Peter Zijlstra ce48c14649 sched/core: Fix cpu.max vs. cpuhotplug deadlock ...

Tejun reported the following cpu-hotplug lock (percpu-rwsem) read recursion:

  tg_set_cfs_bandwidth()
    get_online_cpus()
      cpus_read_lock()

    cfs_bandwidth_usage_inc()
      static_key_slow_inc()
        cpus_read_lock()

Reported-by: Tejun Heo <tj@kernel.org>
Tested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180122215328.GP3397@worktop
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2018-01-24 10:03:44 +01:00

..

autogroup.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

autogroup.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

clock.c

sched/clock, sched/cputime: Use lockdep to assert IRQs are disabled/enabled

2017-11-08 11:13:53 +01:00

completion.c

locking/lockdep: Remove cross-release leftovers

2018-01-08 17:30:45 +01:00

core.c

delayacct: Account blkio completion on the correct task

2018-01-16 03:29:36 +01:00

cpuacct.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

cpudeadline.c

sched/deadline: Change return value of cpudl_find()

2017-08-10 12:18:17 +02:00

cpudeadline.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

cpufreq_schedutil.c

cpufreq: schedutil: Use idle_calls counter of the remote CPU

2017-12-28 12:26:54 +01:00

cpufreq.c

cpufreq / sched: Pass flags to cpufreq_update_util()

2016-08-16 22:14:55 +02:00

cpupri.c

sched/cpupri: Don't re-initialize 'struct cpupri'

2017-08-10 12:18:14 +02:00

cpupri.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

cputime.c

Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2017-11-15 14:29:44 -08:00

deadline.c

Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2017-11-15 14:29:44 -08:00

debug.c

sched/fair: Propagate an effective runnable_load_avg

2017-09-29 19:35:15 +02:00

fair.c

sched/core: Fix cpu.max vs. cpuhotplug deadlock

2018-01-24 10:03:44 +01:00

features.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

idle_task.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

idle.c

sched/idle: Micro-optimize the idle loop

2017-10-26 08:31:29 +02:00

isolation.c

sched/isolation: Add basic isolcpus flags

2017-10-27 09:55:31 +02:00

loadavg.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Makefile

Merge branch 'linus' into sched/core, to pick up fixes

2017-11-08 10:17:15 +01:00

membarrier.c

membarrier: Disable preemption when calling smp_call_function_many()

2018-01-10 08:50:31 +01:00

rt.c

sched/rt: Do not pull from current CPU if only one CPU to pull

2017-12-15 16:28:02 +01:00

sched-pelt.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

sched.h

Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2017-11-15 14:29:44 -08:00

stats.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

stats.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

stop_task.c

Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2017-11-15 14:29:44 -08:00

swait.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

topology.c

Merge branch 'linus' into sched/core, to pick up fixes

2017-11-08 10:17:15 +01:00

wait_bit.c

Pass mode to wait_on_atomic_t() action funcs and provide default actions

2017-11-13 15:38:16 +00:00

wait.c

sched/wait: Fix add_wait_queue() behavioral change

2017-12-06 19:30:34 +01:00