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Merge branch 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

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Pull workqueue update from Tejun Heo:
 "Workqueue changes for v4.5.  One cleanup patch and three to improve
  the debuggability.

  Workqueue now has a stall detector which dumps workqueue state if any
  worker pool hasn't made forward progress over a certain amount of time
  (30s by default) and also triggers a warning if a workqueue which can
  be used in memory reclaim path tries to wait on something which can't
  be.

  These should make workqueue hangs a lot easier to debug."

* 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: simplify the apply_workqueue_attrs_locked()
  workqueue: implement lockup detector
  watchdog: introduce touch_softlockup_watchdog_sched()
  workqueue: warn if memory reclaim tries to flush !WQ_MEM_RECLAIM workqueue
This commit is contained in:
Linus Torvalds
2016-01-11 18:53:13 -08:00
parent 3d116a66ed 6201171e3b
commit 0f8c790103
8 changed files with 261 additions and 15 deletions
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6
kernel/time/tick-sched.c
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@@ -143,7 +143,7 @@ static void tick_sched_handle(struct tick_sched *ts, struct pt_regs *regs)
* when we go busy again does not account too much ticks.
*/
if (ts->tick_stopped) {
touch_softlockup_watchdog();
touch_softlockup_watchdog_sched();
if (is_idle_task(current))
ts->idle_jiffies++;
}
@@ -430,7 +430,7 @@ static void tick_nohz_update_jiffies(ktime_t now)
tick_do_update_jiffies64(now);
local_irq_restore(flags);
touch_softlockup_watchdog();
touch_softlockup_watchdog_sched();
}
/*
@@ -717,7 +717,7 @@ static void tick_nohz_restart_sched_tick(struct tick_sched *ts, ktime_t now, int
update_cpu_load_nohz(active);
calc_load_exit_idle();
touch_softlockup_watchdog();
touch_softlockup_watchdog_sched();
/*
* Cancel the scheduled timer and restore the tick
*/