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    [XFS] Block on unwritten extent conversion during synchronous direct I/O. · e927af90
    David Chinner 提交于
    Currently we do not wait on extent conversion to occur, and hence we can
    return to userspace from a synchronous direct I/O write without having
    completed all the actions in the write. Hence a read after the write may
    see zeroes (unwritten extent) rather than the data that was written.
    
    Block the I/O completion by triggering a synchronous workqueue flush to
    ensure that the conversion has occurred before we return to userspace.
    
    SGI-PV: 964092
    SGI-Modid: xfs-linux-melb:xfs-kern:28775a
    Signed-off-by: NDavid Chinner <dgc@sgi.com>
    Signed-off-by: NTim Shimmin <tes@sgi.com>
    e927af90
xfs_aops.c 38.3 KB