d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
2498cf8c42
freebsd-skq/sys/kern
History
John Baldwin 2498cf8c42 Add code to make default mutexes adaptive if the ADAPTIVE_MUTEXES kernel 
option is used (not on by default).

- In the case of trying to lock a mutex, if the MTX_CONTESTED flag is set,
  then we can safely read the thread pointer from the mtx_lock member while
  holding sched_lock.  We then examine the thread to see if it is currently
  executing on another CPU.  If it is, then we keep looping instead of
  blocking.
- In the case of trying to unlock a mutex, it is now possible for a mutex
  to have MTX_CONTESTED set in mtx_lock but to not have any threads
  actually blocked on it, so we need to handle that case.  In that case,
  we just release the lock as if MTX_CONTESTED was not set and return.
- We do not adaptively spin on Giant as Giant is held for long times and
  it slows SMP systems down to a crawl (it was taking several minutes,
  like 5-10 or so for my test alpha and sparc64 SMP boxes to boot up when
  they adaptively spinned on Giant).
- We only compile in the code to do this for SMP kernels, it doesn't make
  sense for UP kernels.

Tested on:	i386, alpha, sparc64
2002-05-21 20:47:11 +00:00
..
bus_if.m Use protected names (_foo) to cutdown on boatloads of lint warnings. 2002-04-21 11:16:10 +00:00
clock_if.m Add a generic implementation of inittodr() and resettodr(), as well as 2002-04-04 23:39:10 +00:00
device_if.m
genassym.sh Allow one to specify the AWK used in the environment(commandline). 2002-02-11 03:54:30 +00:00
imgact_aout.c - Change fill_kinfo_proc() to require that the process is locked when it 2002-04-09 20:10:46 +00:00
imgact_elf.c Remove __P. 2002-03-19 21:25:46 +00:00
imgact_gzip.c Modernize my email address. 2002-03-25 13:52:45 +00:00
imgact_shell.c Return a more meaningful errno when the length of the interpreter 2001-11-28 03:26:58 +00:00
inflate.c Modernize my email address. 2002-03-25 13:52:45 +00:00
init_main.c More s/file system/filesystem/g 2002-05-16 21:28:32 +00:00
init_sysent.c Add the lchflags(2) syscall. 2002-05-05 23:47:41 +00:00
kern_acct.c More s/file system/filesystem/g 2002-05-16 21:28:32 +00:00
kern_acl.c More s/file system/filesystem/g 2002-05-16 21:28:32 +00:00
kern_cap.c - Attempt to help declutter kern. sysctl by moving security out from 2002-01-16 06:55:30 +00:00
kern_clock.c Fixed breakage of binary compatibility of the kern.clockrate sysctl in 2002-05-05 04:33:09 +00:00
kern_condvar.c The cold and panicstr variables do not need to be protected by sched_lock. 2002-04-23 19:50:22 +00:00
kern_conf.c Break the following implementation of panic(3): 2002-04-25 13:17:33 +00:00
kern_descrip.c Lock down a socket, milestone 1. 2002-05-20 05:41:09 +00:00
kern_environment.c Cosmetic tweaks. Try and keep the style more consistent, catch some stray 2002-05-01 02:51:50 +00:00
kern_event.c Change p_can{debug,see,sched,signal}()'s first argument to be a thread 2002-05-19 00:14:50 +00:00
kern_exec.c - Reorder execve() so that it performs blocking operations before it 2002-05-02 15:00:14 +00:00
kern_exit.c Make funsetown() take a 'struct sigio **' so that the locking can 2002-05-06 19:31:28 +00:00
kern_fork.c - Protect randompid and nprocs with the allproc_lock. 2002-05-02 15:13:45 +00:00
kern_idle.c Pre-KSE/M3 commit. 2002-02-07 20:58:47 +00:00
kern_intr.c - Set the base priority of an ithread that has no handlers when we set its 2002-04-11 21:03:35 +00:00
kern_jail.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
kern_kthread.c Fix a couple of style bugs introduced (or touched by) previous commit. 2002-02-07 23:06:26 +00:00
kern_ktr.c Remove a stale comment. 2002-04-06 08:44:04 +00:00
kern_ktrace.c Change p_can{debug,see,sched,signal}()'s first argument to be a thread 2002-05-19 00:14:50 +00:00
kern_linker.c Test if rootvnode is NULL rather than if rootdev is NODEV when determining 2002-04-26 09:52:54 +00:00
kern_lock.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
kern_lockf.c Remove __P. 2002-03-19 21:25:46 +00:00
kern_malloc.c Add a bandaid so that sysctl kern.malloc works on sparc64. 2002-05-20 18:29:37 +00:00
kern_mib.c - Add a mutex to lock the global securelevel value. 2002-04-02 17:43:17 +00:00
kern_module.c - Lock down the ``module'' structure by adding an SX lock that is used by 2002-03-18 07:45:30 +00:00
kern_mtxpool.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
kern_mutex.c Add code to make default mutexes adaptive if the ADAPTIVE_MUTEXES kernel 2002-05-21 20:47:11 +00:00
kern_ntptime.c Hide the private parts of timecounter from a couple of places that don't 2002-04-26 21:31:44 +00:00
kern_physio.c Use btodb() macro. 2002-05-18 09:34:09 +00:00
kern_poll.c Make the DEVICE_POLLING code compile with -Werror and in LINT 2002-03-09 08:02:52 +00:00
kern_proc.c Change p_can{debug,see,sched,signal}()'s first argument to be a thread 2002-05-19 00:14:50 +00:00
kern_prot.c Change p_can{debug,see,sched,signal}()'s first argument to be a thread 2002-05-19 00:14:50 +00:00
kern_resource.c Change p_can{debug,see,sched,signal}()'s first argument to be a thread 2002-05-19 00:14:50 +00:00
kern_sema.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
kern_shutdown.c Fix alpha build. The alpha has dumpsys implemented. 2002-05-12 18:27:28 +00:00
kern_sig.c Change p_can{debug,see,sched,signal}()'s first argument to be a thread 2002-05-19 00:14:50 +00:00
kern_subr.c o Condition the compilation of uiomoveco() and vm_uiomove() 2002-05-05 22:42:40 +00:00
kern_switch.c Remove runq_findproc. This never worked right in the first place and can 2002-05-08 04:39:49 +00:00
kern_sx.c Set the lock type equal to the lock name for now as all of the current 2002-04-04 20:49:35 +00:00
kern_synch.c Remove __P. 2002-03-19 21:25:46 +00:00
kern_syscalls.c - Lock down the ``module'' structure by adding an SX lock that is used by 2002-03-18 07:45:30 +00:00
kern_sysctl.c Update comment regarding the locking of the sysctl tree. 2002-04-02 05:50:07 +00:00
kern_tc.c Initialize time_second to 1 instead of zero to pacify slightly bogus arp code. 2002-05-03 08:46:03 +00:00
kern_time.c Hide the private parts of timecounter from a couple of places that don't 2002-04-26 21:31:44 +00:00
kern_timeout.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
kern_xxx.c Change the suser() API to take advantage of td_ucred as well as do a 2002-04-01 21:31:13 +00:00
ksched.c In a threaded world, differnt priorirites become properties of 2002-02-11 20:37:54 +00:00
link_aout.c Simple p_ucred -> td_ucred changes to start using the per-thread ucred 2002-02-27 18:32:23 +00:00
link_elf_obj.c Don't use the symbol name to lookup the symbol value when we can use 2002-04-25 01:22:16 +00:00
link_elf.c Don't use the symbol name to lookup the symbol value when we can use 2002-04-25 01:22:16 +00:00
linker_if.m Add the sysctl "kern.function_list", which currently exports all 2001-10-30 15:21:45 +00:00
Make.tags.inc Don't hardcode /sys when making tags, instead use ${.CURDIR}/.. this 2002-02-27 10:07:15 +00:00
Makefile Don't generate <sys/syscalls-hide.h> it has never had any users anywhere in 2001-10-13 09:17:49 +00:00
makesyscalls.sh Usage style sweep: spell "usage" with a small 'u'. 2002-04-22 13:44:47 +00:00
md4c.c Import kernel part of SMB/CIFS requester. 2001-04-10 07:59:06 +00:00
md5c.c Add ia64 support. 2000-09-29 13:36:47 +00:00
p1003_1b.c Change p_can{debug,see,sched,signal}()'s first argument to be a thread 2002-05-19 00:14:50 +00:00
posix4_mib.c
subr_acl_posix1e.c More s/file system/filesystem/g 2002-05-16 21:28:32 +00:00
subr_autoconf.c Remove __P. 2002-03-19 21:25:46 +00:00
subr_blist.c Now that daddr_t has grown up, use %lld to printf it and cast it to long 2002-05-18 23:46:04 +00:00
subr_bus.c Don't call malloc(9) to allocate zero bytes softc data for devices. 2002-04-23 15:48:23 +00:00
subr_clist.c Remove __P. 2002-03-19 21:25:46 +00:00
subr_clock.c Add a generic implementation of inittodr() and resettodr(), as well as 2002-04-04 23:39:10 +00:00
subr_devstat.c GC: BIO_ORDERED, various infrastructure dealing with BIO_ORDERED. 2002-02-22 09:26:35 +00:00
subr_disk.c Implement DIOCGFRONTSTUFF ioctl which reports how many bytes from the start 2002-04-09 15:43:32 +00:00
subr_disklabel.c Comment out Kirks io-request priority hack until we can do this in a 2002-04-22 06:53:20 +00:00
subr_diskmbr.c Remove __P. 2002-03-19 21:25:46 +00:00
subr_diskslice.c Retire the bogus uses of the disklabel field d_sbsize and begin to 2002-05-12 20:49:41 +00:00
subr_eventhandler.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
subr_hints.c Cosmetic tweaks. Try and keep the style more consistent, catch some stray 2002-05-01 02:51:50 +00:00
subr_kobj.c Convert more malloc+bzero to malloc+M_ZERO. 2000-12-08 21:51:06 +00:00
subr_log.c Make funsetown() take a 'struct sigio **' so that the locking can 2002-05-06 19:31:28 +00:00
subr_mbuf.c Separate "seperate" from kernel source. 2002-05-16 22:43:20 +00:00
subr_mchain.c Move the new byte order function prototypes from <sys/param.h> to 2002-04-26 22:48:23 +00:00
subr_module.c Preceed/preceeding are not english words. Use precede and preceding. 2001-02-18 10:43:53 +00:00
subr_param.c Improve the implementation of adjtime(2). 2002-04-15 12:23:11 +00:00
subr_pcpu.c Add a per-cpu variable, cpumask, the preshifted equivalent of 1 << cpuid. 2002-01-05 09:35:50 +00:00
subr_power.c Add generalized power profile code. 2002-03-04 18:46:13 +00:00
subr_prf.c Add a sysctl which disables the logging of console output. 2002-04-29 09:15:38 +00:00
subr_prof.c Remove __P. 2002-03-19 21:25:46 +00:00
subr_rman.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
subr_rtc.c Add a generic implementation of inittodr() and resettodr(), as well as 2002-04-04 23:39:10 +00:00
subr_sbuf.c Fix warnings on gcc-3.1+ where __func__ is a const char * instead of a 2002-03-19 10:56:46 +00:00
subr_scanf.c
subr_smp.c Updated a doubly stale comment about signotify(). Fixed a nearby long line. 2002-04-05 10:00:37 +00:00
subr_taskqueue.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
subr_trap.c Moved signal handling and rescheduling from userret() to ast() so that 2002-04-04 17:49:48 +00:00
subr_turnstile.c Add code to make default mutexes adaptive if the ADAPTIVE_MUTEXES kernel 2002-05-21 20:47:11 +00:00
subr_witness.c In witness_unlock(), when updating a lock list entry bucket, decrement the 2002-05-20 19:16:22 +00:00
subr_xxx.c Here follows the new kernel dumping infrastructure. 2002-03-31 22:37:00 +00:00
sys_generic.c o Correct an error made in revision 1.65: In readv(), if uap->iovcnt is 2002-05-09 02:30:41 +00:00
sys_pipe.c Make funsetown() take a 'struct sigio **' so that the locking can 2002-05-06 19:31:28 +00:00
sys_process.c All signals can be sent to the inferior process when it's restarted, 2002-05-19 01:37:43 +00:00
sys_socket.c Lock down a socket, milestone 1. 2002-05-20 05:41:09 +00:00
syscalls.c Add the lchflags(2) syscall. 2002-05-05 23:47:41 +00:00
syscalls.master Add an entry for the lchflags(2) syscall. It's useful to prevent 2002-05-05 23:37:44 +00:00
sysv_ipc.c Change the suser() API to take advantage of td_ucred as well as do a 2002-04-01 21:31:13 +00:00
sysv_msg.c Change the suser() API to take advantage of td_ucred as well as do a 2002-04-01 21:31:13 +00:00
sysv_sem.c Remove __P. 2002-03-19 21:25:46 +00:00
sysv_shm.c Remove __P. 2002-03-19 21:25:46 +00:00
tty_compat.c Fixed some style bugs in the removal of __P(()). The main ones were 2002-03-24 05:09:11 +00:00
tty_conf.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
tty_cons.c Change the suser() API to take advantage of td_ucred as well as do a 2002-04-01 21:31:13 +00:00
tty_pty.c - Lock proctree_lock instead of pgrpsess_lock. 2002-04-16 17:09:22 +00:00
tty_subr.c Remove __P. 2002-03-19 21:25:46 +00:00
tty_tty.c Remove __P. 2002-03-19 21:25:46 +00:00
tty.c Make funsetown() take a 'struct sigio **' so that the locking can 2002-05-06 19:31:28 +00:00
uipc_accf.c Revert the last bits of my bogus move of NMBCLUSTERS 2001-06-01 21:47:34 +00:00
uipc_domain.c Lock down a socket, milestone 1. 2002-05-20 05:41:09 +00:00
uipc_mbuf2.c just merged cosmetic changes from KAME to ease sync between KAME and FreeBSD. 2002-04-19 04:46:24 +00:00
uipc_mbuf.c Fix corner case where m_len was not being initialized. 2002-04-12 00:01:50 +00:00
uipc_proto.c Implement a LOCAL_PEERCRED socket option which returns a 2001-08-17 22:01:18 +00:00
uipc_sockbuf.c Subtle fix to the accept filter LRU code. In some cases, a newly 2002-05-20 17:34:31 +00:00
uipc_socket2.c Subtle fix to the accept filter LRU code. In some cases, a newly 2002-05-20 17:34:31 +00:00
uipc_socket.c Lock down a socket, milestone 1. 2002-05-20 05:41:09 +00:00
uipc_syscalls.c Lock down a socket, milestone 1. 2002-05-20 05:41:09 +00:00
uipc_usrreq.c Lock down a socket, milestone 1. 2002-05-20 05:41:09 +00:00
vfs_acl.c More s/file system/filesystem/g 2002-05-16 21:28:32 +00:00
vfs_aio.c Lock down a socket, milestone 1. 2002-05-20 05:41:09 +00:00
vfs_bio.c Remove a six year old undocumented #ifdef : NO_B_MALLOC. 2002-05-04 19:24:55 +00:00
vfs_cache.c Disable the shared locking namei() code for now. It breaks several stacking 2002-05-14 21:59:49 +00:00
vfs_cluster.c Make daddr_t and u_daddr_t 64bits wide. 2002-05-14 11:09:43 +00:00
vfs_conf.c Rework the kernel environment subsystem. We now convert the static 2002-04-17 13:06:36 +00:00
vfs_default.c Remove a stale comment saying that the vnode lock must be the first 2002-04-27 22:20:33 +00:00
vfs_export.c Fixed some style bugs in the removal of __P(()). The main ones were 2002-03-24 05:09:11 +00:00
vfs_extattr.c Change two vput() that should have been vrele(). 2002-05-20 14:59:43 +00:00
vfs_init.c More s/file system/filesystem/g 2002-05-16 21:28:32 +00:00
vfs_lookup.c More s/file system/filesystem/g 2002-05-16 21:28:32 +00:00
vfs_mount.c Rework the kernel environment subsystem. We now convert the static 2002-04-17 13:06:36 +00:00
vfs_subr.c More s/file system/filesystem/g 2002-05-16 21:28:32 +00:00
vfs_syscalls.c Change two vput() that should have been vrele(). 2002-05-20 14:59:43 +00:00
vfs_vnops.c Disable the shared locking namei() code for now. It breaks several stacking 2002-05-14 21:59:49 +00:00
vnode_if.src Make daddr_t and u_daddr_t 64bits wide. 2002-05-14 11:09:43 +00:00