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    SubjectRe: True fsync() in Linux (on IDE)
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    On Fri, 2004-03-19 at 14:36, Hans Reiser wrote:

    > I hope I am totally off-base and not understanding you.... Please help
    > me here.

    Lets look at actual scope of the problem:

    filesystem metadata
    filesystem data (fsync, O_SYNC, O_DIRECT)
    block device data (fsync, O_SYNC, O_DIRECT)

    Multiply the cases above times each filesystem and also times md and
    device mapper, since the barriers need to aggregate down to all the
    drives.

    In other words, just fixing fsync in 2.4 is not enough, and there is
    still considerable development needed in 2.6. Maybe after all the 2.6
    changes are done and accepted we can consider backporting parts of it to
    2.4.

    -chris


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