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    SubjectRe: differences between MADV_FREE and MADV_DONTNEED
    On Mon, Jan 16, 2006 at 09:03:00AM -0800, Suleiman Souhlal wrote:
    > Andrea Arcangeli wrote:
    >
    > >We can also use it for the same purpose, we could add the pages to
    > >swapcache mark them dirty and zap the ptes _after_ that.
    >
    > Wouldn't that cause the pages to get swapped out immediately?

    Not really, it would be a non blocking operation. But they could be
    swapped out shortly later (that's the whole point of DONTNEED, right?),
    once there is more memory pressure. Otherwise if they're used again, a
    minor fault will happen and it will find the swapcache uptodate in ram.
    -
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