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由 Dmitry Monakhov 提交于
Inode's data or non journaled quota may be written w/o jounral so we _must_ send a barrier at the end of ext4_sync_fs. But it can be skipped if journal commit will do it for us. Also fix data integrity for nojournal mode. Signed-off-by: NDmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
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