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| author | Mikulas Patocka <mpatocka@redhat.com> | 2011-08-02 12:32:00 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2011-08-02 12:32:00 +0100 |
| commit | 762a80d9fc9f690a3a35983f3b4619a220650808 (patch) | |
| tree | 807d9cfcd1c2395cd1cf62a95ebd6676ee2a6a4d /drivers/md/dm-snap-persistent.c | |
| parent | 6140333d3656f62ac7e6a5af87e7fe92cfb8d655 (diff) | |
| download | lwn-762a80d9fc9f690a3a35983f3b4619a220650808.tar.gz lwn-762a80d9fc9f690a3a35983f3b4619a220650808.zip | |
dm snapshot: flush disk cache when merging
This patch makes dm-snapshot flush disk cache when writing metadata for
merging snapshot.
Without cache flushing the disk may reorder metadata write and other
data writes and there is a possibility of data corruption in case of
power fault.
Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-snap-persistent.c')
| -rw-r--r-- | drivers/md/dm-snap-persistent.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c index 135c2f1fdbfc..e4ecadf0548a 100644 --- a/drivers/md/dm-snap-persistent.c +++ b/drivers/md/dm-snap-persistent.c @@ -753,7 +753,7 @@ static int persistent_commit_merge(struct dm_exception_store *store, for (i = 0; i < nr_merged; i++) clear_exception(ps, ps->current_committed - 1 - i); - r = area_io(ps, WRITE); + r = area_io(ps, WRITE_FLUSH_FUA); if (r < 0) return r; |