John Wright c6fc81afa2 sched: Fix a race between ttwu() and migrate_task() ...

Based on commit e2912009fb upstream, but
done differently as this issue is not present in .33 or .34 kernels due
to rework in this area.

If a task is in the TASK_WAITING state, then try_to_wake_up() is working
on it, and it will place it on the correct cpu.

This commit ensures that neither migrate_task() nor __migrate_task()
calls set_task_cpu(p) while p is in the TASK_WAKING state.  Otherwise,
there could be two concurrent calls to set_task_cpu(p), resulting in
the task's cfs_rq being inconsistent with its cpu.

Signed-off-by: John Wright <john.wright@hp.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2010-04-26 07:41:33 -07:00

..

gcov

microblaze: Enable GCOV_PROFILE_ALL

2009-09-21 14:29:21 +02:00

irq

genirq: Force MSI irq handlers to run with interrupts disabled

2010-04-26 07:41:18 -07:00

power

Freezer: Fix buggy resume test for tasks frozen with cgroup freezer

2010-04-26 07:41:17 -07:00

time

hrtimer: Tune hrtimer_interrupt hang logic

2010-04-01 15:58:14 -07:00

trace

tracing: Do not record user stack trace from NMI context

2010-04-01 15:58:12 -07:00

.gitignore

…

acct.c

bsdacct: fix uid/gid misreporting

2009-12-18 14:03:52 -08:00

async.c

…

audit_tree.c

fix more leaks in audit_tree.c tag_chunk()

2010-01-18 10:19:50 -08:00

audit_watch.c

Audit: reorganize struct audit_watch to save 8 bytes

2009-09-24 03:50:25 -04:00

audit.c

Audit: send signal info if selinux is disabled

2009-09-24 03:50:26 -04:00

audit.h

Fix rule eviction order for AUDIT_DIR

2009-06-24 00:02:38 -04:00

auditfilter.c

Audit: clean up all op= output to include string quoting

2009-06-24 00:00:52 -04:00

auditsc.c

Audit: rearrange audit_context to save 16 bytes per struct

2009-09-24 03:50:26 -04:00

backtracetest.c

…

bounds.c

…

capability.c

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cgroup_freezer.c

Freezer: Fix buggy resume test for tasks frozen with cgroup freezer

2010-04-26 07:41:17 -07:00

cgroup.c

cgroups: fix 2.6.32 regression causing BUG_ON() in cgroup_diput()

2010-01-18 10:19:32 -08:00

compat.c

…

configs.c

…

cpu.c

timers, init: Limit the number of per cpu calibration bootup messages

2010-01-28 15:01:14 -08:00

cpuset.c

cpuset: fix the problem that cpuset_mem_spread_node() returns an offline node

2010-04-01 15:58:46 -07:00

cred-internals.h

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cred.c

kernel/cred.c: use kmem_cache_free

2010-02-09 04:51:01 -08:00

delayacct.c

headers: taskstats_kern.h trim

2009-09-18 09:48:52 -07:00

dma.c

…

exec_domain.c

…

exit.c

connector: fix regression introduced by sid connector

2009-10-29 07:39:25 -07:00

extable.c

…

fork.c

Correct nr_processes() when CPUs have been unplugged

2009-11-03 07:52:39 -08:00

freezer.c

sched: fix nr_uninterruptible accounting of frozen tasks really

2009-07-18 14:19:53 +02:00

futex_compat.c

futex: Fix compat_futex to be same as futex for REQUEUE_PI

2009-08-10 15:41:12 +02:00

futex.c

futex: Handle futex value corruption gracefully

2010-02-23 07:37:43 -08:00

groups.c

…

hrtimer.c

hrtimer: Tune hrtimer_interrupt hang logic

2010-04-01 15:58:14 -07:00

hung_task.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

itimer.c

itimers: Add tracepoints for itimer

2009-08-29 14:10:07 +02:00

kallsyms.c

kallsyms: use new arch_is_kernel_text()

2009-09-23 07:39:30 -07:00

Kconfig.freezer

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Kconfig.hz

…

Kconfig.preempt

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kexec.c

kexec: fix omitting offset in extended crashkernel syntax

2009-07-29 19:10:34 -07:00

kfifo.c

kfifo: Use "const" definitions

2009-09-19 13:13:17 -07:00

kgdb.c

…

kmod.c

Revert "kmod: fix race in usermodehelper code"

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

kprobes.c

const: constify remaining file_operations

2009-10-01 16:11:11 -07:00

ksysfs.c

…

kthread.c

cpuset: fix the problem that cpuset_mem_spread_node() returns an offline node

2010-04-01 15:58:46 -07:00

latencytop.c

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lockdep_internals.h

lockdep: BFS cleanup

2009-07-24 10:53:29 +02:00

lockdep_proc.c

seq_file: constify seq_operations

2009-09-23 07:39:29 -07:00

lockdep_states.h

…

lockdep.c

lockdep: Use cpu_clock() for lockstat

2009-10-09 15:56:44 +02:00

Makefile

SLOW_WORK: Move slow_work's proc file to debugfs

2009-12-01 08:20:31 -08:00

module.c

module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y

2010-01-18 10:19:51 -08:00

mutex-debug.c

headers: remove sched.h from interrupt.h

2009-10-11 11:20:58 -07:00

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

nsproxy: extract create_nsproxy()

2009-06-18 13:03:56 -07:00

panic.c

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

2009-10-08 12:16:35 -07:00

params.c

param: fix setting arrays of bool

2009-10-29 08:56:20 +10:30

perf_event.c

perf_event: Fix oops triggered by cpu offline/online

2010-04-01 15:58:25 -07:00

pid_namespace.c

pidns: deny CLONE_PARENT|CLONE_NEWPID combination

2009-09-24 07:21:04 -07:00

pid.c

mm: also use alloc_large_system_hash() for the PID hash table

2009-09-22 07:17:38 -07:00

pm_qos_params.c

…

posix-cpu-timers.c

itimers: Add tracepoints for itimer

2009-08-29 14:10:07 +02:00

posix-timers.c

time: Introduce CLOCK_REALTIME_COARSE

2009-08-21 21:43:46 +02:00

printk.c

printk: add printk_delay to make messages readable for some scenarios

2009-09-23 07:39:28 -07:00

profile.c

kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file

2009-09-20 20:15:40 +02:00

ptrace.c

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

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

rcupdate.c

rcu: Move rcu_barrier() to rcutree

2009-10-07 08:11:20 +02:00

rcutorture.c

rcu: Clean up code to address Ingo's checkpatch feedback

2009-09-23 19:46:30 +02:00

rcutree_plugin.h

rcu: Remove inline from forward-referenced functions

2009-12-18 14:03:04 -08:00

rcutree_trace.c

rcu: Make hot-unplugged CPU relinquish its own RCU callbacks

2009-10-07 08:11:20 +02:00

rcutree.c

rcu: Fix note_new_gpnum() uses of ->gpnum

2009-12-18 14:03:01 -08:00

rcutree.h

rcu: Remove inline from forward-referenced functions

2009-12-18 14:03:04 -08:00

relay.c

const: mark struct vm_struct_operations

2009-09-27 11:39:25 -07:00

res_counter.c

memcg: some modification to softlimit under hierarchical memory reclaim.

2009-10-01 16:11:13 -07:00

resource.c

walk system ram range

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

rtmutex_common.h

…

rtmutex-debug.c

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rtmutex-debug.h

…

rtmutex-tester.c

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rtmutex.c

rtmutex: Avoid deadlock in rt_mutex_start_proxy_lock()

2009-08-06 05:50:21 +02:00

rtmutex.h

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rwsem.c

…

sched_clock.c

sched: Fix cpu_clock() in NMIs, on !CONFIG_HAVE_UNSTABLE_SCHED_CLOCK

2010-01-22 15:18:30 -08:00

sched_cpupri.c

sched: Add new prio to cpupri before removing old prio

2009-08-02 14:26:09 +02:00

sched_cpupri.h

…

sched_debug.c

sched: Rate-limit newidle

2009-12-18 14:03:13 -08:00

sched_fair.c

sched: Fix missing sched tunable recalculation on cpu add/remove

2010-01-28 15:01:11 -08:00

sched_features.h

sched: Add new wakeup preemption mode: WAKEUP_RUNNING

2009-09-17 10:17:25 +02:00

sched_idletask.c

sched: Simplify sys_sched_rr_get_interval() system call

2009-09-21 09:53:55 +02:00

sched_rt.c

sched: Simplify sys_sched_rr_get_interval() system call

2009-09-21 09:53:55 +02:00

sched_stats.h

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sched.c

sched: Fix a race between ttwu() and migrate_task()

2010-04-26 07:41:33 -07:00

seccomp.c

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semaphore.c

…

signal.c

kernel/signal.c: fix kernel information leak with print-fatal-signals=1

2010-01-18 10:19:33 -08:00

slow-work-debugfs.c

SLOW_WORK: Move slow_work's proc file to debugfs

2009-12-01 08:20:31 -08:00

slow-work.c

SLOW_WORK: Move slow_work's proc file to debugfs

2009-12-01 08:20:31 -08:00

slow-work.h

SLOW_WORK: Move slow_work's proc file to debugfs

2009-12-01 08:20:31 -08:00

smp.c

cpumask: remove arch_send_call_function_ipi

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

softirq.c

softirq: add BLOCK_IOPOLL to softirq_to_name

2009-09-17 15:53:44 -04:00

softlockup.c

softlockup: Stop spurious softlockup messages due to overflow

2010-04-01 15:58:47 -07:00

spinlock.c

locking: Allow arch-inlined spinlocks

2009-08-31 18:08:50 +02:00

srcu.c

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stacktrace.c

…

stop_machine.c

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sys_ni.c

Merge branch 'master' of /home/davem/src/GIT/linux-2.6/

2009-09-24 15:13:11 -07:00

sys.c

Merge branch 'hwpoison-2.6.32' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6

2009-10-29 08:20:00 -07:00

sysctl_check.c

NET: fix oops at bootime in sysctl code

2010-02-09 04:51:02 -08:00

sysctl.c

kernel/sysctl.c: fix stable merge error in NOMMU mmap_min_addr

2010-01-18 10:19:49 -08:00

taskstats.c

genetlink: make netns aware

2009-07-12 14:03:27 -07:00

test_kprobes.c

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time.c

time: Prevent 32 bit overflow with set_normalized_timespec()

2009-09-15 10:17:30 +02:00

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

trivial: fix typo "to to" in multiple files

2009-09-21 15:14:55 +02:00

tsacct.c

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uid16.c

headers: utsname.h redux

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

up.c

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user_namespace.c

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user.c

uids: Prevent tear down race

2009-11-02 16:02:39 +01:00

utsname_sysctl.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

utsname.c

utsns: extract creeate_uts_ns()

2009-06-18 13:03:55 -07:00

wait.c

locking, sched: Give waitqueue spinlocks their own lockdep classes

2009-08-10 14:43:09 +02:00

workqueue.c

workqueue: fix race condition in schedule_on_each_cpu()

2009-11-17 17:40:33 -08:00