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Brian Foster
fae1d350f9
XFS has historically had a stale data exposure window if a crash occurs after a delalloc->physical extent conversion but before writeback completes to the associated extent. While this should be a rare occurrence in production environments due to typical writeback ordering and such, it is not guaranteed in all cases until data extents are initialized as unwritten (or otherwise zeroed) before they are written. Add a test that performs selective writeback ordering to reproduce stale data exposure after a crash. Note that this test currently fails on XFS. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>