libext2fs: automatically enable meta_bg to avoid filling up BG 0

If during formatting we'd lose more than 75% a block group to group
descriptors and other metadata, enable the meta_bg feature.  This
enables us to create >500T filesystems with default options.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
1 file changed