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    SubjectRe: [RFC] Track mlock()ed pages
    Christoph Lameter wrote:
    > Add NR_MLOCK
    >
    > Track mlocked pages via a ZVC

    I think it is not quite right. You are tracking the number of ptes
    that point to mlocked pages, which can be >= the actual number of pages.

    Also, page_add_anon_rmap still needs to be balanced with page_remove_rmap.

    I can't think of an easy way to do this without per-page state. ie.
    another page flag.

    >
    > Signed-off-by: Christoph Lameter <clameter@sgi.com>
    >

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