Andrey Ryabinin 57675cb976 kernel/sysrq, watchdog, sched/core: Reset watchdog on all CPUs while processing sysrq-w ...

Lengthy output of sysrq-w may take a lot of time on slow serial console.

Currently we reset NMI-watchdog on the current CPU to avoid spurious
lockup messages. Sometimes this doesn't work since softlockup watchdog
might trigger on another CPU which is waiting for an IPI to proceed.
We reset softlockup watchdogs on all CPUs, but we do this only after
listing all tasks, and this may be too late on a busy system.

So, reset watchdogs CPUs earlier, in for_each_process_thread() loop.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/1465474805-14641-1-git-send-email-aryabinin@virtuozzo.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-06-14 12:48:38 +02:00

..

auto_group.c

sched/core: Move the sched_to_prio[] arrays out of line

2015-12-04 10:34:46 +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: Make local_clock()/cpu_clock() inline

2016-04-13 12:25:22 +02:00

completion.c

…

core.c

kernel/sysrq, watchdog, sched/core: Reset watchdog on all CPUs while processing sysrq-w

2016-06-14 12:48:38 +02:00

cpuacct.c

sched/cpuacct: Check for NULL when using task_pt_regs()

2016-04-13 13:22:37 +02:00

cpuacct.h

sched/cpuacct: Simplify the cpuacct code

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

cpudeadline.c

sched/core: Use tsk_cpus_allowed() instead of accessing ->cpus_allowed

2016-05-12 09:55:35 +02:00

cpudeadline.h

sched/deadline: Unify dl_time_before() usage

2015-09-23 09:51:25 +02:00

cpufreq_schedutil.c

cpufreq: schedutil: Improve prints messages with pr_fmt

2016-05-19 01:02:52 +02:00

cpufreq.c

cpufreq: sched: Helpers to add and remove update_util hooks

2016-04-02 01:08:43 +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

…

cputime.c

sched/cputime: Fix steal_account_process_tick() to always return jiffies

2016-03-08 12:24:56 +01:00

deadline.c

sched/core: Provide a tsk_nr_cpus_allowed() helper

2016-05-12 09:55:36 +02:00

debug.c

sched/debug: Fix /proc/sched_debug regression

2016-06-08 14:31:58 +02:00

fair.c

sched/debug: Fix deadlock when enabling sched events

2016-06-14 12:47:21 +02:00

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

locking/lockdep, sched/core: Implement a better lock pinning scheme

2016-05-05 09:23:59 +02:00

idle.c

cpuidle: Do not access cpuidle_devices when !CONFIG_CPU_IDLE

2016-06-02 23:05:27 +02:00

loadavg.c

sched/loadavg: Fix loadavg artifacts on fully idle and on fully loaded systems

2016-05-12 09:55:34 +02:00

Makefile

cpufreq: schedutil: New governor based on scheduler utilization data

2016-04-02 01:09:12 +02:00

rt.c

sched/core: Provide a tsk_nr_cpus_allowed() helper

2016-05-12 09:55:36 +02:00

sched.h

Merge tag 'pm-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2016-05-16 19:17:22 -07:00

stats.c

…

stats.h

sched/debug: Fix /proc/sched_debug regression

2016-06-08 14:31:58 +02:00

stop_task.c

locking/lockdep, sched/core: Implement a better lock pinning scheme

2016-05-05 09:23:59 +02:00

swait.c

wait.[ch]: Introduce the simple waitqueue (swait) implementation

2016-02-25 11:27:16 +01:00

wait.c

sched/wait: Fix the signal handling fix

2015-12-13 14:30:59 -08:00