linux-kernel - Re: [BUG] __GFP_THISNODE is not always honored

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Message-ID: <20080818195743.GB22601@csn.ul.ie>
Date:	Mon, 18 Aug 2008 20:57:43 +0100
From:	Mel Gorman <mel@....ul.ie>
To:	Adam Litke <agl@...ibm.com>
Cc:	linux-mm <linux-mm@...ck.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	nacc <nacc@...ux.vnet.ibm.com>, apw <apw@...dowen.org>,
	agl <agl@...ux.vnet.ibm.com>
Subject: Re: [BUG] __GFP_THISNODE is not always honored

On (18/08/08 13:16), Adam Litke didst pronounce:
> <MUCH SNIPPAGE>
> mminit::memmap_init Initialising map node 0 zone 0 pfns 32768 -> 278528
> mminit::memmap_init Initialising map node 1 zone 0 pfns 0 -> 524288

This might be the problem here. This machine has overlapping nodes which
is a fairly rare situation. I think it's possible the page linkages for
node 0 are getting overwritten with their node 1 equivalents. If this is
happening, it would lead to some oddness.

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