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1b1d62254d
linux/kernel/sched
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Peter Zijlstra 1b1d62254d sched/core: Add missing update_rq_clock() call in sched_move_task() 
Bug was noticed via this warning:

  WARNING: CPU: 6 PID: 1 at kernel/sched/sched.h:804 detach_task_cfs_rq+0x8e8/0xb80
  rq->clock_update_flags < RQCF_ACT_SKIP
  Modules linked in:
  CPU: 6 PID: 1 Comm: systemd Not tainted 4.10.0-rc5-00140-g0874170baf55-dirty #1
  Hardware name: Supermicro SYS-4048B-TRFT/X10QBi, BIOS 1.0 04/11/2014
  Call Trace:
   dump_stack+0x4d/0x65
   __warn+0xcb/0xf0
   warn_slowpath_fmt+0x5f/0x80
   detach_task_cfs_rq+0x8e8/0xb80
   ? allocate_cgrp_cset_links+0x59/0x80
   task_change_group_fair+0x27/0x150
   sched_change_group+0x48/0xf0
   sched_move_task+0x53/0x150
   cpu_cgroup_attach+0x36/0x70
   cgroup_taskset_migrate+0x175/0x300
   cgroup_migrate+0xab/0xd0
   cgroup_attach_task+0xf0/0x190
   __cgroup_procs_write+0x1ed/0x2f0
   cgroup_procs_write+0x14/0x20
   cgroup_file_write+0x3f/0x100
   kernfs_fop_write+0x104/0x180
   __vfs_write+0x37/0x140
   vfs_write+0xb8/0x1b0
   SyS_write+0x55/0xc0
   do_syscall_64+0x61/0x170
   entry_SYSCALL64_slow_path+0x25/0x25

Reported-by: Ingo Molnar <mingo@kernel.org>
Reported-by: Borislav Petkov <bp@alien8.de>
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>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-30 11:46:34 +01:00
..
auto_group.c sched/autogroup: Fix 64-bit kernel nice level adjustment 2016-11-24 05:45:02 +01:00
auto_group.h sched, timer: Convert usages of ACCESS_ONCE() in the scheduler to READ_ONCE()/WRITE_ONCE() 2015-05-08 12:11:32 +02:00
clock.c sched/clock: Fix hotplug crash 2017-01-20 02:38:46 +01:00
completion.c sched/completions: Fix complete_all() semantics 2017-01-14 11:30:01 +01:00
core.c sched/core: Add missing update_rq_clock() call in sched_move_task() 2017-01-30 11:46:34 +01:00
cpuacct.c sched/cpuacct: Avoid %lld seq_printf warning 2016-11-16 10:29:03 +01:00
cpuacct.h sched/cpuacct: Simplify the cpuacct code 2016-03-21 11:00:28 +01:00
cpudeadline.c sched/deadline: Split cpudl_set() into cpudl_set() and cpudl_clear() 2016-09-05 13:29:43 +02:00
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: Rectify comment in sugov_irq_work() function 2016-11-24 21:50:59 +01:00
cpufreq.c cpufreq / sched: Pass flags to cpufreq_update_util() 2016-08-16 22:14:55 +02:00
cpupri.c sched/core: Use tsk_cpus_allowed() instead of accessing ->cpus_allowed 2016-05-12 09:55:35 +02:00
cpupri.h sched/cpupri: Remove unnecessary definitions in cpupri.h 2014-11-16 10:58:59 +01:00
cputime.c sched/cputime: Rename vtime_account_user() to vtime_flush() 2017-01-14 09:54:13 +01:00
deadline.c sched/core: Add wrappers for lockdep_(un)pin_lock() 2017-01-14 11:29:30 +01:00
debug.c sched/deadline: Show leftover runtime and abs deadline in /proc/*/sched 2017-01-14 11:30:00 +01:00
fair.c sched/fair: Explain why MIN_SHARES isn't scaled in calc_cfs_shares() 2017-01-14 11:30:02 +01:00
features.h sched/fair: Convert arch_scale_cpu_capacity() from weak function to #define 2015-09-13 09:52:55 +02:00
idle_task.c sched/core: Add wrappers for lockdep_(un)pin_lock() 2017-01-14 11:29:30 +01:00
idle.c sched/idle: Add support for tasks that inject idle 2016-11-29 14:02:21 +01:00
loadavg.c sched/core: Correct off by one bug in load migration calculation 2016-07-13 14:58:20 +02:00
Makefile cpufreq: schedutil: New governor based on scheduler utilization data 2016-04-02 01:09:12 +02:00
rt.c sched/core: Add wrappers for lockdep_(un)pin_lock() 2017-01-14 11:29:30 +01:00
sched.h sched/core: Add debugging code to catch missing update_rq_clock() calls 2017-01-14 11:29:35 +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/debug: Rename 'schedstat_val()' -> 'schedstat_val_or_zero()' 2016-09-05 13:29:46 +02:00
stop_task.c sched/core: Add wrappers for lockdep_(un)pin_lock() 2017-01-14 11:29:30 +01:00
swait.c wait.[ch]: Introduce the simple waitqueue (swait) implementation 2016-02-25 11:27:16 +01:00
wait.c mm: remove per-zone hashtable of bitlock waitqueues 2016-10-27 09:27:57 -07:00