linux-kernel - Re: [problem] raid performance loss with 2.6.26-rc8 on 32-bit x86 (bisected)

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Message-ID: <486CD623.8030906@linux-foundation.org>
Date:	Thu, 03 Jul 2008 08:37:39 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Dan Williams <dan.j.williams@...el.com>
CC:	Mel Gorman <mel@....ul.ie>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andy Whitcroft <apw@...dowen.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, NeilBrown <neilb@...e.de>,
	babydr@...y-dragons.com, lee.schermerhorn@...com,
	a.beregalov@...il.com, akpm@...ux-foundation.org
Subject: Re: [problem] raid performance loss with 2.6.26-rc8 on 32-bit x86
 (bisected)

What a convoluted description. Simply put: We clobber the nr_zones field
because we write beyond the bounds of the node_zonelists[] array in
struct pglist_data.
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