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    SubjectRe: [patch] threading fix, tid-2.5.47-A3
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    On Mon, 2002-11-18 at 12:26, Ingo Molnar wrote:
    >
    > and we have VM_DONTCOPY already, which is used by the DRM code. So it
    > would only be a question of exporting this API to userspace. The attached
    > patch adds MAP_DONTCOPY. I made it unpriviledged, i doubt it has any
    > security impact.

    What is the behaviour of someone setting VM_DONTCOPY on memory that was
    copy on write between a large number of processes (say an executable
    image) ? Don't copy - but don't copy from what, from the original
    mapping or from the COW mapping of the original mapping ?

    Alan

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