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freebsd/sys/kern
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Jeff Roberson 5dff04c31f Adaptive spinning in write path with readers and writer starvation avoidance. 
- Move recursion checking into rwlock inlines to free a bit for use with
   adaptive spinners.
 - Clear the RW_LOCK_WRITE_SPINNERS flag whenever the lock state changes
   causing write spinners to restart their loop.
 - Write spinners are limited by a count while readers hold the lock as
   there is no way to know for certain whether readers are running still.
 - In the read path block if there are write waiters or spinners to avoid
   starving writers.  Use a new per-thread count, td_rw_rlocks, to skip
   starvation avoidance if it might cause a deadlock.
 - Remove or change invalid assertions in turnstiles.

Reviewed by:    attilio (developed parts of the patch as well)
Sponsored by:   Nokia
2008-02-06 01:02:13 +00:00
..
bus_if.m
…
clock_if.m
…
cpufreq_if.m
…
device_if.m
…
genassym.sh
refactor code so it can run in a chroot without having to have /dev/mounted
2008-01-18 17:02:14 +00:00
imgact_aout.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
imgact_elf32.c
…
imgact_elf64.c
…
imgact_elf.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
imgact_gzip.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
imgact_shell.c
…
inflate.c
…
init_main.c
Don't zero td_runtime when billing thread CPU usage to the process;
2008-01-10 22:11:20 +00:00
init_sysent.c
Regenerate.
2008-01-20 23:44:24 +00:00
kern_acct.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
kern_alq.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
kern_clock.c
Add a new 'why' argument to kdb_enter(), and a set of constants to use
2007-12-25 17:52:02 +00:00
kern_condvar.c
Commit 2/14 of sched_lock decomposition.
2007-06-04 23:50:56 +00:00
kern_conf.c
Apply a workaround for the unkillable jail problem where some devices created
2007-12-05 01:22:03 +00:00
kern_context.c
…
kern_cpu.c
Remove duplicate cpufreq levels, i.e. ones that are within 25 Mhz of each
2008-01-16 01:05:21 +00:00
kern_descrip.c
Export a type for POSIX SHM file descriptors via kern.proc.filedesc as
2008-01-20 19:55:52 +00:00
kern_environment.c
Merge first in a series of TrustedBSD MAC Framework KPI changes
2007-10-24 19:04:04 +00:00
kern_event.c
Make ftruncate a 'struct file' operation rather than a vnode operation.
2008-01-07 20:05:19 +00:00
kern_exec.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
kern_exit.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
kern_fork.c
When forking, the new thread deserves a name too. Don't just use the
2007-11-15 02:13:44 +00:00
kern_idle.c
rename the process to 'idle' and 'intr' as per jhb.
2007-10-27 00:52:26 +00:00
kern_intr.c
fix typo in code normally not compiled in.
2007-10-29 20:45:31 +00:00
kern_jail.c
Replace the last susers calls in netinet6/ with privilege checks.
2008-01-24 08:25:59 +00:00
kern_kse.c
Fix build.
2007-11-15 14:16:20 +00:00
kern_kthread.c
Acquire the process mutex and spin locks before calling thread_exit() in
2007-11-15 21:45:17 +00:00
kern_ktr.c
…
kern_ktrace.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
kern_linker.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
kern_lock.c
Add WITNESS support to lockmgr locking primitive.
2008-02-06 00:37:14 +00:00
kern_lockf.c
Do not call free() while holding vnode interlock.
2007-08-07 09:04:50 +00:00
kern_malloc.c
Use vm_offset_t for kmembase and kmemlimit rather than char *, avoiding
2007-06-27 13:39:38 +00:00
kern_mbuf.c
Give MEXTADD() another argument to make both void pointers to the
2008-02-01 19:36:27 +00:00
kern_mib.c
Add 'compat_freebsd[4567]' features corresponding to the kernel options
2008-01-17 22:46:32 +00:00
kern_module.c
Move several data structure definitions out of freebsd32_misc.c and into
2007-12-06 23:11:27 +00:00
kern_mtxpool.c
…
kern_mutex.c
- Re-implement lock profiling in such a way that it no longer breaks
2007-12-15 23:13:31 +00:00
kern_ntptime.c
Only require privilege to set the current time adjustment, not in order to
2007-06-14 18:37:58 +00:00
kern_physio.c
…
kern_pmc.c
Kernel and hwpmc(4) support for callchain capture.
2007-12-07 08:20:17 +00:00
kern_poll.c
Remove the now-unused NET_{LOCK,UNLOCK,ASSERT}_GIANT() macros, which
2007-08-06 14:26:03 +00:00
kern_priv.c
Continue kernel privilege cleanup for 7.0: unstaticize suser_enabled and
2007-07-02 14:03:29 +00:00
kern_proc.c
Don't zero td_runtime when billing thread CPU usage to the process;
2008-01-10 22:11:20 +00:00
kern_prot.c
Merge first in a series of TrustedBSD MAC Framework KPI changes
2007-10-24 19:04:04 +00:00
kern_resource.c
Don't zero td_runtime when billing thread CPU usage to the process;
2008-01-10 22:11:20 +00:00
kern_rmlock.c
Expand lock class with the "virtual" function lc_assert which will offer
2007-11-18 14:43:53 +00:00
kern_rwlock.c
Adaptive spinning in write path with readers and writer starvation avoidance.
2008-02-06 01:02:13 +00:00
kern_sema.c
…
kern_shutdown.c
Add a wrapper function that bound checks writes to the dump device.
2008-01-28 19:04:07 +00:00
kern_sig.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
kern_subr.c
Commit 14/14 of sched_lock decomposition.
2007-06-05 00:00:57 +00:00
kern_switch.c
generally we are interested in what thread did something as
2007-11-14 06:21:24 +00:00
kern_sx.c
- Re-implement lock profiling in such a way that it no longer breaks
2007-12-15 23:13:31 +00:00
kern_synch.c
Don't zero td_runtime when billing thread CPU usage to the process;
2008-01-10 22:11:20 +00:00
kern_syscalls.c
…
kern_sysctl.c
Add sysctl_rename_oid() to support device_set_unit() usage. Otherwise,
2007-11-30 21:29:08 +00:00
kern_tc.c
Note what is too {short,long}.
2008-01-02 18:48:27 +00:00
kern_thr.c
This time REALLY copy the name from the proc to the thread as a default.
2007-11-15 06:35:26 +00:00
kern_thread.c
give thread0 the tid 100000 and bumpt the others to start at 100001
2007-12-22 04:56:48 +00:00
kern_time.c
Make sure reading td_runtime in critical section since thread may be
2008-01-18 13:00:28 +00:00
kern_timeout.c
Really, no explicit checks against against lock_class_* object should be
2008-02-06 00:04:09 +00:00
kern_umtx.c
Check NULL pointer.
2007-12-17 08:09:37 +00:00
kern_uuid.c
…
kern_xxx.c
…
ksched.c
Commit 14/14 of sched_lock decomposition.
2007-06-05 00:00:57 +00:00
link_elf_obj.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
link_elf.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
linker_if.m
Add a function to list symbols in a file and their values at the
2007-11-18 00:23:31 +00:00
Make.tags.inc
Remove netkey directory from cscope/TAGs generation and replace
2007-07-05 08:55:14 +00:00
Makefile
style.Makefile(5)
2007-12-14 21:30:51 +00:00
makesyscalls.sh
Add support for COMPAT6 syscalls.
2007-07-04 22:38:28 +00:00
md4c.c
…
md5c.c
…
p1003_1b.c
generally we are interested in what thread did something as
2007-11-14 06:21:24 +00:00
posix4_mib.c
…
sched_4bsd.c
- Re-implement lock profiling in such a way that it no longer breaks
2007-12-15 23:13:31 +00:00
sched_ule.c
- sched_prio() should only adjust tdq_lowpri if the thread is running or on
2008-01-23 03:10:18 +00:00
serdev_if.m
…
subr_acl_posix1e.c
Eliminate now-unused SUSER_ALLOWJAIL arguments to priv_check_cred(); in
2007-06-12 00:12:01 +00:00
subr_autoconf.c
…
subr_blist.c
…
subr_bus.c
Add devctl_process_running() so that power management system driver
2008-01-27 16:06:37 +00:00
subr_clist.c
…
subr_clock.c
If clock_ct_to_ts fails to convert time time from the real time clock,
2007-07-23 09:42:32 +00:00
subr_devstat.c
…
subr_disk.c
…
subr_eventhandler.c
…
subr_fattime.c
…
subr_firmware.c
…
subr_hints.c
…
subr_kdb.c
Add a new 'why' argument to kdb_enter(), and a set of constants to use
2007-12-25 17:52:02 +00:00
subr_kobj.c
…
subr_lock.c
Really, no explicit checks against against lock_class_* object should be
2008-02-06 00:04:09 +00:00
subr_log.c
…
subr_mbpool.c
…
subr_mchain.c
…
subr_module.c
…
subr_msgbuf.c
…
subr_param.c
Export maxswzone, maxbcache, maxtsiz, dfldsiz, maxdsiz, dflssiz, maxssiz,
2007-10-16 10:40:53 +00:00
subr_pcpu.c
generally we are interested in what thread did something as
2007-11-14 06:21:24 +00:00
subr_power.c
…
subr_prf.c
…
subr_prof.c
Commit 14/14 of sched_lock decomposition.
2007-06-05 00:00:57 +00:00
subr_rman.c
…
subr_rtc.c
…
subr_sbuf.c
…
subr_scanf.c
…
subr_sleepqueue.c
Fix a bug where a thread that hit the race where the sleep timeout fires
2008-01-25 19:44:46 +00:00
subr_smp.c
A few whitespace fixes.
2008-01-02 17:09:15 +00:00
subr_stack.c
When a symbol name can't be resolved, return "??" as the name, rather
2007-12-03 14:44:35 +00:00
subr_taskqueue.c
Rename the kthread_xxx (e.g. kthread_create()) calls
2007-10-20 23:23:23 +00:00
subr_trap.c
Kernel and hwpmc(4) support for callchain capture.
2007-12-07 08:20:17 +00:00
subr_turnstile.c
Adaptive spinning in write path with readers and writer starvation avoidance.
2008-02-06 01:02:13 +00:00
subr_unit.c
Since cdev mutex is after system map mutex in global lock order, free()
2007-07-04 06:56:58 +00:00
subr_witness.c
Add a new 'why' argument to kdb_enter(), and a set of constants to use
2007-12-25 17:52:02 +00:00
sys_generic.c
Make ftruncate a 'struct file' operation rather than a vnode operation.
2008-01-07 20:05:19 +00:00
sys_pipe.c
Make ftruncate a 'struct file' operation rather than a vnode operation.
2008-01-07 20:05:19 +00:00
sys_process.c
Use VM_FAULT_DIRTY to fault in pages for write access in
2007-11-08 19:35:36 +00:00
sys_socket.c
Make ftruncate a 'struct file' operation rather than a vnode operation.
2008-01-07 20:05:19 +00:00
syscalls.c
Regenerate.
2008-01-20 23:44:24 +00:00
syscalls.master
Use audit events AUE_SHMOPEN and AUE_SHMUNLINK with new system calls
2008-01-20 23:43:06 +00:00
systrace_args.c
Regen for shm_open(2) and shm_unlink(2).
2008-01-08 22:01:26 +00:00
sysv_ipc.c
Eliminate now-unused SUSER_ALLOWJAIL arguments to priv_check_cred(); in
2007-06-12 00:12:01 +00:00
sysv_msg.c
Merge first in a series of TrustedBSD MAC Framework KPI changes
2007-10-24 19:04:04 +00:00
sysv_sem.c
Merge first in a series of TrustedBSD MAC Framework KPI changes
2007-10-24 19:04:04 +00:00
sysv_shm.c
Merge first in a series of TrustedBSD MAC Framework KPI changes
2007-10-24 19:04:04 +00:00
tty_compat.c
…
tty_conf.c
…
tty_cons.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
tty_pts.c
Fix bad function type passed to destroy_dev_sched_cb().
2007-07-05 05:54:47 +00:00
tty_pty.c
In rev. 1.156, the convertion of the minor number to the unit number
2008-01-26 06:09:23 +00:00
tty_subr.c
…
tty_tty.c
Lock Giant and proctree lock around dereferencing p_session->s_ttyvp->v_rdev.
2007-07-03 17:46:37 +00:00
tty.c
Close a race in the kern.ttys sysctl handler that resulted in panics in
2008-01-08 04:53:28 +00:00
uipc_accf.c
…
uipc_cow.c
Give MEXTADD() another argument to make both void pointers to the
2008-02-01 19:36:27 +00:00
uipc_debug.c
Add missing sb_sndptr* fields to db_print_sockbuf().
2008-01-03 15:19:31 +00:00
uipc_domain.c
Remove the now-unused NET_{LOCK,UNLOCK,ASSERT}_GIANT() macros, which
2007-08-06 14:26:03 +00:00
uipc_mbuf2.c
Merge first in a series of TrustedBSD MAC Framework KPI changes
2007-10-24 19:04:04 +00:00
uipc_mbuf.c
Give MEXTADD() another argument to make both void pointers to the
2008-02-01 19:36:27 +00:00
uipc_mqueue.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
uipc_sem.c
Free MAC label on a POSIX semaphore when the semaphore is freed.
2008-01-07 22:03:19 +00:00
uipc_shm.c
Add a set of regression tests for the POSIX shm API (shm_open(2) and
2008-01-16 15:51:24 +00:00
uipc_sockbuf.c
Further clean up sorflush:
2008-02-04 12:25:13 +00:00
uipc_socket.c
Further clean up sorflush:
2008-02-04 12:25:13 +00:00
uipc_syscalls.c
Give sendfile(2) a SF_SYNC flag which makes it wait until all mbufs
2008-02-03 15:54:41 +00:00
uipc_usrreq.c
Move unlock of global UNIX domain socket lock slightly lower in
2008-01-18 19:16:03 +00:00
vfs_acl.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
vfs_aio.c
Use FEATURE() macro to advertise aio availability.
2008-02-01 11:59:14 +00:00
vfs_bio.c
- Introduce the function lockmgr_recursed() which returns true if the
2008-01-19 17:36:23 +00:00
vfs_cache.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
vfs_cluster.c
…
vfs_default.c
Cleanup lockmgr interface and exported KPI:
2008-01-24 12:34:30 +00:00
vfs_export.c
…
vfs_extattr.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
vfs_hash.c
…
vfs_init.c
…
vfs_lookup.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
vfs_mount.c
Cleanup lockmgr interface and exported KPI:
2008-01-24 12:34:30 +00:00
vfs_subr.c
Cleanup lockmgr interface and exported KPI:
2008-01-24 12:34:30 +00:00
vfs_syscalls.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
vfs_vnops.c
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00
vnode_if.src
VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
2008-01-13 14:44:15 +00:00