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    SubjectRe: [PATCH][RFC] fix kernel BUG at mm/migrate.c:719! in 2.6.26-rc5-mm3
    On Tue, 17 Jun 2008, Lee Schermerhorn wrote:
    >
    > Now I wonder if the assertion that newpage count == 1 could be violated?
    > I don't see how. We've just allocated and filled it and haven't
    > unlocked it yet, so we should hold the only reference. Do you agree?

    Disagree: IIRC, excellent example of the kind of assumption
    that becomes invalid with Nick's speculative page references.

    Someone interested in the previous use of the page may have
    incremented the refcount, and in due course will find that
    it's got reused for something else, and will then back off.

    Hugh


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