Mandeep Singh Baines fb5d2b4cfc cgroup: replace tasklist_lock with rcu_read_lock ...

We can replace the tasklist_lock in cgroup_attach_proc with an
rcu_read_lock().

Changes in V4:
* https://lkml.org/lkml/2011/12/23/284 (Frederic Weisbecker)
  * Minimize size of rcu_read_lock critical section
  * Add comment
* https://lkml.org/lkml/2011/12/26/136 (Li Zefan)
  * Split into two patches
Changes in V3:
* https://lkml.org/lkml/2011/12/22/419 (Frederic Weisbecker)
  * Add an rcu_read_lock to protect against exit
Changes in V2:
* https://lkml.org/lkml/2011/12/22/86 (Tejun Heo)
  * Use a goto instead of returning -EAGAIN

Suggested-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: containers@lists.linux-foundation.org
Cc: cgroups@vger.kernel.org
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul Menage <paul@paulmenage.org>

2012-01-20 15:58:13 -08:00

..

debug

module: struct module_ref should contains long fields

2012-01-13 09:32:14 +10:30

events

Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2012-01-09 12:59:24 -08:00

gcov

gcov: disable CONSTRUCTORS for UML

2011-07-26 16:49:45 -07:00

irq

module_param: make bool parameters really bool (core code)

2012-01-13 09:32:18 +10:30

power

PM / Hibernate: Drop the check of swap space size for compressed image

2012-01-14 00:41:37 +01:00

sched

Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-security

2012-01-14 18:36:33 -08:00

time

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2012-01-08 13:21:22 -08:00

trace

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

2012-01-15 11:26:35 -08:00

.gitignore

…

acct.c

Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2012-01-08 12:19:57 -08:00

async.c

kernel/async: remove redundant declaration.

2012-01-13 09:32:18 +10:30

audit_tree.c

audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()

2011-07-20 14:10:11 -07:00

audit_watch.c

kill path_lookup()

2011-03-14 09:15:23 -04:00

audit.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit

2012-01-17 16:41:31 -08:00

audit.h

audit: remove AUDIT_SETUP_CONTEXT as it isn't used

2012-01-17 16:16:57 -05:00

auditfilter.c

audit: allow interfield comparison in audit rules

2012-01-17 16:17:01 -05:00

auditsc.c

audit: no leading space in audit_log_d_path prefix

2012-01-17 16:17:04 -05:00

backtracetest.c

…

bounds.c

memcg: remove direct page_cgroup-to-page pointer

2011-03-23 19:46:28 -07:00

capability.c

Revert "capabitlies: ns_capable can use the cap helpers rather than lsm call"

2012-01-17 10:19:41 -08:00

cgroup_freezer.c

Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2012-01-09 12:59:24 -08:00

cgroup.c

cgroup: replace tasklist_lock with rcu_read_lock

2012-01-20 15:58:13 -08:00

compat.c

kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure

2011-10-31 19:30:05 -04:00

configs.c

kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n

2011-07-25 20:57:15 -07:00

cpu_pm.c

cpu_pm: call notifiers during suspend

2011-09-23 12:05:29 +05:30

cpu.c

Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2012-01-08 13:10:57 -08:00

cpuset.c

Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2012-01-09 12:59:24 -08:00

crash_dump.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

cred.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

delayacct.c

KVM: Steal time implementation

2011-07-14 12:59:14 +03:00

dma.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

elfcore.c

…

exec_domain.c

sys_personality: remove the bogus checks in sys_personality()->__set_personality() path

2010-08-09 20:45:05 -07:00

exit.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit

2012-01-17 16:41:31 -08:00

extable.c

extable, core_kernel_data(): Make sure all archs define _sdata

2011-05-20 08:56:56 +02:00

fork.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit

2012-01-17 16:41:31 -08:00

freezer.c

freezer: kill unused set_freezable_with_signal()

2011-11-23 09:28:17 -08:00

futex_compat.c

userns: user namespaces: convert several capable() calls

2011-03-23 19:47:08 -07:00

futex.c

futex: Fix uninterruptible loop due to gate_area

2011-12-31 11:48:28 -08:00

groups.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

hrtimer.c

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

2011-11-28 08:43:52 -08:00

hung_task.c

hung_task: fix false positive during vfork

2012-01-03 16:14:32 -08:00

irq_work.c

kernel: fix two implicit header assumptions in irq_work.c

2011-10-31 09:20:12 -04:00

itimer.c

[S390] cputime: add sparse checking and cleanup

2011-12-15 14:56:19 +01:00

jump_label.c

Merge remote-tracking branch 'tip/perf/core' into kvm-updates/3.3

2011-12-27 11:22:24 +02:00

kallsyms.c

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

2011-03-25 17:52:22 -07:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

arch:Kconfig.locks Remove unused config option.

2011-04-10 17:01:05 +02:00

Kconfig.preempt

sched: Isolate preempt counting in its own config option

2011-06-10 15:15:40 +02:00

kexec.c

kdump: crashk_res init check for /sys/kernel/kexec_crash_size

2012-01-12 20:13:11 -08:00

kfifo.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

kmod.c

Merge branch 'pm-sleep' into pm-for-linus

2011-12-25 23:42:20 +01:00

kprobes.c

kprobes: silence DEBUG_STRICT_USER_COPY_CHECKS=y warning

2012-01-12 20:13:02 -08:00

ksysfs.c

kernel: ksysfs.c is implicitly using stat.h

2011-10-31 09:20:13 -04:00

kthread.c

freezer: kill unused set_freezable_with_signal()

2011-11-23 09:28:17 -08:00

latencytop.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

lockdep_internals.h

lockdep: No need to disable preemption in debug atomic ops

2010-05-04 05:38:16 +02:00

lockdep_proc.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

lockdep_states.h

…

lockdep.c

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

2012-01-06 08:02:58 -08:00

Makefile

PM: Make sysrq-o be available for CONFIG_PM unset

2012-01-14 00:33:03 +01:00

module.c

error: implicit declaration of function 'module_flags_taint'

2012-01-15 16:21:07 -08:00

mutex-debug.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

mutex-debug.h

mutex: Use p->on_cpu for the adaptive spin

2011-04-14 08:52:33 +02:00

mutex.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

mutex.h

mutex: Use p->on_cpu for the adaptive spin

2011-04-14 08:52:33 +02:00

notifier.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

nsproxy.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

padata.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

panic.c

panic: don't print redundant backtraces on oops

2012-01-12 20:13:11 -08:00

params.c

module_param: avoid bool abuse, add bint for special cases.

2012-01-13 09:32:17 +10:30

pid_namespace.c

sysctl: add the kernel.ns_last_pid control

2012-01-12 20:13:11 -08:00

pid.c

sysctl: add the kernel.ns_last_pid control

2012-01-12 20:13:11 -08:00

posix-cpu-timers.c

[S390] cputime: add sparse checking and cleanup

2011-12-15 14:56:19 +01:00

posix-timers.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

printk.c

module_param: make bool parameters really bool (core code)

2012-01-13 09:32:18 +10:30

profile.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

ptrace.c

Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-security

2012-01-14 18:36:33 -08:00

range.c

range: fix bogus misuse of module.h to get printk()

2011-10-31 09:20:11 -04:00

rcu.h

rcu: Deconfuse dynticks entry-exit tracing

2011-12-11 10:31:42 -08:00

rcupdate.c

rcu: Detect illegal rcu dereference in extended quiescent state

2011-12-11 10:31:30 -08:00

rcutiny_plugin.h

rcu: Apply ACCESS_ONCE() to rcu_boost() return value

2011-12-11 10:33:19 -08:00

rcutiny.c

rcu: Augment rcu_batch_end tracing for idle and callback state

2011-12-11 10:32:22 -08:00

rcutorture.c

rcu: Add rcutorture tests for srcu_read_lock_raw()

2011-12-11 10:32:21 -08:00

rcutree_plugin.h

rcu: Apply ACCESS_ONCE() to rcu_boost() return value

2011-12-11 10:33:19 -08:00

rcutree_trace.c

rcu: Track idleness independent of idle tasks

2011-12-11 10:31:24 -08:00

rcutree.c

rcu: Augment rcu_batch_end tracing for idle and callback state

2011-12-11 10:32:22 -08:00

rcutree.h

rcu: Keep invoking callbacks if CPU otherwise idle

2011-12-11 10:32:09 -08:00

relay.c

switch debugfs to umode_t

2012-01-03 22:54:56 -05:00

res_counter.c

resource cgroups: remove bogus cast

2011-12-13 07:43:08 -08:00

resource.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

rtmutex_common.h

rtmutex: Simplify PI algorithm and make highest prio task get lock

2011-01-27 21:13:51 -05:00

rtmutex-debug.c

lockdep, rtmutex, bug: Show taint flags on error

2011-12-06 08:16:49 +01:00

rtmutex-debug.h

…

rtmutex-tester.c

rtmutex-tester: convert sysdev_class to a regular subsystem

2011-12-14 14:54:22 -08:00

rtmutex.c

Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"

2011-12-11 10:33:18 -08:00

rtmutex.h

…

rwsem.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

seccomp.c

seccomp: audit abnormal end to a process due to seccomp

2012-01-17 16:16:55 -05:00

semaphore.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

signal.c

user namespace: make signal.c respect user namespaces

2012-01-10 16:30:54 -08:00

smp.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

softirq.c

rcu: Fix early call to rcu_idle_enter()

2011-12-11 10:31:38 -08:00

spinlock.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

srcu.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

stacktrace.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

stop_machine.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

sys_ni.c

Cross Memory Attach

2011-10-31 17:30:44 -07:00

sys.c

c/r: prctl: add PR_SET_MM codes to set up mm_struct entries

2012-01-12 20:13:13 -08:00

sysctl_binary.c

binary_sysctl(): fix memory leak

2011-12-20 10:25:04 -08:00

sysctl_check.c

xfs: remove subdirectories

2011-08-12 16:21:35 -05:00

sysctl.c

x86: Panic on detection of stack overflow

2011-12-05 11:37:47 +01:00

taskstats.c

Make TASKSTATS require root access

2011-09-19 17:04:37 -07:00

test_kprobes.c

kprobes: Fix selftest to clear flags field for reusing probes

2010-10-14 08:55:27 +02:00

time.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

timeconst.pl

…

timer.c

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

2012-01-06 07:53:34 -08:00

tracepoint.c

tracepoints/module: Fix disabling tracepoints with taint CRAP or OOT

2012-01-16 11:35:57 -05:00

tsacct.c

[S390] cputime: add sparse checking and cleanup

2011-12-15 14:56:19 +01:00

uid16.c

userns: user namespaces: convert several capable() calls

2011-03-23 19:47:08 -07:00

up.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

user_namespace.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

user-return-notifier.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

user.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

utsname_sysctl.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

utsname.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

wait.c

lockdep/waitqueues: Add better annotation

2011-12-21 10:07:39 +01:00

watchdog.c

watchdog: move watchdog_*_all_cpus under CONFIG_SYSCTL

2011-10-31 17:30:53 -07:00

workqueue_sched.h

workqueue: implement concurrency managed dynamic worker pool

2010-06-29 10:07:14 +02:00

workqueue.c

workqueue: make alloc_workqueue() take printf fmt and args for name

2012-01-10 16:30:54 -08:00