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

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Date:	Tue, 30 Oct 2012 21:35:48 +0100
From:	Maciej Rutecki <maciej.rutecki@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>, wujianguo@...wei.com
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	jiang.liu@...wei.com, akpm@...ux-foundation.org
Subject: Re: [REGRESSION] 3.7-rc2 kernel BUG at kernel/power/snapshot.c:517!

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.


Regards

PS. Between Oct. 31-Nov. 4 I'm offline. 
-- 
Maciej Rutecki
http://www.mrutecki.pl
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