struct thread *td, struct yield_args *uap)
mtx_assert(&Giant, MA_NOTOWNED);
mtx_lock_spin(&sched_lock);
td->td_priority = PRI_MAX_TIMESHARE;
setrunqueue(td);
kg->kg_proc->p_stats->p_ru.ru_nvcsw++;
mi_switch();
mtx_unlock_spin(&sched_lock);

27
sys/kern/ksched.c
View File

@ -181,7 +181,18 @@ int ksched_setscheduler(register_t *ret, struct ksched *ksched,
mtx_lock_spin(&sched_lock);
rtp_to_pri(&rtp, kg);
td->td_last_kse->ke_flags |= KEF_NEEDRESCHED; /* XXXKSE */
FOREACH_THREAD_IN_GROUP(kg, td) { /* XXXKSE */
if (td->td_state == TDS_RUNNING) {
td->td_kse->ke_flags |= KEF_NEEDRESCHED;
} else if (td->td_state == TDS_RUNQ) {
if (td->td_priority > kg->kg_user_pri) {
remrunqueue(td);
td->td_priority =
kg->kg_user_pri;
setrunqueue(td);
}
}
}
mtx_unlock_spin(&sched_lock);
}
else
@ -203,7 +214,19 @@ int ksched_setscheduler(register_t *ret, struct ksched *ksched,
* on the scheduling code: You must leave the
* scheduling info alone.
*/
td->td_last_kse->ke_flags |= KEF_NEEDRESCHED; /* XXXKSE */
FOREACH_THREAD_IN_GROUP(kg, td) {
if (td->td_state == TDS_RUNNING) {
td->td_kse->ke_flags |= KEF_NEEDRESCHED;
} else if (td->td_state == TDS_RUNQ) {
if (td->td_priority > kg->kg_user_pri) {
remrunqueue(td);
td->td_priority =
kg->kg_user_pri;
setrunqueue(td);
}
}
}
mtx_unlock_spin(&sched_lock);
}
break;

4
sys/kern/subr_smp.c
View File

@ -124,8 +124,8 @@ forward_signal(struct thread *td)
* executing so that it executes ast().
*/
mtx_assert(&sched_lock, MA_OWNED);
KASSERT(td->td_proc->p_stat == SRUN,
("forward_signal: process is not SRUN"));
KASSERT(td->td_state == TDS_RUNNING,
("forward_signal: thread is not TDS_RUNNING"));
CTR1(KTR_SMP, "forward_signal(%p)", td->td_proc);

37
sys/kern/subr_trap.c
View File

@ -48,6 +48,8 @@
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/kse.h>
#include <sys/ktr.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/systm.h>
@ -71,13 +73,15 @@ userret(td, frame, oticks)
struct kse *ke = td->td_kse;
struct ksegrp *kg = td->td_ksegrp;
CTR3(KTR_SYSC, "userret: thread %p (pid %d, %s)", td, p->p_pid,
p->p_comm);
#ifdef INVARIANTS
/* Check that we called signotify() enough. */
mtx_lock(&Giant);
PROC_LOCK(p);
mtx_lock_spin(&sched_lock);
if (SIGPENDING(p) && ((p->p_sflag & PS_NEEDSIGCHK) == 0 ||
(p->p_kse.ke_flags & KEF_ASTPENDING) == 0))
(ke->ke_flags & KEF_ASTPENDING) == 0))
printf("failed to set signal flags proprly for ast()\n");
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(p);
@ -99,6 +103,22 @@ userret(td, frame, oticks)
mtx_unlock_spin(&sched_lock);
}
/*
* We need to check to see if we have to exit or wait due to a
* single threading requirement or some other STOP condition.
*/
PROC_LOCK(p);
thread_suspend_check(0); /* Can suspend or kill */
PROC_UNLOCK(p);
/*
* DO special thread processing, e.g. upcall tweaking and such
*/
if (p->p_flag & P_KSES) {
thread_userret(p, kg, ke, td, frame);
/* printf("KSE thread returned"); */
}
/*
* Charge system time if profiling.
*
@ -121,8 +141,7 @@ userret(td, frame, oticks)
* This function will return with preemption disabled.
*/
void
ast(framep)
struct trapframe *framep;
ast(struct trapframe *framep)
{
struct thread *td = curthread;
struct proc *p = td->td_proc;
@ -136,6 +155,8 @@ ast(framep)
int ucode;
#endif
CTR3(KTR_SYSC, "ast: thread %p (pid %d, %s)", td, p->p_pid,
p->p_comm);
KASSERT(TRAPF_USERMODE(framep), ("ast in kernel mode"));
#ifdef WITNESS
if (witness_list(td))
@ -164,6 +185,13 @@ ast(framep)
p->p_stats->p_prof.pr_ticks = 0;
}
mtx_unlock_spin(&sched_lock);
/*
* XXXKSE While the fact that we owe a user profiling
* tick is stored per KSE in this code, the statistics
* themselves are still stored per process.
* This should probably change, by which I mean that
* possibly the location of both might change.
*/
if (td->td_ucred != p->p_ucred)
cred_update_thread(td);
@ -192,14 +220,13 @@ ast(framep)
if (flags & KEF_NEEDRESCHED) {
mtx_lock_spin(&sched_lock);
td->td_priority = kg->kg_user_pri;
setrunqueue(td);
p->p_stats->p_ru.ru_nivcsw++;
mi_switch();
mtx_unlock_spin(&sched_lock);
}
if (sflag & PS_NEEDSIGCHK) {
PROC_LOCK(p);
while ((sig = cursig(p)) != 0)
while ((sig = cursig(td)) != 0)
postsig(sig);
PROC_UNLOCK(p);
}

31
sys/kern/subr_turnstile.c
View File

@ -119,23 +119,20 @@ propagate_priority(struct thread *td)
return;
}
KASSERT(td->td_state != TDS_SURPLUS, ("Mutex owner SURPLUS"));
MPASS(td->td_proc != NULL);
MPASS(td->td_proc->p_magic == P_MAGIC);
KASSERT(td->td_proc->p_stat != SSLEEP, ("sleeping thread owns a mutex"));
KASSERT(td->td_state != TDS_SLP,
("sleeping thread owns a mutex"));
if (td->td_priority <= pri) /* lower is higher priority */
return;
/*
* Bump this thread's priority.
*/
td->td_priority = pri;
/*
* If lock holder is actually running, just bump priority.
*/
if (thread_running(td)) {
MPASS(td->td_proc->p_stat == SRUN
|| td->td_proc->p_stat == SZOMB
|| td->td_proc->p_stat == SSTOP);
if (td->td_state == TDS_RUNNING) {
td->td_priority = pri;
return;
}
@ -151,20 +148,26 @@ propagate_priority(struct thread *td)
* If on run queue move to new run queue, and quit.
* XXXKSE this gets a lot more complicated under threads
* but try anyhow.
* We should have a special call to do this more efficiently.
*/
if (td->td_proc->p_stat == SRUN) {
if (td->td_state == TDS_RUNQ) {
MPASS(td->td_blocked == NULL);
remrunqueue(td);
td->td_priority = pri;
setrunqueue(td);
return;
}
/*
* Adjust for any other cases.
*/
td->td_priority = pri;
/*
* If we aren't blocked on a mutex, we should be.
*/
KASSERT(td->td_proc->p_stat == SMTX, (
KASSERT(td->td_state == TDS_MTX, (
"process %d(%s):%d holds %s but isn't blocked on a mutex\n",
td->td_proc->p_pid, td->td_proc->p_comm, td->td_proc->p_stat,
td->td_proc->p_pid, td->td_proc->p_comm, td->td_state,
m->mtx_object.lo_name));
/*
@ -590,7 +593,7 @@ _mtx_lock_sleep(struct mtx *m, int opts, const char *file, int line)
*/
td->td_blocked = m;
td->td_mtxname = m->mtx_object.lo_name;
td->td_proc->p_stat = SMTX;
td->td_state = TDS_MTX;
propagate_priority(td);
if (LOCK_LOG_TEST(&m->mtx_object, opts))
@ -727,7 +730,6 @@ _mtx_unlock_sleep(struct mtx *m, int opts, const char *file, int line)
m, td1);
td1->td_blocked = NULL;
td1->td_proc->p_stat = SRUN;
setrunqueue(td1);
if (td->td_critnest == 1 && td1->td_priority < pri) {
@ -744,7 +746,6 @@ _mtx_unlock_sleep(struct mtx *m, int opts, const char *file, int line)
}
}
#endif
setrunqueue(td);
if (LOCK_LOG_TEST(&m->mtx_object, opts))
CTR2(KTR_LOCK,
"_mtx_unlock_sleep: %p switching out lock=%p", m,

1
sys/kern/subr_witness.c
View File

@ -225,6 +225,7 @@ static struct witness_order_list_entry order_lists[] = {
#endif
{ "clk", &lock_class_mtx_spin },
{ "mutex profiling lock", &lock_class_mtx_spin },
{ "zombie_thread_lock", &lock_class_mtx_spin },
{ NULL, NULL },
{ NULL, NULL }
};

2
sys/kern/sys_generic.c
View File

@ -1187,7 +1187,7 @@ selwakeup(sip)
sip->si_thread = NULL;
mtx_lock_spin(&sched_lock);
if (td->td_wchan == (caddr_t)&selwait) {
if (td->td_proc->p_stat == SSLEEP)
if (td->td_state == TDS_SLP)
setrunnable(td);
else
cv_waitq_remove(td);

6
sys/kern/sys_process.c
View File

@ -467,7 +467,7 @@ ptrace(struct thread *td, struct ptrace_args *uap)
}
/* not currently stopped */
if (p->p_stat != SSTOP || (p->p_flag & P_WAITED) == 0) {
if (!P_SHOULDSTOP(p) || (p->p_flag & P_WAITED) == 0) {
error = EBUSY;
goto fail;
}
@ -566,10 +566,12 @@ ptrace(struct thread *td, struct ptrace_args *uap)
if (proctree_locked)
sx_xunlock(&proctree_lock);
/* deliver or queue signal */
if (p->p_stat == SSTOP) {
if (P_SHOULDSTOP(p)) {
p->p_xstat = uap->data;
mtx_lock_spin(&sched_lock);
p->p_flag &= ~(P_STOPPED_TRACE|P_STOPPED_SGNL);
setrunnable(td2); /* XXXKSE */
/* Need foreach kse in proc, ... make_kse_queued(). */
mtx_unlock_spin(&sched_lock);
} else if (uap->data)
psignal(p, uap->data);

2
sys/kern/syscalls.master
View File

@ -552,7 +552,7 @@
381 STD BSD { int kse_new(struct kse_mailbox * mbx, \
int new_grp_flag); }
382 STD BSD { int thread_wakeup(struct thread_mailbox *tmbx); }
383 STD BSD { int kse_yield(void); }
383 MSTD BSD { int kse_yield(void); }
384 UNIMPL BSD __mac_get_proc
385 UNIMPL BSD __mac_set_proc
386 UNIMPL BSD __mac_get_fd

53
sys/kern/tty.c
View File

@ -2392,17 +2392,35 @@ ttyinfo(struct tty *tp)
PGRP_UNLOCK(tp->t_pgrp);
td = FIRST_THREAD_IN_PROC(pick);
stmp = pick->p_stat == SRUN ? "running" : /* XXXKSE */
pick->p_stat == SMTX ? td->td_mtxname :
td->td_wmesg ? td->td_wmesg : "iowait";
if (pick->p_flag & P_KSES) {
stmp = "KSE" ; /* XXXKSE */
} else {
if (td) {
if (td->td_state == TDS_RUNQ) {
stmp = "running";
} else if (td->td_state == TDS_MTX) {
stmp = td->td_mtxname;
} else if (td->td_wmesg) {
stmp = td->td_wmesg;
} else {
stmp = "iowait";
}
} else {
stmp = "threadless";
panic("ttyinfo: no thread!?");
}
}
calcru(pick, &utime, &stime, NULL);
ltmp = pick->p_stat == SIDL || pick->p_stat == SWAIT ||
pick->p_stat == SZOMB ? 0 :
pgtok(vmspace_resident_count(pick->p_vmspace));
ltmp = ((pick->p_state == PRS_NEW)
|| (td && (td->td_state == TDS_IWAIT))
|| (pick->p_state == PRS_ZOMBIE ? 0 :
pgtok(vmspace_resident_count(pick->p_vmspace))));
mtx_unlock_spin(&sched_lock);
ttyprintf(tp, " cmd: %s %d [%s%s] ", pick->p_comm,
pick->p_pid, pick->p_stat == SMTX ? "*" : "", stmp);
pick->p_pid,
td->td_state == TDS_MTX ? "*" : "",
stmp);
/* Print user time. */
ttyprintf(tp, "%ld.%02ldu ",
@ -2433,7 +2451,19 @@ ttyinfo(struct tty *tp)
* we pick out just "short-term" sleepers (P_SINTR == 0).
* 4) Further ties are broken by picking the highest pid.
*/
#define ISRUN(p) (((p)->p_stat == SRUN) || ((p)->p_stat == SIDL))
#define ISRUN(p, val) \
do { \
struct thread *td; \
val = 0; \
FOREACH_THREAD_IN_PROC(p, td) { \
if (td->td_state == TDS_RUNQ || \
td->td_state == TDS_RUNNING) { \
val = 1; \
break; \
} \
} \
} while (0)
#define TESTAB(a, b) ((a)<<1 | (b))
#define ONLYA 2
#define ONLYB 1
@ -2449,10 +2479,13 @@ proc_compare(struct proc *p1, struct proc *p2)
if (p1 == NULL)
return (1);
ISRUN(p1, esta);
ISRUN(p2, estb);
/*
* see if at least one of them is runnable
*/
switch (TESTAB(ISRUN(p1), ISRUN(p2))) {
switch (TESTAB(esta, estb)) {
case ONLYA:
return (0);
case ONLYB:
@ -2477,7 +2510,7 @@ proc_compare(struct proc *p1, struct proc *p2)
/*
* weed out zombies
*/
switch (TESTAB(p1->p_stat == SZOMB, p2->p_stat == SZOMB)) {
switch (TESTAB(p1->p_state == PRS_ZOMBIE, p2->p_state == PRS_ZOMBIE)) {
case ONLYA:
return (1);
case ONLYB:

27
sys/posix4/ksched.c
View File

@ -181,7 +181,18 @@ int ksched_setscheduler(register_t *ret, struct ksched *ksched,
mtx_lock_spin(&sched_lock);
rtp_to_pri(&rtp, kg);
td->td_last_kse->ke_flags |= KEF_NEEDRESCHED; /* XXXKSE */
FOREACH_THREAD_IN_GROUP(kg, td) { /* XXXKSE */
if (td->td_state == TDS_RUNNING) {
td->td_kse->ke_flags |= KEF_NEEDRESCHED;
} else if (td->td_state == TDS_RUNQ) {
if (td->td_priority > kg->kg_user_pri) {
remrunqueue(td);
td->td_priority =
kg->kg_user_pri;
setrunqueue(td);
}
}
}
mtx_unlock_spin(&sched_lock);
}
else
@ -203,7 +214,19 @@ int ksched_setscheduler(register_t *ret, struct ksched *ksched,
* on the scheduling code: You must leave the
* scheduling info alone.
*/
td->td_last_kse->ke_flags |= KEF_NEEDRESCHED; /* XXXKSE */
FOREACH_THREAD_IN_GROUP(kg, td) {
if (td->td_state == TDS_RUNNING) {
td->td_kse->ke_flags |= KEF_NEEDRESCHED;
} else if (td->td_state == TDS_RUNQ) {
if (td->td_priority > kg->kg_user_pri) {
remrunqueue(td);
td->td_priority =
kg->kg_user_pri;
setrunqueue(td);
}
}
}
mtx_unlock_spin(&sched_lock);
}
break;

2
sys/sparc64/sparc64/genassym.c
View File

@ -232,6 +232,8 @@ ASSYM(TD_KSE, offsetof(struct thread, td_kse));
ASSYM(TD_KSTACK, offsetof(struct thread, td_kstack));
ASSYM(TD_PCB, offsetof(struct thread, td_pcb));
ASSYM(TD_PROC, offsetof(struct thread, td_proc));
ASSYM(TD_STATE, offsetof(struct thread, td_state));
ASSYM(TDS_RUNNING, TDS_RUNNING);
ASSYM(PCB_SIZEOF, sizeof(struct pcb));
ASSYM(PCB_FPSTATE, offsetof(struct pcb, pcb_fpstate));

3
sys/sparc64/sparc64/swtch.S
View File

@ -109,6 +109,9 @@ ENTRY(cpu_switch)
stx %o0, [PCPU(CURTHREAD)]
stx %o1, [PCPU(CURPCB)]
mov TDS_RUNNING, %o2
stw %o2, [%o0 + TD_STATE]
SET(sched_lock, %o3, %o2)
stx %o0, [%o2 + MTX_LOCK]

3
sys/sparc64/sparc64/swtch.s
View File

@ -109,6 +109,9 @@ ENTRY(cpu_switch)
stx %o0, [PCPU(CURTHREAD)]
stx %o1, [PCPU(CURPCB)]
mov TDS_RUNNING, %o2
stw %o2, [%o0 + TD_STATE]
SET(sched_lock, %o3, %o2)
stx %o0, [%o2 + MTX_LOCK]

33
sys/sparc64/sparc64/trap.c
View File

@ -49,6 +49,7 @@
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/ktr.h>
#include <sys/kse.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/systm.h>
@ -190,6 +191,11 @@ trap(struct trapframe *tf)
td->td_frame = tf;
if (td->td_ucred != p->p_ucred)
cred_update_thread(td);
if ((p->p_flag & P_WEXIT) && (p->p_singlethread != td)) {
mtx_lock_spin(&sched_lock);
thread_exit();
/* NOTREACHED */
}
} else {
sticks = 0;
if ((type & ~T_KERNEL) != T_BREAKPOINT)
@ -528,6 +534,23 @@ syscall(struct trapframe *tf)
td->td_frame = tf;
if (td->td_ucred != p->p_ucred)
cred_update_thread(td);
if (p->p_flag & P_KSES) {
/*
* If we are doing a syscall in a KSE environment,
* note where our mailbox is. There is always the
* possibility that we could do this lazily (in sleep()),
* but for now do it every time.
*/
td->td_mailbox = (void *)fuword((caddr_t)td->td_kse->ke_mailbox
+ offsetof(struct kse_mailbox, kmbx_current_thread));
if ((td->td_mailbox == NULL) ||
(td->td_mailbox == (void *)-1)) {
td->td_mailbox = NULL; /* single thread it.. */
td->td_flags &= ~TDF_UNBOUND;
} else {
td->td_flags |= TDF_UNBOUND;
}
}
code = tf->tf_global[1];
/*
@ -633,11 +656,6 @@ syscall(struct trapframe *tf)
break;
}
/*
* Handle reschedule and other end-of-syscall issues
*/
userret(td, tf, sticks);
/*
* Release Giant if we had to get it. Don't use mtx_owned(),
* we want to catch broken syscalls.
@ -645,6 +663,11 @@ syscall(struct trapframe *tf)
if ((callp->sy_narg & SYF_MPSAFE) == 0)
mtx_unlock(&Giant);
/*
* Handle reschedule and other end-of-syscall issues
*/
userret(td, tf, sticks);
#ifdef KTRACE
if (KTRPOINT(td, KTR_SYSRET))
ktrsysret(code, error, td->td_retval[0]);

36
sys/sparc64/sparc64/vm_machdep.c
View File

@ -108,6 +108,42 @@ cpu_sched_exit(struct thread *td)
}
}
void
cpu_thread_exit(struct thread *td)
{
}
void
cpu_thread_setup(struct thread *td)
{
}
void
cpu_save_upcall(struct thread *td, struct kse *newkse)
{
}
void
cpu_set_upcall(struct thread *td, void *pcb)
{
}
void
cpu_set_args(struct thread *td, struct kse *ke)
{
}
void
cpu_free_kse_mdstorage(struct kse *ke)
{
}
int
cpu_export_context(struct thread *td)
{
return (0);
}
/*
* Finish a fork operation, with process p2 nearly set up.
* Copy and update the pcb, set up the stack so that the child

1
sys/sys/condvar.h
View File

@ -62,6 +62,7 @@ void cv_signal(struct cv *cvp);
void cv_broadcast(struct cv *cvp);
void cv_waitq_remove(struct thread *td);
void cv_abort(struct thread *td);
#define cv_waitq_empty(cvp) (TAILQ_EMPTY(&(cvp)->cv_waitq))
#define cv_wmesg(cvp) ((cvp)->cv_description)

193
sys/sys/proc.h
View File

@ -249,12 +249,13 @@ They would be given priorities calculated from the KSEG.
* This is what is put to sleep and reactivated.
* The first KSE available in the correct group will run this thread.
* If several are available, use the one on the same CPU as last time.
* When waing to be run, threads are hung off the KSEGRP in priority order.
* with N runnable and queued KSEs in the KSEGRP, the first N threads
* are linked to them. Other threads are not yet assigned.
*/
struct thread {
struct proc *td_proc; /* Associated process. */
struct ksegrp *td_ksegrp; /* Associated KSEG. */
struct kse *td_last_kse; /* Where it wants to be if possible. */
struct kse *td_kse; /* Current KSE if running. */
TAILQ_ENTRY(thread) td_plist; /* All threads in this proc */
TAILQ_ENTRY(thread) td_kglist; /* All threads in this ksegrp */
@ -267,6 +268,8 @@ struct thread {
#define td_startzero td_flags
int td_flags; /* (j) TDF_* flags. */
struct kse *td_last_kse; /* Where it wants to be if possible. */
struct kse *td_kse; /* Current KSE if running. */
int td_dupfd; /* (k) Ret value from fdopen. XXX */
void *td_wchan; /* (j) Sleep address. */
const char *td_wmesg; /* (j) Reason for sleep. */
@ -280,6 +283,8 @@ struct thread {
LIST_HEAD(, mtx) td_contested; /* (j) Contested locks. */
struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
int td_intr_nesting_level; /* (k) Interrupt recursion. */
void *td_mailbox; /* the userland mailbox address */
struct ucred *td_ucred; /* (k) Reference to credentials. */
#define td_endzero td_md
#define td_startcopy td_endzero
@ -290,14 +295,44 @@ struct thread {
u_char td_priority; /* (j) Thread active priority. */
#define td_endcopy td_pcb
struct ucred *td_ucred; /* (k) Reference to credentials. */
struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
enum {
TDS_NEW = 0x20,
TDS_UNQUEUED,
TDS_SLP,
TDS_MTX,
TDS_RUNQ,
TDS_RUNNING,
TDS_SUSPENDED, /* would have liked to have run */
TDS_IWAIT,
TDS_SURPLUS
} td_state;
struct callout td_slpcallout; /* (h) Callout for sleep. */
struct trapframe *td_frame; /* (k) */
struct vm_object *td_kstack_obj;/* (a) Kstack object. */
vm_offset_t td_kstack; /* Kernel VA of kstack. */
u_int td_critnest; /* (k) Critical section nest level. */
};
/* flags kept in td_flags */
#define TDF_UNBOUND 0x000001 /* may give away the kse, uses the kg runq */
#define TDF_SINTR 0x000008 /* Sleep is interruptible. */
#define TDF_TIMEOUT 0x000010 /* Timing out during sleep. */
#define TDF_SELECT 0x000040 /* Selecting; wakeup/waiting danger. */
#define TDF_CVWAITQ 0x000080 /* Thread is on a cv_waitq (not slpq). */
#define TDF_UPCALLING 0x000100 /* This thread is doing an upcall. */
#define TDF_INMSLEEP 0x000400 /* Don't recurse in msleep() */
#define TDF_TIMOFAIL 0x001000 /* Timeout from sleep after we were awake. */
#define TDF_DEADLKTREAT 0x800000 /* Lock aquisition - deadlock treatment. */
/*
* Traps for young players:
* The main thread flag that controls whether a thread acts as a threaded
* or unthreaded thread is the TDF_UNBOUND flag.
* UPCALLS run with the UNBOUND flags clear, after they are first scheduled.
* i.e. they bind themselves to whatever thread thay are first scheduled with.
* You may see BOUND threads in KSE processes but you should never see
* UNBOUND threads in non KSE processes.
*/
/*
* The schedulable entity that can be given a context to run.
@ -309,14 +344,14 @@ struct thread {
struct kse {
struct proc *ke_proc; /* Associated process. */
struct ksegrp *ke_ksegrp; /* Associated KSEG. */
struct thread *ke_thread; /* Associated thread, if running. */
TAILQ_ENTRY(kse) ke_kglist; /* Queue of all KSEs in ke_ksegrp. */
TAILQ_ENTRY(kse) ke_kgrlist; /* Queue of all KSEs in this state. */
TAILQ_ENTRY(kse) ke_procq; /* (j) Run queue. */
TAILQ_HEAD(, thread) ke_runq; /* (td_runq) RUNNABLE bound to KSE. */
#define ke_startzero ke_flags
int ke_flags; /* (j) KEF_* flags. */
struct thread *ke_thread; /* Active associated thread. */
struct thread *ke_bound; /* Thread bound to this KSE (*) */
/*u_int ke_estcpu; */ /* (j) Time averaged val of cpticks. */
int ke_cpticks; /* (j) Ticks of cpu time. */
fixpt_t ke_pctcpu; /* (j) %cpu during p_swtime. */
@ -329,15 +364,45 @@ struct kse {
u_char ke_oncpu; /* (j) Which cpu we are on. */
u_int ke_slptime; /* (j) Time since last idle. */
char ke_rqindex; /* (j) Run queue index. */
#define ke_endzero ke_priority
enum {
KES_IDLE = 0x10,
KES_ONRUNQ,
KES_UNQUEUED, /* in transit */
KES_RUNNING
} ke_state; /* (j) S* process status. */
void *ke_mailbox; /* the userland mailbox address */
struct thread *ke_tdspare; /* spare thread for upcalls */
#define ke_endzero ke_dummy
#define ke_startcopy ke_endzero
u_char ke_priority; /* (j) Process priority. */
u_char ke_usrpri; /* (j) User pri from cpu & nice. */
#define ke_endcopy ke_end
u_char ke_dummy; /* */
#define ke_endcopy ke_mdstorage
int ke_end; /* dummy entry */
void *ke_upcall;
void *ke_stackbase;
u_long ke_stacksize;
void *ke_mdstorage; /* where we store the pcb and frame */
struct pcb *ke_pcb; /* the pcb saved for the upcalls */
struct trapframe *ke_frame; /* the upcall trapframe */
void *mdkse; /* eventually you load from this in */
/* switch for our extension PCB x86 */
};
/* flags kept in ke_flags */
#define KEF_OWEUPC 0x00002 /* Owe process an addupc() call at next ast. */
#define KEF_IDLEKSE 0x00004 /* A 'Per CPU idle process'.. has one thread */
#define KEF_LOANED 0x00004 /* On loan from the bound thread to another */
#define KEF_ASTPENDING 0x00400 /* KSE has a pending ast. */
#define KEF_NEEDRESCHED 0x00800 /* Process needs to yield. */
/*
* (*) A bound KSE with a bound thread in a KSE process may be lent to
* Other threads, as long as those threads do not leave the kernel.
* The other threads must be either exiting, or be unbound with a valid
* mailbox so that they can save their state there rather than going
* to user space. While this happens the real bound thread is still linked
* to the kse via the ke_bound field, and the KSE has its "KEF_LOANED
* flag set.
*/
/*
* Kernel-scheduled entity group (KSEG). The scheduler considers each KSEG to
@ -348,27 +413,29 @@ struct ksegrp {
struct proc *kg_proc; /* Process that contains this KSEG. */
TAILQ_ENTRY(ksegrp) kg_ksegrp; /* Queue of KSEGs in kg_proc. */
TAILQ_HEAD(, kse) kg_kseq; /* (ke_kglist) All KSEs. */
TAILQ_HEAD(, kse) kg_rq; /* (ke_kgrlist) Runnable KSEs. */
TAILQ_HEAD(, kse) kg_iq; /* (ke_kgrlist) Idle KSEs. */
TAILQ_HEAD(, thread) kg_threads;/* (td_kglist) All threads. */
TAILQ_HEAD(, thread) kg_runq; /* (td_runq) Unbound RUNNABLE threads */
TAILQ_HEAD(, thread) kg_runq; /* (td_runq) waiting RUNNABLE threads */
TAILQ_HEAD(, thread) kg_slpq; /* (td_runq) NONRUNNABLE threads. */
#define kg_startzero kg_estcpu
u_int kg_estcpu; /* Sum of the same field in KSEs. */
u_int kg_slptime; /* (j) How long completely blocked. */
struct thread *kg_last_assigned; /* Last thread assigned to a KSE */
int kg_numthreads; /* Num threads in total */
int kg_runnable; /* Num runnable threads on queue. */
int kg_kses; /* Num KSEs in group. */
int kg_runq_kses; /* Num KSEs on runq. */
int kg_idle_kses; /* num KSEs idle */
#define kg_endzero kg_pri_class
#define kg_startcopy kg_endzero
u_char kg_pri_class; /* (j) Scheduling class. */
u_char kg_user_pri; /* (j) User pri from estcpu and nice. */
char kg_nice; /* (j?/k?) Process "nice" value. */
struct rtprio kg_rtprio; /* (j) Realtime priority. */
#define kg_endcopy kg_runnable
int kg_runnable; /* Num runnable threads on queue. */
int kg_runq_kses; /* Num KSEs on runq. */
int kg_kses; /* Num KSEs in group. */
/* struct rtprio kg_rtprio; */ /* (j) Realtime priority. */
#define kg_endcopy kg_dummy
int kg_dummy;
};
/*
@ -379,6 +446,7 @@ struct proc {
LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
TAILQ_HEAD(, ksegrp) p_ksegrps; /* (kg_ksegrp) All KSEGs. */
TAILQ_HEAD(, thread) p_threads; /* (td_plist) Threads. (shortcut) */
TAILQ_HEAD(, thread) p_suspended; /* (td_runq) suspended threads */
struct ucred *p_ucred; /* (c) Process owner's identity. */
struct filedesc *p_fd; /* (b) Ptr to open files structure. */
/* Accumulated stats for all KSEs? */
@ -389,7 +457,6 @@ struct proc {
struct ksegrp p_ksegrp;
struct kse p_kse;
struct thread p_xxthread;
/*
* The following don't make too much sense..
@ -397,8 +464,12 @@ struct proc {
*/
int p_flag; /* (c) P_* flags. */
int p_sflag; /* (j) PS_* flags. */
int p_stat; /* (j) S* process status. */
enum {
PRS_NEW = 0, /* In creation */
PRS_NORMAL, /* KSEs can be run */
PRS_WAIT, /* Waiting on interrupt ? */
PRS_ZOMBIE
} p_state; /* (j) S* process status. */
pid_t p_pid; /* (b) Process identifier. */
LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
@ -431,6 +502,10 @@ struct proc {
u_char p_pfsflags; /* (c) Procfs flags. */
struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
void *p_aioinfo; /* (c) ASYNC I/O info. */
int p_numthreads; /* (?) number of threads */
int p_numksegrps; /* (?) number of ksegrps */
struct thread *p_singlethread;/* If single threading this is it */
int p_suspcount; /* # waiting threads in suspended mode*/
/* End area that is zeroed on creation. */
#define p_startcopy p_sigmask
@ -467,13 +542,6 @@ struct proc {
#define NOCPU 0xff /* For p_oncpu when we aren't on a CPU. */
/* Status values (p_stat). */
#define SIDL 1 /* Process being created by fork. */
#define SRUN 2 /* Currently runnable. */
#define SSLEEP 3 /* Sleeping on an address. */
#define SSTOP 4 /* Process debugging or suspension. */
#define SZOMB 5 /* Awaiting collection by parent. */
#define SWAIT 6 /* Waiting for interrupt. */
#define SMTX 7 /* Blocked on a mutex. */
/* These flags are kept in p_flag. */
#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
@ -483,13 +551,21 @@ struct proc {
#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
#define P_SUGID 0x00100 /* Had set id privileges since last exec. */
#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
#define P_TRACED 0x00800 /* Debugged process being traced. */
#define P_WAITED 0x01000 /* Debugging process has waited for child. */
#define P_WAITED 0x01000 /* Someone is waiting for us */
#define P_WEXIT 0x02000 /* Working on exiting. */
#define P_EXEC 0x04000 /* Process called exec. */
#define P_KSES 0x08000 /* Process is using KSEs. */
#define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
/* flags that control how threads may be suspended for some reason */
#define P_STOPPED_SGNL 0x10000 /* Stopped due to SIGSTOP/SIGTSTP */
#define P_STOPPED_TRACE 0x20000 /* Stopped because of tracing */
#define P_STOPPED_SNGL 0x40000 /* Only one thread can continue (not to user) */
#define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait */
#define P_TRACED 0x00800 /* Debugged process being traced. */
#define P_STOPPED (P_STOPPED_SGNL|P_STOPPED_SNGL|P_STOPPED_TRACE)
#define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
/* Should be moved to machine-dependent areas. */
#define P_UNUSED100000 0x100000
#define P_COWINPROGRESS 0x400000 /* Snapshot copy-on-write in progress. */
@ -508,21 +584,14 @@ struct proc {
#define PS_SWAPPING 0x00200 /* Process is being swapped. */
#define PS_NEEDSIGCHK 0x02000 /* Process may need signal delivery. */
/* flags kept in td_flags */
#define TDF_ONRUNQ 0x00001 /* This KE is on a run queue */
#define TDF_SINTR 0x00008 /* Sleep is interruptible. */
#define TDF_TIMEOUT 0x00010 /* Timing out during sleep. */
#define TDF_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */
#define TDF_CVWAITQ 0x00080 /* Thread is on a cv_waitq (not slpq). */
#define TDF_TIMOFAIL 0x01000 /* Timeout from sleep after we were awake. */
#define TDF_DEADLKTREAT 0x800000 /* Lock aquisition - deadlock treatment. */
/* flags kept in ke_flags */
#define KEF_ONRUNQ 0x00001 /* This KE is on a run queue */
#define KEF_OWEUPC 0x00002 /* Owe process an addupc() call at next ast. */
#define KEF_ASTPENDING 0x00400 /* KSE has a pending ast. */
#define KEF_NEEDRESCHED 0x00800 /* Process needs to yield. */
/* used only in legacy conversion code */
#define SIDL 1 /* Process being created by fork. */
#define SRUN 2 /* Currently runnable. */
#define SSLEEP 3 /* Sleeping on an address. */
#define SSTOP 4 /* Process debugging or suspension. */
#define SZOMB 5 /* Awaiting collection by parent. */
#define SWAIT 6 /* Waiting for interrupt. */
#define SMTX 7 /* Blocked on a mutex. */
#define P_MAGIC 0xbeefface
@ -728,6 +797,7 @@ void pargs_drop(struct pargs *pa);
void pargs_free(struct pargs *pa);
void pargs_hold(struct pargs *pa);
void procinit(void);
void threadinit(void);
void proc_linkup(struct proc *p, struct ksegrp *kg,
struct kse *ke, struct thread *td);
void proc_reparent(struct proc *child, struct proc *newparent);
@ -758,7 +828,38 @@ void cpu_fork(struct thread *, struct proc *, struct thread *, int);
void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
void cpu_wait(struct proc *);
int cpu_coredump(struct thread *, struct vnode *, struct ucred *);
struct thread *thread_get(struct proc *);
/* New in KSE. */
struct thread *thread_alloc(void);
void thread_free(struct thread *td);
int cpu_export_context(struct thread *td);
void cpu_free_kse_mdstorage(struct kse *kse);
void cpu_save_upcall(struct thread *td, struct kse *newkse);
void cpu_set_args(struct thread *, struct kse *);
void cpu_set_upcall(struct thread *td, void *pcb);
void cpu_thread_exit(struct thread *);
void cpu_thread_setup(struct thread *td);
void kse_reassign(struct kse *ke);
void kse_link(struct kse *ke, struct ksegrp *kg);
void ksegrp_link(struct ksegrp *kg, struct proc *p);
int kserunnable(void);
void make_kse_runnable(struct kse *ke);
void thread_exit(void) __dead2;
int thread_export_context(struct thread *td);
void thread_link(struct thread *td, struct ksegrp *kg);
void thread_reap(void);
struct thread *thread_schedule_upcall(struct thread *td, struct kse *ke);
int thread_single(int how);
#define SNGLE_NO_EXIT 0 /* values for 'how' */
#define SNGLE_EXIT 1
void thread_single_end(void);
void thread_stash(struct thread *td);
int thread_suspend_check(int how);
void thread_unsuspend(struct proc *p);
int thread_userret(struct proc *p, struct ksegrp *kg, struct kse *ke,
struct thread *td, struct trapframe *frame);
void thread_sanity_check(struct thread *td);
#endif /* _KERNEL */
#endif /* !_SYS_PROC_H_ */

53
sys/sys/queue.h
View File

@ -102,6 +102,36 @@
* _REMOVE + + + +
*
*/
#define QUEUE_MACRO_DEBUG 1
#ifdef QUEUE_MACRO_DEBUG
struct qm_trace {
char * lastfile;
int lastline;
char * prevfile;
int prevline;
};
#define TRACEBUF struct qm_trace trace;
#define QMD_TRACE_HEAD(head) do { \
(head)->trace.prevline = (head)->trace.lastline; \
(head)->trace.prevfile = (head)->trace.lastfile; \
(head)->trace.lastline = __LINE__; \
(head)->trace.lastfile = __FILE__; \
} while (0)
#define QMD_TRACE_ELEM(elem) do { \
(elem)->trace.prevline = (elem)->trace.lastline; \
(elem)->trace.prevfile = (elem)->trace.lastfile; \
(elem)->trace.lastline = __LINE__; \
(elem)->trace.lastfile = __FILE__; \
} while (0)
#else
#define QMD_TRACE_ELEM(elem)
#define QMD_TRACE_HEAD(head)
#define TRACEBUF
#endif /* QUEUE_MACRO_DEBUG */
/*
* Singly-linked List declarations.
@ -329,6 +359,7 @@ struct { \
struct name { \
struct type *tqh_first; /* first element */ \
struct type **tqh_last; /* addr of last next element */ \
TRACEBUF \
}
#define TAILQ_HEAD_INITIALIZER(head) \
@ -338,6 +369,7 @@ struct name { \
struct { \
struct type *tqe_next; /* next element */ \
struct type **tqe_prev; /* address of previous next element */ \
TRACEBUF \
}
/*
@ -349,6 +381,8 @@ struct { \
(head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
(head1)->tqh_last = (head2)->tqh_last; \
TAILQ_INIT((head2)); \
QMD_TRACE_HEAD(head); \
QMD_TRACE_HEAD(head2); \
} \
} while (0)
@ -369,16 +403,21 @@ struct { \
#define TAILQ_INIT(head) do { \
TAILQ_FIRST((head)) = NULL; \
(head)->tqh_last = &TAILQ_FIRST((head)); \
QMD_TRACE_HEAD(head); \
} while (0)
#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
if ((TAILQ_NEXT((elm), field) = TAILQ_NEXT((listelm), field)) != NULL)\
TAILQ_NEXT((elm), field)->field.tqe_prev = \
&TAILQ_NEXT((elm), field); \
else \
else { \
(head)->tqh_last = &TAILQ_NEXT((elm), field); \
QMD_TRACE_HEAD(head); \
} \
TAILQ_NEXT((listelm), field) = (elm); \
(elm)->field.tqe_prev = &TAILQ_NEXT((listelm), field); \
QMD_TRACE_ELEM(&(elm)->field); \
QMD_TRACE_ELEM(&listelm->field); \
} while (0)
#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
@ -386,6 +425,8 @@ struct { \
TAILQ_NEXT((elm), field) = (listelm); \
*(listelm)->field.tqe_prev = (elm); \
(listelm)->field.tqe_prev = &TAILQ_NEXT((elm), field); \
QMD_TRACE_ELEM(&(elm)->field); \
QMD_TRACE_ELEM(&listelm->field); \
} while (0)
#define TAILQ_INSERT_HEAD(head, elm, field) do { \
@ -396,6 +437,8 @@ struct { \
(head)->tqh_last = &TAILQ_NEXT((elm), field); \
TAILQ_FIRST((head)) = (elm); \
(elm)->field.tqe_prev = &TAILQ_FIRST((head)); \
QMD_TRACE_HEAD(head); \
QMD_TRACE_ELEM(&(elm)->field); \
} while (0)
#define TAILQ_INSERT_TAIL(head, elm, field) do { \
@ -403,6 +446,8 @@ struct { \
(elm)->field.tqe_prev = (head)->tqh_last; \
*(head)->tqh_last = (elm); \
(head)->tqh_last = &TAILQ_NEXT((elm), field); \
QMD_TRACE_HEAD(head); \
QMD_TRACE_ELEM(&(elm)->field); \
} while (0)
#define TAILQ_LAST(head, headname) \
@ -417,9 +462,13 @@ struct { \
if ((TAILQ_NEXT((elm), field)) != NULL) \
TAILQ_NEXT((elm), field)->field.tqe_prev = \
(elm)->field.tqe_prev; \
else \
else { \
(head)->tqh_last = (elm)->field.tqe_prev; \
QMD_TRACE_HEAD(head); \
} \
*(elm)->field.tqe_prev = TAILQ_NEXT((elm), field); \
(elm)->field.tqe_next = (void *)-1; \
QMD_TRACE_ELEM(&(elm)->field); \
} while (0)

4
sys/sys/signalvar.h
View File

@ -234,10 +234,10 @@ extern struct mtx sigio_lock;
/*
* Machine-independent functions:
*/
int cursig(struct proc *p);
int cursig(struct thread *td);
void execsigs(struct proc *p);
void gsignal(int pgid, int sig);
int issignal(struct proc *p);
int issignal(struct thread *p);
void killproc(struct proc *p, char *why);
void pgsigio(struct sigio **, int signum, int checkctty);
void pgsignal(struct pgrp *pgrp, int sig, int checkctty);

1
sys/sys/systm.h
View File

@ -309,6 +309,7 @@ extern watchdog_tickle_fn wdog_tickler;
*/
int msleep(void *chan, struct mtx *mtx, int pri, const char *wmesg,
int timo);
void abortsleep(struct thread *td);
#define tsleep(chan, pri, wmesg, timo) msleep(chan, NULL, pri, wmesg, timo)
void wakeup(void *chan);
void wakeup_one(void *chan);

16
sys/sys/ucred.h
View File

@ -44,15 +44,15 @@
* Only the suser() or suser_cred() function should be used for this.
*/
struct ucred {
u_int cr_ref; /* reference count */
u_int cr_ref; /* reference count */
#define cr_startcopy cr_uid
uid_t cr_uid; /* effective user id */
uid_t cr_ruid; /* real user id */
uid_t cr_svuid; /* saved user id */
short cr_ngroups; /* number of groups */
gid_t cr_groups[NGROUPS]; /* groups */
gid_t cr_rgid; /* real group id */
gid_t cr_svgid; /* saved user id */
uid_t cr_uid; /* effective user id */
uid_t cr_ruid; /* real user id */
uid_t cr_svuid; /* saved user id */
short cr_ngroups; /* number of groups */
gid_t cr_groups[NGROUPS]; /* groups */
gid_t cr_rgid; /* real group id */
gid_t cr_svgid; /* saved user id */
struct uidinfo *cr_uidinfo; /* per euid resource consumption */
struct uidinfo *cr_ruidinfo; /* per ruid resource consumption */
struct prison *cr_prison; /* jail(4) */

2
sys/vm/uma_int.h
View File

@ -109,7 +109,7 @@
#define UMA_SLAB_MASK (PAGE_SIZE - 1) /* Mask to get back to the page */
#define UMA_SLAB_SHIFT PAGE_SHIFT /* Number of bits PAGE_MASK */
#define UMA_BOOT_PAGES 15 /* Number of pages allocated for startup */
#define UMA_BOOT_PAGES 30 /* Number of pages allocated for startup */
#define UMA_WORKING_TIME 20 /* Seconds worth of items to keep */

48
sys/vm/vm_glue.c
View File

@ -299,8 +299,11 @@ vm_waitproc(p)
GIANT_REQUIRED;
cpu_wait(p);
pmap_dispose_proc(p); /* drop per-process resources */
FOREACH_THREAD_IN_PROC(p, td)
/* XXXKSE by here there should not be any threads left! */
FOREACH_THREAD_IN_PROC(p, td) {
panic("vm_waitproc: Survivor thread!");
pmap_dispose_thread(td);
}
vmspace_exitfree(p); /* and clean-out the vmspace */
}
@ -355,7 +358,7 @@ faultin(p)
PROC_LOCK(p);
mtx_lock_spin(&sched_lock);
FOREACH_THREAD_IN_PROC (p, td)
if (td->td_proc->p_stat == SRUN) /* XXXKSE */
if (td->td_state == TDS_RUNQ) /* XXXKSE */
setrunqueue(td);
p->p_sflag |= PS_INMEM;
@ -371,7 +374,7 @@ faultin(p)
* is enough space for them. Of course, if a process waits for a long
* time, it will be swapped in anyway.
*
* XXXKSE - KSEGRP with highest priority counts..
* XXXKSE - process with the thread with highest priority counts..
*
* Giant is still held at this point, to be released in tsleep.
*/
@ -381,6 +384,7 @@ scheduler(dummy)
void *dummy;
{
struct proc *p;
struct thread *td;
int pri;
struct proc *pp;
int ppri;
@ -399,11 +403,14 @@ scheduler(dummy)
sx_slock(&allproc_lock);
FOREACH_PROC_IN_SYSTEM(p) {
struct ksegrp *kg;
if (p->p_sflag & (PS_INMEM | PS_SWAPPING)) {
continue;
}
mtx_lock_spin(&sched_lock);
if (p->p_stat == SRUN
&& (p->p_sflag & (PS_INMEM | PS_SWAPPING)) == 0) {
/* Find the minimum sleeptime for the process */
FOREACH_KSEGRP_IN_PROC(p, kg) {
FOREACH_THREAD_IN_PROC(p, td) {
/* Only consider runnable threads */
if (td->td_state == TDS_RUNQ) {
kg = td->td_ksegrp;
pri = p->p_swtime + kg->kg_slptime;
if ((p->p_sflag & PS_SWAPINREQ) == 0) {
pri -= kg->kg_nice * 8;
@ -438,6 +445,7 @@ scheduler(dummy)
/*
* We would like to bring someone in. (only if there is space).
* [What checks the space? ]
*/
PROC_LOCK(p);
faultin(p);
@ -478,6 +486,7 @@ swapout_procs(action)
int action;
{
struct proc *p;
struct thread *td;
struct ksegrp *kg;
struct proc *outp, *outp2;
int outpri, outpri2;
@ -489,13 +498,13 @@ int action;
outpri = outpri2 = INT_MIN;
retry:
sx_slock(&allproc_lock);
LIST_FOREACH(p, &allproc, p_list) {
FOREACH_PROC_IN_SYSTEM(p) {
struct vmspace *vm;
int minslptime = 100000;
PROC_LOCK(p);
if (p->p_lock != 0 ||
(p->p_flag & (P_TRACED|P_SYSTEM|P_WEXIT)) != 0) {
(p->p_flag & (P_STOPPED_SNGL|P_TRACED|P_SYSTEM|P_WEXIT)) != 0) {
PROC_UNLOCK(p);
continue;
}
@ -512,14 +521,15 @@ int action;
continue;
}
switch (p->p_stat) {
switch (p->p_state) {
default:
/* Don't swap out processes in any sort
* of 'special' state. */
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(p);
continue;
case SSLEEP:
case SSTOP:
case PRS_NORMAL:
/*
* do not swapout a realtime process
* Check all the thread groups..
@ -537,13 +547,18 @@ int action;
* Also guarantee swap_idle_threshold1
* time in memory.
*/
if (((FIRST_THREAD_IN_PROC(p)->td_priority) < PSOCK) ||
(kg->kg_slptime < swap_idle_threshold1)) {
if (kg->kg_slptime < swap_idle_threshold1) {
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(p);
goto nextproc;
}
FOREACH_THREAD_IN_PROC(p, td) {
if ((td->td_priority) < PSOCK) {
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(p);
goto nextproc;
}
}
/*
* If the system is under memory stress,
* or if we are swapping
@ -624,14 +639,13 @@ swapout(p)
p->p_sflag |= PS_SWAPPING;
PROC_UNLOCK(p);
FOREACH_THREAD_IN_PROC (p, td)
if (td->td_proc->p_stat == SRUN) /* XXXKSE */
if (td->td_state == TDS_RUNQ) /* XXXKSE */
remrunqueue(td); /* XXXKSE */
mtx_unlock_spin(&sched_lock);
pmap_swapout_proc(p);
FOREACH_THREAD_IN_PROC(p, td)
pmap_swapout_thread(td);
mtx_lock_spin(&sched_lock);
p->p_sflag &= ~PS_SWAPPING;
p->p_swtime = 0;

73
sys/vm/vm_meter.c
View File

@ -81,6 +81,7 @@ SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
static int
vmtotal(SYSCTL_HANDLER_ARGS)
{
/* XXXKSE almost completely broken */
struct proc *p;
struct vmtotal total, *totalp;
vm_map_entry_t entry;
@ -88,6 +89,7 @@ vmtotal(SYSCTL_HANDLER_ARGS)
vm_map_t map;
int paging;
struct ksegrp *kg;
struct thread *td;
totalp = &total;
bzero(totalp, sizeof *totalp);
@ -107,44 +109,49 @@ vmtotal(SYSCTL_HANDLER_ARGS)
if (p->p_flag & P_SYSTEM)
continue;
mtx_lock_spin(&sched_lock);
switch (p->p_stat) {
case 0:
mtx_unlock_spin(&sched_lock);
continue;
case SMTX:
case SSLEEP:
case SSTOP:
kg = &p->p_ksegrp; /* XXXKSE */
if (p->p_sflag & PS_INMEM) {
if (FIRST_THREAD_IN_PROC(p)->td_priority
<= PZERO)
totalp->t_dw++;
else if (kg->kg_slptime < maxslp)
totalp->t_sl++;
} else if (kg->kg_slptime < maxslp)
totalp->t_sw++;
if (kg->kg_slptime >= maxslp) {
mtx_unlock_spin(&sched_lock);
continue;
}
break;
case SWAIT:
totalp->t_sl++;
continue;
case SRUN:
case SIDL:
switch (p->p_state) {
case PRS_NEW:
if (p->p_sflag & PS_INMEM)
totalp->t_rq++;
else
totalp->t_sw++;
if (p->p_stat == SIDL) {
mtx_unlock_spin(&sched_lock);
continue;
}
mtx_unlock_spin(&sched_lock);
continue;
break;
default:
FOREACH_THREAD_IN_PROC(p, td) {
switch (td->td_state) {
case TDS_MTX:
case TDS_SLP:
kg = td->td_ksegrp; /* XXXKSE */
if (p->p_sflag & PS_INMEM) {
if (td->td_priority <= PZERO)
totalp->t_dw++;
else if (kg->kg_slptime
< maxslp)
totalp->t_sl++;
} else if (kg->kg_slptime < maxslp)
totalp->t_sw++;
if (kg->kg_slptime >= maxslp) {
continue;
}
break;
case TDS_RUNQ:
case TDS_RUNNING:
if (p->p_sflag & PS_INMEM)
totalp->t_rq++;
else
totalp->t_sw++;
continue;
case TDS_IWAIT:
totalp->t_sl++;
continue;
default:
break;
}
}
}
mtx_unlock_spin(&sched_lock);
/*

30
sys/vm/vm_pageout.c
View File

@ -642,6 +642,7 @@ vm_pageout_scan(int pass)
int vnodes_skipped = 0;
int maxlaunder;
int s;
struct thread *td;
GIANT_REQUIRED;
/*
@ -1123,7 +1124,8 @@ vm_pageout_scan(int pass)
bigproc = NULL;
bigsize = 0;
sx_slock(&allproc_lock);
LIST_FOREACH(p, &allproc, p_list) {
FOREACH_PROC_IN_SYSTEM(p) {
int breakout;
/*
* If this process is already locked, skip it.
*/
@ -1139,10 +1141,19 @@ vm_pageout_scan(int pass)
}
/*
* if the process is in a non-running type state,
* don't touch it.
* don't touch it. Check all the threads individually.
*/
mtx_lock_spin(&sched_lock);
if (p->p_stat != SRUN && p->p_stat != SSLEEP) {
breakout = 0;
FOREACH_THREAD_IN_PROC(p, td) {
if (td->td_state != TDS_RUNQ &&
td->td_state != TDS_RUNNING &&
td->td_state != TDS_SLP) {
breakout = 1;
break;
}
}
if (breakout) {
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(p);
continue;
@ -1445,6 +1456,8 @@ static void
vm_daemon()
{
struct proc *p;
int breakout;
struct thread *td;
mtx_lock(&Giant);
while (TRUE) {
@ -1473,7 +1486,16 @@ vm_daemon()
* don't touch it.
*/
mtx_lock_spin(&sched_lock);
if (p->p_stat != SRUN && p->p_stat != SSLEEP) {
breakout = 0;
FOREACH_THREAD_IN_PROC(p, td) {
if (td->td_state != TDS_RUNQ &&
td->td_state != TDS_RUNNING &&
td->td_state != TDS_SLP) {
breakout = 1;
break;
}
}
if (breakout) {
mtx_unlock_spin(&sched_lock);
continue;
}

1
sys/vm/vm_zeroidle.c
View File

@ -127,7 +127,6 @@ vm_pagezero(void)
pages += vm_page_zero_idle();
if (pages > idlezero_maxrun) {
mtx_lock_spin(&sched_lock);
setrunqueue(td);
td->td_proc->p_stats->p_ru.ru_nvcsw++;
mi_switch();
mtx_unlock_spin(&sched_lock);