tree 807d9cfcd1c2395cd1cf62a95ebd6676ee2a6a4d
parent 6140333d3656f62ac7e6a5af87e7fe92cfb8d655
author Mikulas Patocka <mpatocka@redhat.com> 1312284720 +0100
committer Alasdair G Kergon <agk@redhat.com> 1312284720 +0100

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>