From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Nikolay Borisov <kernel@kyup.com>,
"Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>
Cc: Jiri Slaby <jslaby@suse.cz>, Oleg Nesterov <oleg@redhat.com>,
tglx@linutronix.de,
SiteGround Operations <operations@siteground.com>
Subject: Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code
Date: Thu, 04 Feb 2016 13:27:17 +0100 [thread overview]
Message-ID: <1454588837.3407.148.camel@gmail.com> (raw)
In-Reply-To: <56B34233.5010804@kyup.com>
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
prev parent reply other threads:[~2016-02-04 12:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-03 10:58 crash in 3.12.51 (likely in 3.12.52 as well) in timer code Nikolay Borisov
2016-02-04 8:56 ` Thomas Gleixner
2016-02-04 11:32 ` Mike Galbraith
2016-02-04 11:51 ` Nikolay Borisov
2016-02-04 12:17 ` Mike Galbraith
2016-02-04 12:21 ` Nikolay Borisov
2016-02-04 12:27 ` Mike Galbraith [this message]
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