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    SubjectRe: [PATCH] hugetlb: avoid gratuitous BUG_ON in hugetlb_fault() -> hugetlb_cow()
    On Sun, Apr 29, 2012 at 03:04:51PM -0400, Chris Metcalf wrote:
    > Commit 66aebce747eaf added code to avoid a race condition by
    > elevating the page refcount in hugetlb_fault() while calling
    > hugetlb_cow(). However, one code path in hugetlb_cow() includes
    > an assertion that the page count is 1, whereas it may now also
    > have the value 2 in this path. Consensus is that this BUG_ON
    > has served its purpose, so rather than extending it to cover both
    > cases, we just remove it.
    > Signed-off-by: Chris Metcalf <>

    Acked-by: Mel Gorman <>

    Mel Gorman
    SUSE Labs

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