dm raid: avoid bitmap with raid4/5/6 journal device

With raid4/5/6, journal device and write intent bitmap are mutually exclusive.

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index c44925e..e1dd162 100644 (file)
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -2475,7 +2475,7 @@ static int super_validate(struct raid_set *rs, struct md_rdev *rdev)
        }
 
        /* Enable bitmap creation for RAID levels != 0 */
-       mddev->bitmap_info.offset = rt_is_raid0(rs->raid_type) ? 0 : to_sector(4096);
+       mddev->bitmap_info.offset = (rt_is_raid0(rs->raid_type) || rs->journal_dev.dev) ? 0 : to_sector(4096);
        mddev->bitmap_info.default_offset = mddev->bitmap_info.offset;
 
        if (!test_and_clear_bit(FirstUse, &rdev->flags)) {