linux-kernel - Re: [PATCH] mm: __count_immobile_pages make sure the node is online

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Date:	Thu, 12 Jan 2012 11:14:15 +0000
From:	Mel Gorman <mgorman@...e.de>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	David Rientjes <rientjes@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [PATCH] mm: __count_immobile_pages make sure the node is online

On Thu, Jan 12, 2012 at 11:05:21AM +0100, Michal Hocko wrote:
> From 39de8df13532150fc4518dad0cb3f6fd88745b8a Mon Sep 17 00:00:00 2001
> From: Michal Hocko <mhocko@...e.cz>
> Date: Thu, 12 Jan 2012 10:19:04 +0100
> Subject: [PATCH] mm: __count_immobile_pages make sure the node is online
> 
> page_zone requires to have an online node otherwise we are accessing
> NULL NODE_DATA. This is not an issue at the moment because node_zones
> are located at the structure beginning but this might change in the
> future so better be careful about that.
> 
> Signed-off-by: Michal Hocko <mhocko@...e.cz>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

Acked-by: Mel Gorman <mgorman@...e.de>

Be aware that this is not the version picked up by Andrew. It would
not hurt to resend as V2 with a changelog and a note saying it replaces
mm-fix-null-ptr-dereference-in-__count_immobile_pages.patch in mmotm.
This is just in case the wrong one gets merged due to this thread
getting lost in the noise of Andrew's inbox.

-- 
Mel Gorman
SUSE Labs
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