linux-kernel - Re: Random panic in load

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Message-ID: <53D21D6C.2050406@daenzer.net>
Date:	Fri, 25 Jul 2014 18:03:40 +0900
From:	Michel Dänzer <michel@...nzer.net>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jakub Jelinek <jakub@...hat.com>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	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 25.07.2014 17:15, Linus Torvalds wrote:
> On Thu, Jul 24, 2014 at 11:48 PM, Jakub Jelinek <jakub@...hat.com> wrote:
>>
>> Can I ask anyone involved in this for preprocessed source and all gcc command
>> line options to reproduce it, best in the form of a http://gcc.gnu.org/bugzilla/
>> bugreport?
> 
> I've created bug 61904 for this:
> 
>   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61904
> 
> Note that I don't personally have a reproducer (my machine has
> gcc-4.8.3, and I don't see the same behavior), but I included the
> incorrect fair.s file that Michel sent me (which has all the command
> line options in it), and a pre-processed "fair.i" source file that I
> generated and that *should* match the configuration that was the
> source for that result. So there might be some version/configuration
> skew there between the two files, but I think they match.

Thank you Linus for tracking down the problem and filing the bug report!
I would have done the latter as well, but I could only have channeled
your analysis anyway. :)


> Holler if you cannot reproduce the problem based on that.

Likewise. I can create a GCC bugzilla account and add myself to the CC
list if that helps.

FWIW though, the fair.i file you attached is basically identical to what
I'm getting, the only difference being a handful of file path strings.


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