linux-kernel - Re: [REGRESSION] 3.7-rc2 kernel BUG at kernel/power/snapshot.c:517!

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Date:	Wed, 31 Oct 2012 00:44:47 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	maciej.rutecki@...il.com
Cc:	wujianguo@...wei.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	jiang.liu@...wei.com, akpm@...ux-foundation.org,
	Petr Tesarik <ptesarik@...e.cz>
Subject: Re: [REGRESSION] 3.7-rc2 kernel BUG at kernel/power/snapshot.c:517!

On Tuesday, October 30, 2012 09:35:48 PM Maciej Rutecki wrote:
> On niedziela, 28 października 2012 o 22:45:26 Rafael J. Wysocki wrote:
> > On Sunday, October 28, 2012 10:12:49 PM Maciej Rutecki wrote:
> > > On niedziela, 21 października 2012 o 17:12:28 Maciej Rutecki wrote:
> > > > Error: kernel BUG at kernel/power/snapshot.c:517!
> > > > 
> > > > Last known good: 3.6.1
> > > > Bad: 3.7-rc2
> > > > 
> > > > Steps to reproduce:
> > > > 1. Boot system with 3.7-rc2 kernel
> > > > 2. Try suspend to disk (s2ram works OK)
> > > > 
> > > > System dies on message:
> > > > http://mrutecki.pl/download/kernel/3.7-rc2/swinka/DSCN0280.jpg
> > > > 
> > > > lspci:
> > > > http://mrutecki.pl/download/kernel/3.7-rc2/swinka/lspci.txt
> > > > 
> > > > dmesg:
> > > > http://mrutecki.pl/download/kernel/3.7-rc2/swinka/dmesg-3.7-rc2.txt
> > > 
> > > Still present in -rc3
> > 
> > This appears to be a memory allocation error and I have no idea what
> > the reason of it is.
> > 
> > Any chance to bisect?
> 
> 7f1290f2f2a4d2c3f1b7ce8e87256e052ca23125 is the first bad commit
> commit 7f1290f2f2a4d2c3f1b7ce8e87256e052ca23125
> Author: Jianguo Wu <wujianguo@...wei.com>
> Date:   Mon Oct 8 16:33:06 2012 -0700
> 
>     mm: fix-up zone present pages
> Signed-off-by: Jianguo Wu <wujianguo@...wei.com>
>     Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
>     Reported-by: Petr Tesarik <ptesarik@...e.cz>
>     Tested-by: Petr Tesarik <ptesarik@...e.cz>
>     Cc: "Luck, Tony" <tony.luck@...el.com>
>     Cc: Mel Gorman <mel@....ul.ie>
>     Cc: Yinghai Lu <yinghai@...nel.org>
>     Cc: Minchan Kim <minchan.kim@...il.com>
>     Cc: Johannes Weiner <hannes@...xchg.org>
>     Cc: David Rientjes <rientjes@...gle.com>
>     Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
>     Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
> 
> 
> Description says:
> "This patch intends to fix-up zone->present_pages when memory are freed to
>     buddy system on x86_64 and IA64 platforms."
> 
> but I use 32 bit kernel
> 
> Revert this commit solves problem.

This is good to know, thanks for bisecting it!

Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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