From 6ee0bae9c847086b7025494e84a2fff0dfc83bdc Mon Sep 17 00:00:00 2001 From: Heinz Mauelshagen <heinzm@redhat.com> Date: Wed, 15 Jun 2016 22:29:09 +0200 Subject: [PATCH] dm raid: enhance comments in takeover checks Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> --- drivers/md/dm-raid.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 864e903cddda..cc6eb7c27a7d 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -1610,7 +1610,7 @@ static int rs_check_takeover(struct raid_set *rs) mddev->raid_disks == 2) return 0; - /* raid5 with parity N -> raid6 with parity N */ + /* raid5_* -> raid6_*_6 with Q-Syndrome N (e.g. raid5_ra -> raid6_ra_6 */ if (mddev->new_level == 6 && ((mddev->layout == ALGORITHM_PARITY_N && mddev->new_layout == ALGORITHM_PARITY_N) || __within_range(mddev->new_layout, ALGORITHM_LEFT_ASYMMETRIC_6, ALGORITHM_RIGHT_SYMMETRIC_6))) @@ -1628,7 +1628,7 @@ static int rs_check_takeover(struct raid_set *rs) mddev->layout == ALGORITHM_PARITY_N) return 0; - /* raid6_*_n with parity N -> raid5_* */ + /* raid6_*_n with Q-Syndrome N -> raid5_* */ if (mddev->new_level == 5 && ((mddev->layout == ALGORITHM_PARITY_N && mddev->new_layout == ALGORITHM_PARITY_N) || __within_range(mddev->new_layout, ALGORITHM_LEFT_ASYMMETRIC, ALGORITHM_RIGHT_SYMMETRIC))) -- GitLab