From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Date: Wed, 8 Sep 2010 01:19:36 +0000 (+0900)
Subject: HWPOISON, hugetlb: add free check to dequeue_hwpoison_huge_page()
X-Git-Tag: v2.6.37-rc1~109^2^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6de2b1aab94355482bd2accdc115666509667458;p=pandora-kernel.git

HWPOISON, hugetlb: add free check to dequeue_hwpoison_huge_page()

This check is necessary to avoid race between dequeue and allocation,
which can cause a free hugepage to be dequeued twice and get kernel unstable.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---

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