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daa79baefc
The option to enable unwritten extents was made default in 2003, removed from mkfs in 2007, and cannot be disabled in v5. We also rely on it for a lot of common functionality, so filesystems without it will run a completely untested and buggy code path. Enabling the support also is a simple bit flip using xfs_db, so legacy file systems can still be brought forward. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>