Peter Zijlstra e5d981df9a sched/core: Fix cpu.max vs. cpuhotplug deadlock ...

commit ce48c14649 upstream

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-12-05 19:41:17 +01:00

..

acpi

ACPI / EC: Fix regression related to PM ops support in ECDT device

2017-12-05 11:26:33 +01:00

asm-generic

ioremap: Update pgtable free interfaces with addr

2018-08-17 21:01:11 +02:00

clocksource

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

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

crypto

crypto: vmac - separate tfm and request context

2018-08-17 21:01:10 +02:00

drm

drm/edid: VSDB yCBCr420 Deep Color mode bit definitions

2018-11-10 07:48:35 -08:00

dt-bindings

dt-bindings: clock: mediatek: add binding for fixed-factor clock axisel_d4

2018-04-24 09:36:34 +02:00

keys

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

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

kvm

arm/arm64: KVM: Add PSCI version selection API

2018-05-01 12:58:27 -07:00

linux

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

2018-12-05 19:41:17 +01:00

math-emu

…

media

media: v4l: event: Prevent freeing event subscriptions while accessed

2018-10-03 17:01:00 -07:00

memory

…

misc

…

net

tls: Fix TLS ulp context leak, when TLS_TX setsockopt is not used.

2018-12-05 19:41:10 +01:00

pcmcia

…

ras

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

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

rdma

IB/hfi1: Optimize kthread pointer locking when queuing CQ entries

2018-07-03 11:24:54 +02:00

scsi

scsi: core: introduce force_blk_mq

2018-08-15 18:12:47 +02:00

soc

memory: tegra: Apply interrupts mask per SoC

2018-08-03 07:50:38 +02:00

sound

sound: don't call skl_init_chip() to reset intel skl soc

2018-10-18 09:16:22 +02:00

target

target: Avoid early CMD_T_PRE_EXECUTE failures during ABORT_TASK

2017-11-30 08:40:51 +00:00

trace

sched/debug: Fix task state recording/printout

2018-08-17 21:01:11 +02:00

uapi

btrfs: Add sanity check for EXTENT_DATA when reading out leaf

2018-12-05 19:41:11 +01:00

video

udlfb: set optimal write delay

2018-09-09 19:56:01 +02:00

xen

CONFIG_XEN_PV breaks xen_create_contiguous_region on ARM

2018-11-21 09:24:17 +01:00