linux-kernel - Re: [BUG] 2.6.26-rc5-mm2 - kernel BUG at arch/x86/kernel/setup.c:388!

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Message-ID: <4850C861.108@linux.vnet.ibm.com>
Date:	Thu, 12 Jun 2008 12:25:29 +0530
From:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
To:	Vegard Nossum <vegard.nossum@...il.com>
CC:	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org,
	linux-mm@...ck.org, Andy Whitcroft <apw@...dowen.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Mike Travis <travis@....com>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [BUG] 2.6.26-rc5-mm2 - kernel BUG at arch/x86/kernel/setup.c:388!

Vegard Nossum wrote:
> On 6/11/08, Dave Hansen <dave@...ux.vnet.ibm.com> wrote:
>> On Wed, 2008-06-11 at 23:26 +0530, Kamalesh Babulal wrote:
>>  > Hi Andrew,
>>  >
>>  > The 2.6.26-rc5-mm2 kernel panic's, while booting up on the x86_64
>>  > box with the attached .config file.
>>
>>
>> Just to save everyone the trouble, it looks like this is a new BUG_ON().
>>  
>>  http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.26-rc5/2.6.26-rc5-mm2/broken-out/fix-x86_64-splat.patch
>>
>>  The machine in question is a single-node machine, but with
>>  CONFIG_NUMA=y.
>>
> 
> Yes. Sorry, I already responded in a separate e-mail (see below), but
> that obviously missed all the Ccs. So here it goes again...:
> 
> I'm betting
> 
> commit a953e4597abd51b74c99e0e3b7074532a60fd031
> Author: Mike Travis <travis@....com>
> Date:   Mon May 12 21:21:12 2008 +0200
> 
>     sched: replace MAX_NUMNODES with nr_node_ids in kernel/sched.c
> 
> will fix this if it's not in -mm2 already.
> 
> The BUG() is simply there to prevent silent corruption. Mike already
> has a patch that changes it to a WARN(), but it obviously didn't get
> through (either)...
> 
> 
> Vegard
Hi,

Thanks, the patch fixes the kernel oops.

> 
> 
> On 6/11/08, Vegard Nossum <vegard.nossum@...il.com> wrote:
>> On 6/9/08, Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com> wrote:
>>  > Hi Andrew,
>>  >
>>  > The 2.6.26-rc5-mm2 kernel panic's, while booting up on the x86_64
>>  > box with the attached .config file.
>>
>>  (Please apologize for the strange way of replying to this message. It
>>  seems that LKML gave up delivering to my address, so I'm currently
>>  reading off lkml.org.)
>>
>>  This should already be fixed, but Andrew refused to apply the patch
>>  before releasing the -mm1 (and -mm2 apparently). I'm attaching the
>>  patch, can you see if it helps?
>>
>>  Thanks.
>>
>>
>>  Vegard
> 


-- 
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
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