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    SubjectRe: [rfc] lockless pagecache
    Nick Piggin wrote:

    > However I think for Oracle and others that use shared memory like
    > this, they are probably not doing linear access, so that would be a
    > net loss. I'm not completely sure (I don't have access to real loads
    > at the moment), but I would have thought those guys would have looked
    > into fault ahead if it were a possibility.

    i thought those guys used O_DIRECT - in which case, wouldn't the page
    cache not be used?


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