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2e2568725c
freebsd/sys/kern
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Attilio Rao 71072af500 b_waiters cannot be adequately protected by the interlock because it is 
dropped after the call to lockmgr() so just revert this approach using
something similar to the precedent one:
BUF_LOCKWAITERS() just checks if there are waiters (not the actual number
of them) and it is based on newly introduced lockmgr_waiters() which
returns if the lockmgr has waiters or not. The name has been choosen
differently by old lockwaiters() in order to not confuse them.

KPI results enriched by this commit so __FreeBSD_version bumping and
manpage update will be happening soon.
'struct buf' also changes, so kernel ABI is disturbed.

Bug found by:	jeff
Approved by:	jeff, kib
2008-03-28 12:30:12 +00:00
..
bus_if.m Implement a BUS_BIND_INTR() method in the bus interface to bind an IRQ 2008-03-20 21:24:32 +00:00
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 Remove kernel support for M:N threading. 2008-03-12 10:12:01 +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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
init_sysent.c Regen. 2008-03-26 15:24:02 +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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_clock.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_condvar.c - Pass the priority argument from *sleep() into sleepq and down into 2008-03-12 06:31:06 +00:00
kern_conf.c Fix two races in the handling of the d_gianttrick for the D_NEEDGIANT 2008-03-17 13:17:10 +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_cpuset.c Fixed type of the fourth argument of cpuset_{get,set}affinity(2) to be size_t. 2008-03-25 09:11:53 +00:00
kern_descrip.c Add the new kernel-mode NFS Lock Manager. To use it instead of the 2008-03-26 15:23:12 +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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_exec.c Remove kernel support for M:N threading. 2008-03-12 10:12:01 +00:00
kern_exit.c In abort2(2): Accept a NULL arg pointer if nargs == 0 2008-03-22 16:32:52 +00:00
kern_fork.c Fix the leak of the vmspace on the fork when the process limits 2008-03-20 15:24:49 +00:00
kern_idle.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_intr.c Simplify the interrupt code a bit: 2008-03-17 22:42:01 +00:00
kern_jail.c Replace the last susers calls in netinet6/ with privilege checks. 2008-01-24 08:25:59 +00:00
kern_kthread.c - Relax requirements for p_numthreads, p_threads, p_swtick, and p_nice from 2008-03-19 06:19:01 +00:00
kern_ktr.c
kern_ktrace.c This patch adds a new ktrace(2) record type, KTR_STRUCT, whose payload 2008-02-23 01:01:49 +00:00
kern_linker.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_lock.c - Handle buffer lock waiters count directly in the buffer cache instead 2008-03-01 19:47:50 +00:00
kern_lockf.c Add the new kernel-mode NFS Lock Manager. To use it instead of the 2008-03-26 15:23:12 +00:00
kern_malloc.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_mbuf.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_mib.c Make sysctl_kern_arnd return a random buffer instead of a random long, 2008-02-17 16:44:48 +00:00
kern_module.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_mtxpool.c Universally adopt most conventional spelling of acquire. 2007-05-27 20:50:23 +00:00
kern_mutex.c Add KASSERT()'s to catch attempts to recurse on spin mutexes that aren't 2008-02-13 23:39:05 +00:00
kern_ntptime.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_priv.c Add __FBSDID() tag. 2008-03-07 15:27:08 +00:00
kern_proc.c - Relax requirements for p_numthreads, p_threads, p_swtick, and p_nice from 2008-03-19 06:19:01 +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 Remove extra uihold() call that accidentally sneak in during perforce 2008-03-19 07:52:07 +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 - In rw_wunlock_hard prefer to wakeup writers if there are both readers 2008-02-07 06:16:54 +00:00
kern_sema.c
kern_shutdown.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_sig.c - Add a new td flag TDF_NEEDSUSPCHK that is set whenever a thread needs 2008-03-21 08:23:25 +00:00
kern_subr.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
kern_switch.c - Restore runq to manipulating threads directly by putting runq links and 2008-03-20 05:51:16 +00:00
kern_sx.c - Pass the priority argument from *sleep() into sleepq and down into 2008-03-12 06:31:06 +00:00
kern_synch.c Consistently use ANSI C declarationsfor all functions in kern_synch.c. 2008-03-16 18:59:21 +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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
kern_thr.c Remove commented out code, thread suspension is done in thread library. 2008-03-23 02:03:06 +00:00
kern_thread.c - Add a new td flag TDF_NEEDSUSPCHK that is set whenever a thread needs 2008-03-21 08:23:25 +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 Fix a race where timeout/untimeout could cause crashes for Giant locked 2008-03-22 07:29:45 +00:00
kern_umtx.c Check NULL pointer. 2007-12-17 08:09:37 +00:00
kern_uuid.c Correct typo. 2007-04-23 12:53:00 +00:00
kern_xxx.c
ksched.c Commit 14/14 of sched_lock decomposition. 2007-06-05 00:00:57 +00:00
link_elf_obj.c Fix panic on e.g. "kldload /dev/null". 2008-03-15 17:40:18 +00:00
link_elf.c Fix panic on e.g. "kldload /dev/null". 2008-03-15 17:40:18 +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 Generate another function for the DTrace syscall provider to specify 2008-03-27 01:53:44 +00:00
md4c.c
md5c.c
p1003_1b.c Remove kernel support for M:N threading. 2008-03-12 10:12:01 +00:00
posix4_mib.c
sched_4bsd.c - Restore runq to manipulating threads directly by putting runq links and 2008-03-20 05:51:16 +00:00
sched_ule.c - Restore runq to manipulating threads directly by putting runq links and 2008-03-20 05:51:16 +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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
subr_blist.c
subr_bus.c Implement a BUS_BIND_INTR() method in the bus interface to bind an IRQ 2008-03-20 21:24:32 +00:00
subr_clist.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
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 Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT. 2008-03-25 09:39:02 +00:00
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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +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
subr_sbuf.c
subr_scanf.c
subr_sleepqueue.c - Add a new td flag TDF_NEEDSUSPCHK that is set whenever a thread needs 2008-03-21 08:23:25 +00:00
subr_smp.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +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 Implement taskqueue_block() and taskqueue_unblock(). These functions allow 2008-03-25 22:38:45 +00:00
subr_trap.c - Add a new td flag TDF_NEEDSUSPCHK that is set whenever a thread needs 2008-03-21 08:23:25 +00:00
subr_turnstile.c - Add THREAD_LOCKPTR_ASSERT() to assert that the thread's lock points at 2008-02-07 06:55:38 +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 - There is no more "uidinfo struct" mutex. 2008-03-17 11:48:40 +00:00
sys_generic.c - Remove stale comment. 2008-03-19 07:33:16 +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 - Relax requirements for p_numthreads, p_threads, p_swtick, and p_nice from 2008-03-19 06:19:01 +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 Regen. 2008-03-26 15:24:02 +00:00
syscalls.master Add the new kernel-mode NFS Lock Manager. To use it instead of the 2008-03-26 15:23:12 +00:00
systrace_args.c Regen after makesyscalls.sh change. 2008-03-27 01:55:06 +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 Make sure we restrict Linux only IPC calls from being executed 2008-02-12 20:55:03 +00:00
tty_compat.c
tty_conf.c
tty_cons.c The "free-lance" timer in the i8254 is only used for the speaker 2008-03-26 20:09:21 +00:00
tty_pts.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
tty_pty.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
tty_subr.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
tty_tty.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
tty.c - Relax requirements for p_numthreads, p_threads, p_swtick, and p_nice from 2008-03-19 06:19:01 +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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +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 Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT. 2008-03-25 09:39:02 +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 Change shm_dotruncate() so that it correctly handles cached pages that span 2008-02-07 05:55:16 +00:00
uipc_sockbuf.c Further clean up sorflush: 2008-02-04 12:25:13 +00:00
uipc_socket.c Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT. 2008-03-25 09:39:02 +00:00
uipc_syscalls.c Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT. 2008-03-25 09:39:02 +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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
vfs_aio.c Use FEATURE() macro to advertise aio availability. 2008-02-01 11:59:14 +00:00
vfs_bio.c b_waiters cannot be adequately protected by the interlock because it is 2008-03-28 12:30:12 +00:00
vfs_cache.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
vfs_cluster.c - Complete part of the unfinished bufobj work by consistently using 2008-03-22 09:15:16 +00:00
vfs_default.c - Complete part of the unfinished bufobj work by consistently using 2008-03-22 09:15:16 +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 In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
vfs_init.c
vfs_lookup.c In keeping with style(9)'s recommendations on macros, use a ';' 2008-03-16 10:58:09 +00:00
vfs_mount.c Yield the cpu in the kernel while iterating the list of the 2008-03-23 13:45:24 +00:00
vfs_subr.c b_waiters cannot be adequately protected by the interlock because it is 2008-03-28 12:30:12 +00:00
vfs_syscalls.c This patch adds a new ktrace(2) record type, KTR_STRUCT, whose payload 2008-02-23 01:01:49 +00:00
vfs_vnops.c - Don't acquire the vnode interlock in _vn_lock() unless no lock type 2008-03-24 04:17:35 +00:00
vnode_if.src Add the new kernel-mode NFS Lock Manager. To use it instead of the 2008-03-26 15:23:12 +00:00