Oleg Nesterov 5c01ba49e6 do_wait-wakeup-optimization: fix child_wait_callback()->eligible_child() usage ...

child_wait_callback()->eligible_child() is not right, we can miss the
wakeup if the task was detached before __wake_up_parent() and the caller
of do_wait() didn't use __WALL.

Move ->wo_pid checks from eligible_child() to the new helper,
eligible_pid(), and change child_wait_callback() to use it instead of
eligible_child().

Note: actually I think it would be better to fix the __WCLONE check in
eligible_child(), it doesn't look exactly right.  But it is not clear what
is the supposed behaviour, and any change is user-visible.

Reported-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Tested-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-09-24 07:21:00 -07:00

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gcov

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irq

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power

headers: utsname.h redux

2009-09-23 18:13:10 -07:00

time

time: add function to convert between calendar time and broken-down time for universal use

2009-09-24 07:20:56 -07:00

trace

cpumask: use zalloc_cpumask_var() where possible

2009-09-24 09:34:24 +09:30

.gitignore

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acct.c

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async.c

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audit_tree.c

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audit_watch.c

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audit.c

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audit.h

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auditfilter.c

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auditsc.c

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backtracetest.c

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bounds.c

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capability.c

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cgroup_freezer.c

cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

cgroup.c

cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

compat.c

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configs.c

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cpu.c

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cpuset.c

cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

cred-internals.h

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cred.c

creds_are_invalid() needs to be exported for use by modules:

2009-09-23 11:02:26 -07:00

delayacct.c

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dma.c

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exec_domain.c

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exit.c

do_wait-wakeup-optimization: fix child_wait_callback()->eligible_child() usage

2009-09-24 07:21:00 -07:00

extable.c

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fork.c

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-23 09:46:15 -07:00

freezer.c

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futex.c

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groups.c

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hrtimer.c

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-23 09:46:15 -07:00

hung_task.c

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kfifo.c

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kgdb.c

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kmod.c

Revert "kmod: fix race in usermodehelper code"

2009-09-23 18:12:10 -07:00

kprobes.c

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ksysfs.c

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kthread.c

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latencytop.c

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lockdep_internals.h

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lockdep_proc.c

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lockdep_states.h

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lockdep.c

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Makefile

cgroups: move the cgroup debug subsys into cgroup.c to access internal state

2009-09-24 07:20:57 -07:00

module.c

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mutex-debug.c

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mutex-debug.h

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mutex.c

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mutex.h

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notifier.c

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ns_cgroup.c

cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

nsproxy.c

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panic.c

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params.c

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perf_event.c

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pid_namespace.c

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pid.c

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pm_qos_params.c

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posix-cpu-timers.c

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posix-timers.c

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printk.c

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profile.c

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ptrace.c

ptrace: __ptrace_detach: do __wake_up_parent() if we reap the tracee

2009-09-24 07:20:59 -07:00

rcupdate.c

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rcutorture.c

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rcutree_plugin.h

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rcutree_trace.c

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rcutree.h

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relay.c

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res_counter.c

memory controller: soft limit organize cgroups

2009-09-24 07:20:59 -07:00

resource.c

walk system ram range

2009-09-23 07:39:41 -07:00

rtmutex_common.h

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rtmutex-debug.c

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rtmutex-debug.h

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rtmutex-tester.c

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rtmutex.c

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rtmutex.h

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rwsem.c

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sched_clock.c

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sched_cpupri.c

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sched_cpupri.h

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sched_debug.c

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sched_fair.c

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sched_features.h

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sched_idletask.c

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sched_rt.c

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sched_stats.h

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sched.c

cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

seccomp.c

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semaphore.c

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signal.c

ptrace: __ptrace_detach: do __wake_up_parent() if we reap the tracee

2009-09-24 07:20:59 -07:00

slow-work.c

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smp.c

cpumask: remove arch_send_call_function_ipi

2009-09-24 09:34:47 +09:30

softirq.c

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softlockup.c

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spinlock.c

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srcu.c

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stacktrace.c

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stop_machine.c

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sys_ni.c

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sys.c

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sysctl_check.c

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sysctl.c

headers: utsname.h redux

2009-09-23 18:13:10 -07:00

taskstats.c

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test_kprobes.c

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time.c

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timeconst.pl

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timer.c

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-23 09:46:15 -07:00

tracepoint.c

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tsacct.c

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uid16.c

headers: utsname.h redux

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up.c

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user_namespace.c

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user.c

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utsname_sysctl.c

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utsname.c

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wait.c

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