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- Forward port flush of page table updates on context switch or userret

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- Forward port vfork XEN hack
This commit is contained in:
Kip Macy 2008-10-19 01:35:27 +00:00
parent dafc9be8f8
commit 50d6e42434
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=184042
3 changed files with 25 additions and 2 deletions
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9
sys/kern/kern_fork.c
View File

@ -117,10 +117,15 @@ vfork(td, uap)
struct thread *td;
struct vfork_args *uap;
{
int error;
int error, flags;
struct proc *p2;
error = fork1(td, RFFDG | RFPROC | RFPPWAIT | RFMEM, 0, &p2);
#ifdef XEN
flags = RFFDG | RFPROC; /* validate that this is still an issue */
#else
flags = RFFDG | RFPROC | RFPPWAIT | RFMEM;
#endif
error = fork1(td, flags, 0, &p2);
if (error == 0) {
td->td_retval[0] = p2->p_pid;
td->td_retval[1] = 0;

9
sys/kern/kern_synch.c
View File

@ -65,6 +65,12 @@ __FBSDID("$FreeBSD$");
#include <machine/cpu.h>
#ifdef XEN
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#endif
static void synch_setup(void *dummy);
SYSINIT(synch_setup, SI_SUB_KICK_SCHEDULER, SI_ORDER_FIRST, synch_setup,
NULL);
@ -431,6 +437,9 @@ mi_switch(int flags, struct thread *newtd)
"mi_switch: %p(%s) prio %d inhibit %d wmesg %s lock %s",
td, td->td_name, td->td_priority,
td->td_inhibitors, td->td_wmesg, td->td_lockname);
#endif
#ifdef XEN
PT_UPDATES_FLUSH();
#endif
sched_switch(td, newtd, flags);
CTR3(KTR_SCHED, "mi_switch: running %p(%s) prio %d",

9
sys/kern/subr_trap.c
View File

@ -73,6 +73,12 @@ __FBSDID("$FreeBSD$");
#include <machine/cpu.h>
#include <machine/pcb.h>
#ifdef XEN
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#endif
#include <security/mac/mac_framework.h>
/*
@ -118,6 +124,9 @@ userret(struct thread *td, struct trapframe *frame)
sched_userret(td);
KASSERT(td->td_locks == 0,
("userret: Returning with %d locks held.", td->td_locks));
#ifdef XEN
PT_UPDATES_FLUSH();
#endif
}
/*