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Josef Bacik
17c22e556f
I discovered a problem in btrfs where we'd end up pointing at a block we hadn't written out yet. This is triggered by a race when two different files on two different subvolumes fsync. This test exercises this path with dm-log-writes, and then replays the log at every FUA to verify the file system is still mountable and the log is replayable. This test is to verify the fix btrfs: fix incorrect updating of log root tree actually fixed the problem. Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>