redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

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>
hifive-unleashed-5.1
Mikulas Patocka 2011-08-02 12:32:00 +01:00 committed by Alasdair G Kergon
parent 6140333d36
commit 762a80d9fc
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/md/dm-snap-persistent.c
View File

@ -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;