linux-kernel - Re: [BUG] regression from 2.6.24-rc8-mm1 and 2.6.24-mm1 kernel panic while bootup

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Date:	Tue, 05 Feb 2008 18:00:25 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>, mingo@...e.hu,
	tglx@...utronix.de, apw@...dowen.org, randy.dunlap@...cle.com,
	linux-mm@...ck.org
Subject: Re: [BUG] regression from 2.6.24-rc8-mm1 and 2.6.24-mm1 kernel panic
 while bootup

Andrew Morton wrote:
> On Tue, 05 Feb 2008 13:48:17 +0530 Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com> wrote:
>
[snip]

> argh, I'd forgotten about that.  You bisected it down to a clearly-innocent
> patch and none of the mm developers appeared interested.
> 
> Oh well, it'll probably be in mainline tomorrow.  That should get it
> fixed.

We've tracked this down to a problem where the nodeid might be invalid. Kamalesh
is investigating problem. We suspect we are doing a kmalloc_node with an invalid
nodeid.

We see

cpu with no node 2, num_online_nodes 1
cpu with no node 3, num_online_nodes 1

in the bootlog. Kamalesh verified that the problem exists with both slub and slab.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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