Ben Segall 9d80092f8d sched: Fix race on toggling cfs_bandwidth_used ...

commit 1ee14e6c8c upstream.

When we transition cfs_bandwidth_used to false, any currently
throttled groups will incorrectly return false from cfs_rq_throttled.
While tg_set_cfs_bandwidth will unthrottle them eventually, currently
running code (including at least dequeue_task_fair and
distribute_cfs_runtime) will cause errors.

Fix this by turning off cfs_bandwidth_used only after unthrottling all
cfs_rqs.

Tested: toggle bandwidth back and forth on a loaded cgroup. Caused
crashes in minutes without the patch, hasn't crashed with it.

Signed-off-by: Ben Segall <bsegall@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: pjt@google.com
Link: http://lkml.kernel.org/r/20131016181611.22647.80365.stgit@sword-of-the-dawn.mtv.corp.google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Chris J Arges <chris.j.arges@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-01-15 15:28:54 -08:00

..

cpu

sched, idle: Fix the idle polling state logic

2013-11-29 11:11:42 -08:00

debug

kgdb/sysrq: fix inconstistent help message of sysrq key

2013-04-30 17:04:10 -07:00

events

perf: Fix perf ring buffer memory ordering

2013-11-20 12:27:47 -08:00

gcov

kernel/gcov: remove depends on CONFIG_EXPERIMENTAL

2013-01-11 11:39:33 -08:00

irq

irq: Enable all irqs unconditionally in irq_resume

2013-12-11 22:36:27 -08:00

power

PM / hibernate: Avoid overflow in hibernate_preallocate_memory()

2013-12-04 10:56:58 -08:00

sched

sched: Fix race on toggling cfs_bandwidth_used

2014-01-15 15:28:54 -08:00

time

time: Fix 1ns/tick drift w/ GENERIC_TIME_VSYSCALL_OLD

2013-12-11 22:36:27 -08:00

trace

ftrace: Initialize the ftrace profiler for each possible cpu

2014-01-09 12:24:20 -08:00

.gitignore

kernel/hz.bc: ignore.

2013-04-22 07:09:06 -07:00

acct.c

fs: Fix hang with BSD accounting on frozen filesystem

2013-05-04 14:57:58 -04:00

async.c

async: rename and redefine async_func_ptr

2013-03-12 13:59:14 -07:00

audit_tree.c

kernel/audit_tree.c:audit_add_tree_rule(): protect `rule' from kill_rules()

2013-06-12 16:29:46 -07:00

audit_watch.c

audit: catch possible NULL audit buffers

2013-01-11 14:54:55 -08:00

audit.c

audit: log the audit_names record type

2013-12-04 10:57:03 -08:00

audit.h

audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record

2013-12-04 10:57:03 -08:00

auditfilter.c

auditfilter.c: fix kernel-doc warnings

2013-05-24 16:22:52 -07:00

auditsc.c

audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record

2013-12-04 10:57:03 -08:00

backtracetest.c

…

bounds.c

…

capability.c

Add file_ns_capable() helper function for open-time capability checking

2013-04-14 10:06:31 -07:00

cgroup_freezer.c

cgroup: rename ->create/post_create/pre_destroy/destroy() to ->css_alloc/online/offline/free()

2012-11-19 08:13:38 -08:00

cgroup.c

cgroup: use a dedicated workqueue for cgroup destruction

2013-12-04 10:57:20 -08:00

compat.c

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

2013-05-01 07:21:43 -07:00

configs.c

proc: Supply PDE attribute setting accessor functions

2013-05-01 17:29:18 -04:00

context_tracking.c

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

2013-06-20 08:18:35 -10:00

cpu_pm.c

…

cpu.c

CPU hotplug: provide a generic helper to disable/enable CPU hotplug

2013-06-12 16:29:44 -07:00

cpuset.c

cpuset: Fix memory allocator deadlock

2013-12-04 10:57:16 -08:00

crash_dump.c

…

cred.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2012-12-18 10:55:28 -08:00

delayacct.c

cputime: Use accessors to read task cputime stats

2013-01-27 19:23:31 +01:00

dma.c

…

elfcore.c

…

exec_domain.c

…

exit.c

move exit_task_namespaces() outside of exit_notify()

2013-06-15 05:39:08 +04:00

extable.c

extable: Flip the sorting message

2013-04-15 13:25:16 +02:00

fork.c

mm: fix TLB flush race between migration, and change_protection_range

2014-01-09 12:24:23 -08:00

freezer.c

libata, freezer: avoid block device removal while system is frozen

2014-01-09 12:24:23 -08:00

futex_compat.c

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

2013-02-23 18:50:11 -08:00

futex.c

futex: fix handling of read-only-mapped hugepages

2013-12-20 07:45:08 -08:00

groups.c

…

hrtimer.c

hrtimers: Move SMP function call to thread context

2013-07-28 16:30:22 -07:00

hung_task.c

…

irq_work.c

Merge branch 'nohz/printk-v8' into irq/core

2013-02-05 00:48:46 +01:00

itimer.c

…

jump_label.c

…

kallsyms.c

kernel: kallsyms: memory override issue, need check destination buffer length

2013-04-15 15:17:26 +09:30

kcmp.c

kcmp: include linux/ptrace.h

2012-12-20 17:40:19 -08:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

…

Kconfig.preempt

…

kexec.c

PCI: Disable Bus Master only on kexec reboot

2013-12-20 07:45:08 -08:00

kmod.c

usermodehelper: check subprocess_info->path != NULL

2013-05-16 12:01:11 -07:00

kprobes.c

kprobes: Fix to free gone and unused optprobes

2013-05-28 10:37:59 +02:00

ksysfs.c

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

2012-12-11 18:10:49 -08:00

kthread.c

kthread: implement probe_kthread_data()

2013-04-30 17:04:02 -07:00

latencytop.c

…

lglock.c

…

lockdep_internals.h

…

lockdep_proc.c

…

lockdep_states.h

…

lockdep.c

Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block

2013-05-08 11:51:05 -07:00

Makefile

Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

2013-05-05 10:58:06 -07:00

modsign_certificate.S

CONFIG_SYMBOL_PREFIX: cleanup.

2013-03-15 15:09:43 +10:30

modsign_pubkey.c

keys: use keyring_alloc() to create module signing keyring

2012-12-20 17:40:21 -08:00

module_signing.c

MODSIGN: Don't use enum-type bitfields in module signature info block

2012-12-05 11:27:24 +10:30

module-internal.h

…

module.c

module: do percpu allocation after uniqueness check. No, really!

2013-07-13 11:42:26 -07:00

mutex-debug.c

…

mutex-debug.h

…

mutex.c

mutex: Back out architecture specific check for negative mutex count

2013-04-19 09:33:36 +02:00

mutex.h

…

notifier.c

…

nsproxy.c

proc: Split the namespace stuff out into linux/proc_ns.h

2013-05-01 17:29:39 -04:00

padata.c

padata: use __this_cpu_read per-cpu helper

2012-12-06 17:16:23 +08:00

panic.c

dump_stack: implement arch-specific hardware description in task dumps

2013-04-30 17:04:02 -07:00

params.c

params: Fix potential memory leak in add_sysfs_param()

2013-03-18 11:40:21 +00:00

pid_namespace.c

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

2013-05-01 17:51:54 -07:00

pid.c

pidns: Fix hang in zap_pid_ns_processes by sending a potentially extra wakeup

2013-09-26 17:18:27 -07:00

posix-cpu-timers.c

posix_timers: Fix pre-condition to stop the tick on full dynticks

2013-04-22 19:59:25 +02:00

posix-timers.c

posix-timers: Remove unused variable

2013-04-18 12:51:19 +02:00

printk.c

printk: Fix rq->lock vs logbuf_lock unlock lock inversion

2013-07-25 14:07:31 -07:00

profile.c

proc: Supply PDE attribute setting accessor functions

2013-05-01 17:29:18 -04:00

ptrace.c

exec/ptrace: fix get_dumpable() incorrect tests

2013-11-29 11:11:44 -08:00

range.c

range: Do not add new blank slot with add_range_with_merge

2013-06-18 11:32:10 -05:00

rcu.h

rcu: Provide RCU CPU stall warnings for tiny RCU

2013-01-28 22:06:21 -08:00

rcupdate.c

Merge branches 'doctorture.2013.01.29a', 'fixes.2013.01.26a', 'tagcb.2013.01.24a' and 'tiny.2013.01.29b' into HEAD

2013-01-28 22:25:21 -08:00

rcutiny_plugin.h

rcu: Provide RCU CPU stall warnings for tiny RCU

2013-01-28 22:06:21 -08:00

rcutiny.c

Merge branches 'doctorture.2013.01.29a', 'fixes.2013.01.26a', 'tagcb.2013.01.24a' and 'tiny.2013.01.29b' into HEAD

2013-01-28 22:25:21 -08:00

rcutorture.c

rcu: Allow rcutorture to be built at low optimization levels

2013-02-04 12:18:20 -08:00

rcutree_plugin.h

rcu: Don't allocate bootmem from rcu_init()

2013-05-15 10:41:12 -07:00

rcutree_trace.c

rcutrace: single_open() leaks

2013-05-05 00:16:35 -04:00

rcutree.c

rcu: Fix deadlock with CPU hotplug, RCU GP init, and timer migration

2013-06-10 13:37:12 -07:00

rcutree.h

rcu: Don't call wakeup() with rcu_node structure ->lock held

2013-06-10 13:37:11 -07:00

relay.c

Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block

2013-05-08 10:13:35 -07:00

res_counter.c

res_counter: return amount of charges after res_counter_uncharge()

2012-12-18 15:02:12 -08:00

resource.c

mem hotunplug: fix kfree() of bootmem memory

2013-04-29 15:54:40 -07:00

rtmutex_common.h

…

rtmutex-debug.c

sched/rt: Move rt specific bits into new header file

2013-02-07 20:51:08 +01:00

rtmutex-debug.h

…

rtmutex-tester.c

locking/rtmutex/tester: Set correct permissions on sysfs files

2013-04-10 14:48:37 +02:00

rtmutex.c

sched/rt: Move rt specific bits into new header file

2013-02-07 20:51:08 +01:00

rtmutex.h

…

rwsem.c

Revert "rw_semaphore: remove up/down_read_non_owner"

2013-03-23 15:53:52 -07:00

seccomp.c

seccomp: allow BPF_XOR based ALU instructions.

2013-03-26 11:07:19 +11:00

semaphore.c

semaphore: use `bool' type for semaphore_waiter's up

2013-04-30 17:04:08 -07:00

signal.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2013-05-01 14:08:52 -07:00

smp.c

kernel/smp.c: cleanups

2013-04-30 17:04:03 -07:00

smpboot.c

kthread: Prevent unpark race which puts threads on the wrong cpu

2013-04-12 14:18:43 +02:00

smpboot.h

…

softirq.c

irq: Force hardirq exit's softirq processing on its own stack

2013-10-13 16:08:34 -07:00

spinlock.c

…

srcu.c

srcu: use ACCESS_ONCE() to access sp->completed in srcu_read_lock()

2013-02-07 15:19:36 -08:00

stacktrace.c

…

stop_machine.c

stop_machine: Mark per cpu stopper enabled early

2013-02-26 22:25:17 +01:00

sys_ni.c

unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE

2013-05-09 13:46:38 -04:00

sys.c

reboot: rigrate shutdown/reboot to boot cpu

2013-06-12 16:29:44 -07:00

sysctl_binary.c

switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE

2013-05-09 14:53:20 -04:00

sysctl.c

mm: replace hardcoded 3% with admin_reserve_pages knob

2013-04-29 15:54:36 -07:00

task_work.c

…

taskstats.c

…

test_kprobes.c

kernel/: rename random32() to prandom_u32()

2013-04-29 18:28:42 -07:00

time.c

timekeeping: Use inject_offset in warp_clock

2013-03-15 16:50:20 -07:00

timeconst.bc

kernel: Replace timeconst.pl with a bc script

2013-02-16 23:17:25 +01:00

timer.c

timer: Fix jiffies wrap behavior of round_jiffies_common()

2013-07-21 18:21:31 -07:00

tracepoint.c

Merge tag 'trace-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2013-04-29 13:55:38 -07:00

tsacct.c

cputime: Use accessors to read task cputime stats

2013-01-27 19:23:31 +01:00

uid16.c

make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect

2013-03-03 22:58:33 -05:00

up.c

…

user_namespace.c

userns: limit the maximum depth of user_namespace->parent chain

2013-08-11 18:35:25 -07:00

user-return-notifier.c

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

user.c

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

2013-05-01 17:51:54 -07:00

utsname_sysctl.c

kernel/utsname_sysctl.c: put get/get_uts() into CONFIG_PROC_SYSCTL code block

2013-02-27 19:10:22 -08:00

utsname.c

proc: Split the namespace stuff out into linux/proc_ns.h

2013-05-01 17:29:39 -04:00

wait.c

propagate name change to comments in kernel source

2012-12-06 10:39:54 +01:00

watchdog.c

watchdog: Add comments to explain the watchdog_disabled variable

2013-03-14 08:24:05 +01:00

workqueue_internal.h

workqueue: include workqueue info when printing debug dump of a worker task

2013-04-30 17:04:02 -07:00

workqueue.c

workqueue: fix ordered workqueues in NUMA setups

2013-12-04 10:57:16 -08:00