Wanpeng Li d7921a5dda sched/core: Fix rq lock pinning warning after call balance callbacks ...

This can be reproduced by running rt-migrate-test:

 WARNING: CPU: 2 PID: 2195 at kernel/locking/lockdep.c:3670 lock_unpin_lock()
 unpinning an unpinned lock
 ...
 Call Trace:
  dump_stack()
  __warn()
  warn_slowpath_fmt()
  lock_unpin_lock()
  __balance_callback()
  __schedule()
  schedule()
  futex_wait_queue_me()
  futex_wait()
  do_futex()
  SyS_futex()
  do_syscall_64()
  entry_SYSCALL64_slow_path()

Revert the rq_lock_irqsave() usage here, the whole point of the
balance_callback() was to allow dropping rq->lock.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 8a8c69c32778 ("sched/core: Add rq->lock wrappers")
Link: http://lkml.kernel.org/r/1489718719-3951-1-git-send-email-wanpeng.li@hotmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2017-03-23 07:44:51 +01:00

..

autogroup.c

sched/autogroup: Rename auto_group.[ch] to autogroup.[ch]

2017-02-08 09:01:11 +01:00

autogroup.h

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/autogroup.h>

2017-03-02 08:42:28 +01:00

clock.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/nmi.h>

2017-03-02 08:42:30 +01:00

completion.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>

2017-03-02 08:42:34 +01:00

core.c

sched/core: Fix rq lock pinning warning after call balance callbacks

2017-03-23 07:44:51 +01:00

cpuacct.c

sched/cputime: Convert kcpustat to nsecs

2017-02-01 09:13:47 +01:00

cpuacct.h

sched/cpuacct: Simplify the cpuacct code

2016-03-21 11:00:28 +01:00

cpudeadline.c

sched/core: Remove the tsk_cpus_allowed() wrapper

2017-03-02 08:42:24 +01:00

cpudeadline.h

sched/deadline: Split cpudl_set() into cpudl_set() and cpudl_clear()

2016-09-05 13:29:43 +02:00

cpufreq_schedutil.c

cpufreq: schedutil: Pass sg_policy to get_next_freq()

2017-03-05 23:58:48 +01:00

cpufreq.c

cpufreq / sched: Pass flags to cpufreq_update_util()

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

cpupri.c

sched/core: Remove the tsk_cpus_allowed() wrapper

2017-03-02 08:42:24 +01:00

cpupri.h

sched/cpupri: Remove unnecessary definitions in cpupri.h

2014-11-16 10:58:59 +01:00

cputime.c

sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>

2017-03-02 08:42:39 +01:00

deadline.c

sched/deadline: Use deadline instead of period when calculating overflow

2017-03-16 09:37:38 +01:00

debug.c

sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>

2017-03-02 08:42:38 +01:00

fair.c

sched/core: Fix double update_rq_clock) calls in attach_task()/detach_task()

2017-03-16 09:46:25 +01:00

features.h

sched/core: Add WARNING for multiple update_rq_clock() calls

2017-03-16 09:46:21 +01:00

idle_task.c

sched/core: Add wrappers for lockdep_(un)pin_lock()

2017-01-14 11:29:30 +01:00

idle.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/idle.h>

2017-03-02 08:42:26 +01:00

loadavg.c

sched/loadavg: Use {READ,WRITE}_ONCE() for sample window

2017-03-16 09:21:01 +01:00

Makefile

sched/autogroup: Rename auto_group.[ch] to autogroup.[ch]

2017-02-08 09:01:11 +01:00

rt.c

sched/rt: Add comments describing the RT IPI pull method

2017-03-16 09:41:35 +01:00

sched.h

sched/core: Add {EN,DE}QUEUE_NOCLOCK flags

2017-03-16 09:46:23 +01:00

stats.c

sched: use %*pb[l] to print bitmaps including cpumasks and nodemasks

2015-02-13 21:21:37 -08:00

stats.h

sched/headers: Move cputime functionality from <linux/sched.h> and <linux/cputime.h> into <linux/sched/cputime.h>

2017-03-03 01:45:22 +01:00

stop_task.c

sched/core: Add wrappers for lockdep_(un)pin_lock()

2017-01-14 11:29:30 +01:00

swait.c

sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>

2017-03-02 08:42:32 +01:00

topology.c

sched/topology: Split out scheduler topology code from core.c into topology.c

2017-02-07 10:58:12 +01:00

wait.c

sched/headers: fix up header file dependency on <linux/sched/signal.h>

2017-03-08 10:36:03 -08:00