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7c0b493bf6
Ensure that we can create a file with a single extent, reflink two blocks out of the middle of that extent, and the resulting fiemap reports two shared extents, instead of lazily reporting the entire huge extent as shared. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>