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Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code

From Mike Galbraith <umgwanakikbuti@gmail.com>
Newsgroups linux.kernel
Subject Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code
Date 2016-02-04 13:30 +0100
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On Thu, 2016-02-04 at 14:21 +0200, Nikolay Borisov wrote:

> > > On a different note - is there a way to safely reproduce this so I can
> > > test the suggested fix by Thomas?
> > 
> > Hm, write a module to beat mod_delayed_work() to pulp with a NR_CPUS
> > horde, and run it in a vm where you don't care about shrapnel?
> 
> In other words, have multiple threads (NR_CPUS) that spin on
> mod_delayed_work?

Yeah, give threads lots of opportunities to collide. (not forgetting to
sleep at least occasionally;)

	-Mike

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Thread

crash in 3.12.51 (likely in 3.12.52 as well) in timer code Nikolay Borisov <kernel@kyup.com> - 2016-02-03 12:00 +0100
  Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Thomas Gleixner <tglx@linutronix.de> - 2016-02-04 10:00 +0100
  Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-02-04 12:40 +0100
    Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Nikolay Borisov <kernel@kyup.com> - 2016-02-04 13:00 +0100
      Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-02-04 13:20 +0100
        Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-02-04 13:30 +0100
        Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Nikolay Borisov <kernel@kyup.com> - 2016-02-04 13:30 +0100

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