tree 630a88dd5afe2c49a428179770140b22bbc9d7da
parent 290408d4a25002f099efeee7b6a5778d431154d6
author Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> 1283908776 +0900
committer Andi Kleen <ak@linux.intel.com> 1286523165 +0200

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>