linux-kernel - Re: Random panic in load

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Message-ID: <53CF80EE.5050702@daenzer.net>
Date:	Wed, 23 Jul 2014 18:31:26 +0900
From:	Michel Dänzer <michel@...nzer.net>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Random panic in load_balance() with 3.16-rc

On 23.07.2014 18:25, Peter Zijlstra wrote:
> On Wed, Jul 23, 2014 at 10:28:19AM +0200, Peter Zijlstra wrote:
> 
>> Of course, the other thing that patch did is clear sgp->power (now
>> sgc->capacity). 
> 
> Hmm, re-reading the thread there isn't a clear confirmation its this
> patch at all. Could you perhaps bisect this to either verify it is
> indeed that patch we're talking about:
> 
> caffcdd8d27b ("sched: Do not zero sg->cpumask and sg->sgp->power in build_sched_groups()")
> 
> or find which patch is causing this.

It can take a long time for the problem to occur, so I need to run at
least for one or two days to be at least somewhat sure a given kernel is
not affected.

I'll try reproducing the problem with your previous suggestions first,
but if I manage to do that, I guess there's no alternative to bisecting...


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