linux-kernel - Re: Random panic in load

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Date:	Tue, 22 Jul 2014 15:13:03 +0900
From:	Michel Dänzer <michel@...nzer.net>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: Random panic in load_balance() with 3.16-rc

On 18.07.2014 18:29, Michel Dänzer wrote:
> On 17.07.2014 16:58, Peter Zijlstra wrote:
>> On Thu, Jul 17, 2014 at 04:31:04PM +0900, Michel Dänzer wrote:
>>>
>>> I've been running into the panic captured in the attached picture (hope
>>> it's legible) randomly while running 3.16-rc4 and -rc5. I haven't
>>> noticed any pattern as to when it happens; at least once it happened
>>> while the box was basically sitting idle.
>>>
>>> dmesg, .config and /proc/cpuinfo attached as well; let me know if you
>>> need anything else.
>>
>> Does lkml.kernel.org/r/20140716145546.GA6922@...ff.to cure things?
> 
> Yes, adding back
> 
>                cpumask_clear(sched_group_cpus(sg));
> 
> seems to do the trick, thanks.

I'm afraid it happened again with 3.16-rc5 plus the above change. It
seemed to last longer than before, but maybe that was just luck.

Going to try 3.16-rc6 now.


-- 
Earthling Michel Dänzer            |                  http://www.amd.com
Libre software enthusiast          |                Mesa and X developer


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