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    SubjectRe: [PATCH 2/2] mlock: do not munlock pages in __do_fault()
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    On Mon, Feb 7, 2011 at 4:47 PM, Michel Lespinasse <walken@google.com> wrote:
    > If the page is going to be written to, __do_page needs to break COW.
    > However, the old page (before breaking COW) was never mapped mapped into
    > the current pte (__do_fault is only called when the pte is not present),
    > so vmscan can't have marked the old page as PageMlocked due to being
    > mapped in __do_fault's VMA. Therefore, __do_fault() does not need to worry
    > about clearing PageMlocked() on the old page.
    >
    > Signed-off-by: Michel Lespinasse <walken@google.com>

    Acked-by: Hugh Dickins <hughd@google.com>


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