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    SubjectRe: [PATCH -mm] vmscan: make mapped executable pages the first class citizen
    On Thu, 7 May 2009, Peter Zijlstra wrote:

    > It re-instates the young bit for PROT_EXEC pages, so that they will only
    > be paged when they are really cold, or there is severe pressure.

    But they are rescanned until then. Really cold means what exactly? I do a
    back up of a few hundred gigabytes and do not use firefox while the backup
    is ongoing. Will the firefox pages still be in memory or not?

    > This simply gives them an edge over regular data. I don't think the
    > extra scanning is a problem, since you rarely have huge amounts of
    > executable pages around.
    > mlock()'ing all code just doesn't sound like a good alternative.

    Another possibility may be to put the exec pages on the mlock list
    and scan the list if under extreme duress?

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      Last update: 2009-05-07 16:33    [W:0.022 / U:4.040 seconds]
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