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Re: [PATCH] workqueue: warn if memory reclaim tries to flush !WQ_MEM_RECLAIM workqueue

From Tejun Heo <tj@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH] workqueue: warn if memory reclaim tries to flush !WQ_MEM_RECLAIM workqueue
Date 2015-12-07 17:00 +0100
Message-ID <qD6mL-6tX-45@gated-at.bofh.it> (permalink)
References (2 earlier) <qByZP-3zg-15@gated-at.bofh.it> <qBDmN-6pd-21@gated-at.bofh.it> <qBDGa-6Nq-19@gated-at.bofh.it> <qBDGa-6Nq-17@gated-at.bofh.it> <qBHJL-QO-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Thu, Dec 03, 2015 at 02:26:16PM -0500, Tejun Heo wrote:
> Task or work item involved in memory reclaim trying to flush a
> non-WQ_MEM_RECLAIM workqueue or one of its work items can lead to
> deadlock.  Trigger WARN_ONCE() if such conditions are detected.
> 
> Signed-off-by: Tejun Heo <tj@kernel.org>
> Cc: Peter Zijlstra <peterz@infradead.org>

Applied to wq/for-4.5.

-- 
tejun
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Thread

[PATCH 1/2] watchdog: introduce touch_softlockup_watchdog_sched() Tejun Heo <tj@kernel.org> - 2015-12-03 01:30 +0100
  [PATCH 2/2] workqueue: implement lockup detector Tejun Heo <tj@kernel.org> - 2015-12-03 01:30 +0100
    Re: [PATCH 2/2] workqueue: implement lockup detector Tejun Heo <tj@kernel.org> - 2015-12-03 15:50 +0100
    Re: [PATCH 2/2] workqueue: implement lockup detector Don Zickus <dzickus@redhat.com> - 2015-12-03 19:00 +0100
      Re: [PATCH 2/2] workqueue: implement lockup detector Tejun Heo <tj@kernel.org> - 2015-12-03 20:50 +0100
        Re: [PATCH 2/2] workqueue: implement lockup detector Ulrich Obergfell <uobergfe@redhat.com> - 2015-12-03 21:20 +0100
          Re: [PATCH 2/2] workqueue: implement lockup detector Tejun Heo <tj@kernel.org> - 2015-12-03 22:00 +0100
            Re: [PATCH 2/2] workqueue: implement lockup detector Ingo Molnar <mingo@kernel.org> - 2015-12-04 09:10 +0100
              Re: [PATCH 2/2] workqueue: implement lockup detector Don Zickus <dzickus@redhat.com> - 2015-12-04 18:00 +0100
            Re: [PATCH 2/2] workqueue: implement lockup detector Ulrich Obergfell <uobergfe@redhat.com> - 2015-12-04 14:30 +0100
    [PATCH v2 2/2] workqueue: implement lockup detector Tejun Heo <tj@kernel.org> - 2015-12-07 20:10 +0100
      Re: [PATCH v2 2/2] workqueue: implement lockup detector Tejun Heo <tj@kernel.org> - 2015-12-07 22:40 +0100
        Re: [PATCH v2 2/2] workqueue: implement lockup detector Don Zickus <dzickus@redhat.com> - 2015-12-08 17:10 +0100
          Re: [PATCH v2 2/2] workqueue: implement lockup detector Tejun Heo <tj@kernel.org> - 2015-12-08 17:40 +0100
      Re: [PATCH v2 2/2] workqueue: implement lockup detector Don Zickus <dzickus@redhat.com> - 2015-12-07 22:40 +0100
  Re: [PATCH 1/2] watchdog: introduce touch_softlockup_watchdog_sched() Peter Zijlstra <peterz@infradead.org> - 2015-12-03 10:40 +0100
    Re: [PATCH 1/2] watchdog: introduce touch_softlockup_watchdog_sched() Peter Zijlstra <peterz@infradead.org> - 2015-12-03 11:10 +0100
      Re: [PATCH 1/2] watchdog: introduce touch_softlockup_watchdog_sched() Tejun Heo <tj@kernel.org> - 2015-12-03 15:50 +0100
        Re: [PATCH 1/2] watchdog: introduce touch_softlockup_watchdog_sched() Tejun Heo <tj@kernel.org> - 2015-12-03 16:10 +0100
          [PATCH] workqueue: warn if memory reclaim tries to flush  !WQ_MEM_RECLAIM workqueue Tejun Heo <tj@kernel.org> - 2015-12-03 20:30 +0100
            Re: [PATCH] workqueue: warn if memory reclaim tries to flush  !WQ_MEM_RECLAIM workqueue Peter Zijlstra <peterz@infradead.org> - 2015-12-03 21:50 +0100
              Re: [PATCH] workqueue: warn if memory reclaim tries to flush  !WQ_MEM_RECLAIM workqueue Tejun Heo <tj@kernel.org> - 2015-12-03 22:00 +0100
                Re: [PATCH] workqueue: warn if memory reclaim tries to flush  !WQ_MEM_RECLAIM workqueue Peter Zijlstra <peterz@infradead.org> - 2015-12-03 22:10 +0100
                Re: [PATCH] workqueue: warn if memory reclaim tries to flush  !WQ_MEM_RECLAIM workqueue Tejun Heo <tj@kernel.org> - 2015-12-03 23:10 +0100
                Re: [PATCH] workqueue: warn if memory reclaim tries to flush  !WQ_MEM_RECLAIM workqueue Peter Zijlstra <peterz@infradead.org> - 2015-12-04 14:00 +0100
            Re: [PATCH] workqueue: warn if memory reclaim tries to flush  !WQ_MEM_RECLAIM workqueue Tejun Heo <tj@kernel.org> - 2015-12-07 17:00 +0100
        Re: [PATCH 1/2] watchdog: introduce touch_softlockup_watchdog_sched() Peter Zijlstra <peterz@infradead.org> - 2015-12-03 16:10 +0100

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