HWPOISON, hugetlb: add free check to dequeue_hwpoison_huge_page()

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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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Naoya Horiguchi 2010-09-08 10:19:36 +09:00 • committed by Andi Kleen

parent 290408d4a2

commit 6de2b1aab9

3 changed files with 31 additions and 8 deletions

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4

include/linux/hugetlb.h

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29

mm/hugetlb.c

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6

mm/memory-failure.c

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