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c1f7cf23b1
freebsd-skq/sys/kern
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Pawel Jakub Dawidek 764a938b11 Fix sx_try_slock(), so it only fails when there is an exclusive owner. 
Before that fix, it was possible for the function to fail if number
of sharers changes between 'x = sx->sx_lock' step and atomic_cmpset_acq_ptr()
call.

This fixes ZFS problem when ZFS returns strange EIO errors under load.
In ZFS there is a code that depends on the fact that sx_try_slock() can
only fail if there is an exclusive owner.

Discussed with:	attilio
Reviewed by:	jhb
Approved by:	re (kensmith)
2007-10-02 14:48:48 +00:00
..
bus_if.m o break newbus api: add a new argument of type driver_filter_t to 2007-02-23 12:19:07 +00:00
clock_if.m
cpufreq_if.m
device_if.m
genassym.sh
imgact_aout.c Correct two vm object reference leaks in error cases. 2006-03-16 08:51:59 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c Rework the support for ABIs to override resource limits (used by 32-bit 2007-05-14 22:40:04 +00:00
imgact_gzip.c
imgact_shell.c
inflate.c
init_main.c - Move all of the PS_ flags into either p_flag or td_flags. 2007-09-17 05:31:39 +00:00
init_sysent.c Regenerate. 2007-08-16 05:32:26 +00:00
kern_acct.c Add missing newline in the log message of the previous commit. 2007-08-31 13:56:26 +00:00
kern_alq.c Change the VOP_OPEN(), vn_open() vnode operation and d_fdopen() cdev operation 2007-06-01 14:33:11 +00:00
kern_clock.c - Move all of the PS_ flags into either p_flag or td_flags. 2007-09-17 05:31:39 +00:00
kern_condvar.c Commit 2/14 of sched_lock decomposition. 2007-06-04 23:50:56 +00:00
kern_conf.c Revert destroy_dev() to the state before destroy_dev_sched() was introduced. 2007-07-05 13:04:59 +00:00
kern_context.c Further system call comment cleanup: 2007-03-05 13:10:58 +00:00
kern_cpu.c Always call sched_bind(), even if on the CPU in question. It is wrong to 2007-08-20 06:28:26 +00:00
kern_descrip.c Remove the now-unused NET_{LOCK,UNLOCK,ASSERT}_GIANT() macros, which 2007-08-06 14:26:03 +00:00
kern_environment.c Further system call comment cleanup: 2007-03-05 13:10:58 +00:00
kern_event.c Revert previous commits which I committed by mistake. 2007-07-14 21:23:31 +00:00
kern_exec.c Change the management of cached pages (PQ_CACHE) in two fundamental 2007-09-25 06:25:06 +00:00
kern_exit.c Improve the ktrace locking somewhat to reduce overhead: 2007-06-13 20:01:42 +00:00
kern_fork.c - Redefine p_swtime and td_slptime as p_swtick and td_slptick. This 2007-09-21 04:10:23 +00:00
kern_idle.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
kern_intr.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
kern_jail.c Fix jails and jail-friendly file systems handling: 2007-04-13 23:54:22 +00:00
kern_kse.c - Move all of the PS_ flags into either p_flag or td_flags. 2007-09-17 05:31:39 +00:00
kern_kthread.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
kern_ktr.c Remove slightly oddly placed suser() call from the KTR/ALQ setup sysctl: 2006-09-09 16:09:01 +00:00
kern_ktrace.c Partially revert the previous change. I failed to notice that where 2007-08-29 21:17:11 +00:00
kern_linker.c Revert UF_OPENING workaround for CURRENT. 2007-05-31 11:51:53 +00:00
kern_lock.c Move lock_profile_object_{init,destroy}() into lock_{init,destroy}(). 2007-05-18 15:04:59 +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 Despite several examples in the kernel, the third argument of 2007-06-04 18:25:08 +00:00
kern_mib.c Revert VMCNT_* operations introduction. 2007-05-31 22:52:15 +00:00
kern_module.c Remove 'MPSAFE' annotations from the comments above most system calls: all 2007-03-04 22:36:48 +00:00
kern_mtxpool.c Universally adopt most conventional spelling of acquire. 2007-05-27 20:50:23 +00:00
kern_mutex.c - Remove the global definition of sched_lock in mutex.h to break 2007-07-18 20:46:06 +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
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 - Redefine p_swtime and td_slptime as p_swtick and td_slptick. This 2007-09-21 04:10:23 +00:00
kern_prot.c Eliminate now-unused SUSER_ALLOWJAIL arguments to priv_check_cred(); in 2007-06-12 00:12:01 +00:00
kern_resource.c - Use ruxagg() in calcru() to make sure we have current tick information 2007-07-17 01:08:09 +00:00
kern_rwlock.c Fix some problems with lock profiling in rw locks: 2007-07-20 08:43:42 +00:00
kern_sema.c
kern_shutdown.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
kern_sig.c - Calling sched_nice() in tdsigwakeup() is no longer required by ULE and 2007-07-19 08:49:16 +00:00
kern_subr.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
kern_switch.c Fix some entries in the locks static table of witness. 2007-09-20 20:38:43 +00:00
kern_sx.c Fix sx_try_slock(), so it only fails when there is an exclusive owner. 2007-10-02 14:48:48 +00:00
kern_synch.c - Move all of the PS_ flags into either p_flag or td_flags. 2007-09-17 05:31:39 +00:00
kern_syscalls.c Make system call modules a bit more robust: 2006-08-01 16:32:20 +00:00
kern_sysctl.c In userland_sysctl(), call useracc() with the actual newlen value to be 2007-09-02 09:59:33 +00:00
kern_tc.c Despite several examples in the kernel, the third argument of 2007-06-04 18:25:08 +00:00
kern_thr.c Add thr_kill2 syscall which sends a signal to a thread in another process. 2007-08-16 05:26:42 +00:00
kern_thread.c - Call sched_sleep() before we suspend threads. sched_wakeup() is already 2007-09-21 04:04:22 +00:00
kern_time.c rufetch and calcru sometimes should be called atomically together. 2007-06-09 21:48:44 +00:00
kern_timeout.c Remove the definition and implementation of 'CALLOUT_NETGIANT', a now- (and 2007-09-15 12:33:24 +00:00
kern_umtx.c Backout experimental adaptive-spin umtx code. 2007-06-06 07:35:08 +00:00
kern_uuid.c Correct typo. 2007-04-23 12:53:00 +00:00
kern_xxx.c Further system call comment cleanup: 2007-03-05 13:10:58 +00:00
ksched.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
link_elf_obj.c Revert UF_OPENING workaround for CURRENT. 2007-05-31 11:51:53 +00:00
link_elf.c Revert UF_OPENING workaround for CURRENT. 2007-05-31 11:51:53 +00:00
linker_if.m
Make.tags.inc Remove netkey directory from cscope/TAGs generation and replace 2007-07-05 08:55:14 +00:00
Makefile - Remove UMAP filesystem. It was disconnected from build three years ago, 2007-06-25 05:06:57 +00:00
makesyscalls.sh Add support for COMPAT6 syscalls. 2007-07-04 22:38:28 +00:00
md4c.c
md5c.c Fix a panic on sparc64 related to inproper aligment - we cannot assume, 2006-03-30 18:45:50 +00:00
p1003_1b.c Further system call comment cleanup: 2007-03-05 13:10:58 +00:00
posix4_mib.c Fix mispatch of includes list; allows my kernel to build successfully. 2006-11-12 03:34:03 +00:00
sched_4bsd.c - Redefine p_swtime and td_slptime as p_swtick and td_slptick. This 2007-09-21 04:10:23 +00:00
sched_ule.c - Reassign the thread queue lock to newtd prior to switching. Assigning 2007-10-02 01:30:18 +00:00
serdev_if.m MFp4: Add the ipend() method to the serdev I/F to allow umbrella 2006-04-23 22:12:39 +00:00
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 Add a mutex to protect the list of interrupt config hooks. We do assume 2006-07-19 18:53:56 +00:00
subr_blist.c
subr_bus.c First in a series of changes to remove the now-unused Giant compatibility 2007-07-27 11:59:57 +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 Add a new I/O request - BIO_FLUSH, which basically tells providers below to 2006-10-31 21:11:21 +00:00
subr_eventhandler.c
subr_fattime.c Better naming of fattime conversion functions, they do convert to timespec 2006-10-24 10:27:23 +00:00
subr_firmware.c Cleanup and document the implementation of firmware(9) based on 2007-02-15 17:21:31 +00:00
subr_hints.c Use a sleep mutex instead of an sx lock for the kernel environment. This 2006-07-09 21:42:58 +00:00
subr_kdb.c - Move all of the PS_ flags into either p_flag or td_flags. 2007-09-17 05:31:39 +00:00
subr_kobj.c
subr_lock.c Currently the LO_NOPROFILE flag (which is masked on upper level code by 2007-09-14 01:12:39 +00:00
subr_log.c
subr_mbpool.c Add parens around *free in *free++ in mbp_count() so that mbp_count() 2007-05-27 17:38:36 +00:00
subr_mchain.c
subr_module.c
subr_msgbuf.c
subr_param.c
subr_pcpu.c
subr_power.c
subr_prf.c Instead of doing comparisons using the pcpu area to see if 2007-03-08 06:44:34 +00:00
subr_prof.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
subr_rman.c Complete removal of restriction about overlaps to rman_manage_region: 2007-04-28 07:37:49 +00:00
subr_rtc.c Use utc_offset() where applicable, and hide the internals of it 2006-10-02 18:23:37 +00:00
subr_sbuf.c
subr_scanf.c
subr_sleepqueue.c subr_sleepqueue.c presents a thread lock missing which leads to dangerous 2007-09-13 09:12:36 +00:00
subr_smp.c This is a follow-up, cleaning-up commit about recent changes involving 2007-09-11 22:54:09 +00:00
subr_stack.c Correct typos 2006-05-28 22:15:28 +00:00
subr_taskqueue.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
subr_trap.c - Move all of the PS_ flags into either p_flag or td_flags. 2007-09-17 05:31:39 +00:00
subr_turnstile.c - Include opt_sched.h for SCHED_STATS. 2007-06-12 23:27:31 +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 Fix some entries in the locks static table of witness. 2007-09-20 20:38:43 +00:00
sys_generic.c Add freebsd6_ wrappers for mmap/lseek/pread/pwrite/truncate/ftruncate 2007-07-04 22:57:21 +00:00
sys_pipe.c Remove amountpipes counter for pipes -- this replicates the function of 2007-05-27 17:33:10 +00:00
sys_process.c - Move all of the PS_ flags into either p_flag or td_flags. 2007-09-17 05:31:39 +00:00
sys_socket.c Remove the now-unused NET_{LOCK,UNLOCK,ASSERT}_GIANT() macros, which 2007-08-06 14:26:03 +00:00
syscalls.c Regenerate. 2007-08-16 05:32:26 +00:00
syscalls.master Add thr_kill2 syscall which sends a signal to a thread in another process. 2007-08-16 05:26:42 +00:00
systrace_args.c Regenerate. 2007-08-16 05:32:26 +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 Eliminate now-unused SUSER_ALLOWJAIL arguments to priv_check_cred(); in 2007-06-12 00:12:01 +00:00
sysv_sem.c Relock the sema_mtxp unconditionally after copyin() for SETALL case in 2007-07-03 15:58:47 +00:00
sysv_shm.c Further system call comment cleanup: 2007-03-05 13:10:58 +00:00
tty_compat.c
tty_conf.c
tty_cons.c Revert UF_OPENING workaround for CURRENT. 2007-05-31 11:51:53 +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 Use make_dev_credf(MAKEDEV_REF) instead of make_dev() from pty clone handler. 2007-07-03 17:45:52 +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 ttyfree() frees the cdev(). But if there are pending kevents, 2007-07-20 09:41:54 +00:00
uipc_accf.c
uipc_cow.c
uipc_debug.c sblock() implements a sleep lock by interlocking SB_WANT and SB_LOCK flags 2007-05-03 14:42:42 +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 Complete break-out of sys/sys/mac.h into sys/security/mac/mac_framework.h 2006-10-22 11:52:19 +00:00
uipc_mbuf.c Generally migrate to ANSI function headers, and remove 'register' use. 2007-05-16 20:41:08 +00:00
uipc_mqueue.c Eliminate now-unused SUSER_ALLOWJAIL arguments to priv_check_cred(); in 2007-06-12 00:12:01 +00:00
uipc_sem.c Further system call comment cleanup: 2007-03-05 13:10:58 +00:00
uipc_sockbuf.c Now that sx(9) locks support an interruptible lock acquire primitive, 2007-05-31 11:51:22 +00:00
uipc_socket.c Despite several examples in the kernel, the third argument of 2007-06-04 18:25:08 +00:00
uipc_syscalls.c - During shutdown pending, when the last sack came in and 2007-08-27 05:19:48 +00:00
uipc_usrreq.c When we do open, we should lock the vnode exclusively. This fixes few races: 2007-07-26 16:58:09 +00:00
vfs_acl.c Replay minor system call comment cleanup applied to kern_acl.c in a race 2007-03-05 13:26:07 +00:00
vfs_aio.c Destroy the kaio_mtx on the freeing the struct kaioinfo in the 2007-08-20 11:53:26 +00:00
vfs_bio.c Fix the description of the formula used to autosize the number of 2007-09-26 11:22:23 +00:00
vfs_cache.c Fix some locking cases where we ask for exclusively locked vnode, but we get 2007-09-21 10:16:56 +00:00
vfs_cluster.c - Move rusage from being per-process in struct pstats to per-thread in 2007-06-01 01:12:45 +00:00
vfs_default.c Since renaming of vop_lock to _vop_lock, pre- and post-condition 2007-05-18 13:02:13 +00:00
vfs_export.c Move vnode-to-file-handle translation from vfs_vptofh to vop_vptofh method. 2007-02-15 22:08:35 +00:00
vfs_extattr.c Update comments to reflect changes in the extattrctl() code. 2006-12-23 00:30:03 +00:00
vfs_hash.c Make insmntque() externally visibile and allow it to fail (e.g. during 2007-03-13 01:50:27 +00:00
vfs_init.c Remove VFS_VPTOFH entirely. API is already broken and it is good time to 2007-02-16 17:32:41 +00:00
vfs_lookup.c Fix some locking cases where we ask for exclusively locked vnode, but we get 2007-09-21 10:16:56 +00:00
vfs_mount.c When restoring the mount after umount failed, the MNTK_UNMOUNT flag 2007-09-12 16:31:32 +00:00
vfs_subr.c When restoring the mount after umount failed, the MNTK_UNMOUNT flag 2007-09-12 16:31:32 +00:00
vfs_syscalls.c Rename mac_check_vnode_delete() MAC Framework and MAC Policy entry 2007-09-10 00:00:18 +00:00
vfs_vnops.c When we do open, we should lock the vnode exclusively. This fixes few races: 2007-07-26 16:58:09 +00:00
vnode_if.src Revert UF_OPENING workaround for CURRENT. 2007-05-31 11:51:53 +00:00