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    SubjectRe: [PATCH] Fix bad data from non-direct-io read after direct-io write


    On Fri, 26 Oct 2007, Zach Brown wrote:
    >
    > I can throw together a patch if you haven't already committed one by the
    > time you read this ;).

    I'm not touching that code except to send out possible patches for others
    to test and comment on. I have no test-cases, nor any real interest in it.
    So yeah, please send me a tested and thought-through patch.

    It sounded like Karl actually had a test-case to trigger this, but maybe
    I'm confused (and it sounds a bit unlikely, since it should be hard to
    trigger.. Although maybe you can trigger it by doing a direct_IO write
    with the *source* being an mmap() of the file you're writing to, and
    depending on the write itself re-populating the destination in the page
    cache?)

    Karl?

    Linus
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