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    SubjectRe: fcntl(2) and other file systems like XFS
    Hi,

    On Tue, Mar 21, 2000 at 02:25:34PM -0500, Jeff Garzik wrote:
    > > permitted on O_NONE file handles.
    >
    > On a similar subject, how feasible is it to implement O_DIRECT?

    For block devices, it is easy --- I've already done it (it was part of
    a previous raw IO patch which never made it into the mainstream). For
    regular files, it will be part of the 2.5 kiobuf infrastructure: I've
    already been talking with Ingo about how to do it so that it plays
    cleanly with the page cache.

    --Stephen

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