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Date: Thu, 1 Dec 2011 11:29:04 +0100
From: Michal Hocko <mhocko@suse.cz>
Subject: [PATCH] mm: Ensure that pfn_valid is called once per pageblock when
 reserving pageblocks
Message-ID: <20111201102904.GA8809@tiehlicka.suse.cz>
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To: Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Andrea Arcangeli <aarcange@redhat.com>, David Rientjes <rientjes@google.com>, Dang Bo <bdang@vmware.com>, Arve =?iso-8859-1?B?SGr4bm5lduVn?= <arve@android.com>, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, John Stultz <john.stultz@linaro.org>, Dave Hansen <dave@linux.vnet.ibm.com>, linux-mm@kvack.org, linux-kernel@vger.kernel.org

Hi,
the patch bellow fixes a crash during boot (when we set up reserved
page blocks) if zone start_pfn is not block aligned. The issue has
been introduced in 3.0-rc1 by 6d3163ce: mm: check if any page in a
pageblock is reserved before marking it MIGRATE_RESERVE.

I think this is 3.2 and stable material.
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