linux-kernel - Re: 2.6.24-rc3-mm1 - Kernel Panic on IO-APIC

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Message-ID: <Pine.LNX.4.64.0711261254560.25688@schroedinger.engr.sgi.com>
Date:	Mon, 26 Nov 2007 12:56:08 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Rik van Riel <riel@...hat.com>, kamalesh@...ux.vnet.ibm.com,
	linux-kernel@...r.kernel.org, apw@...dowen.org,
	balbir@...ux.vnet.ibm.com, linux-acpi@...r.kernel.org,
	tglx@...utronix.de, mingo@...e.hu
Subject: Re: 2.6.24-rc3-mm1 - Kernel Panic on IO-APIC

On Mon, 26 Nov 2007, Andrew Morton wrote:

> hm.  This smells like a startup ordering problem, but everything which
> refresh_zone_stat_thresholds() should be set up by the time we run
> initcalls.  Maybe the zone lists are bad?

refresh_zone_stat_thresholds goes through each zone and updates
the stat threshold for every per cpu structure in each zone.

So this could be a processor marked online where the pcp structures have 
not been allocated or a zone NULL pointer.

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