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    SubjectRe: [PATCH/RFC] pass dio_complete proper offset from finished_one_bio
    Eric Sandeen wrote:
    > We saw problems w/ xfs doing AIO+DIO into a sparse file.
    > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=217098
    >
    > It seemed that xfs was doing "extent conversion" at the wrong offsets, so
    > written regions came up as unwritten (zeros) and stale data was exposed
    > in the region after the write. Thanks to Peter Backes for the very
    > nice testcase.
    >
    > This also broke xen with blktap over xfs.

    Hrmph. Zach's changes in -mm magically made this go away... I was about
    to submit a proper patch against -mm but it seem to be not needed.

    So, now digging around to see why that is, and what exactly "fixed" things.

    -Eric

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