From e45beaf693e4d0923a28569f995dbacbf915265d Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Tue, 2 Aug 2011 12:32:00 +0100 Subject: dm snapshot: flush disk cache when merging commit 762a80d9fc9f690a3a35983f3b4619a220650808 upstream. 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. Signed-off-by: Mikulas Patocka Signed-off-by: Alasdair G Kergon Signed-off-by: Greg Kroah-Hartman Change-Id: Iea48c7db57774e0e0b841a42c67ddd7e1f2fad62 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/35678 Tested-by: Per VAHLNE Reviewed-by: Jonas ABERG --- drivers/md/dm-snap-persistent.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c index 135c2f1fdbf..e4ecadf0548 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; -- cgit v1.2.3