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

From: Mike Galbraith
Date: Thu Feb 04 2016 - 07:27:30 EST


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