From 918f02383fb9ff5dba29709f3199189eeac55021 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Wed, 22 Aug 2007 14:01:52 -0700 Subject: [PATCH] md: make sure a re-add after a restart honours bitmap when resyncing Commit 1757128438d41670ded8bc3bc735325cc07dc8f9 was slightly bad. If an array has a write-intent bitmap, and you remove a drive, then readd it, only the changed parts should be resynced. However after the above commit, this only works if the array has not been shut down and restarted. This is because it sets 'fullsync' at little more often than it should. This patch is more careful. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/raid1.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 650991bddd8..ea2a58d2887 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1972,7 +1972,8 @@ static int run(mddev_t *mddev) !test_bit(In_sync, &disk->rdev->flags)) { disk->head_position = 0; mddev->degraded++; - conf->fullsync = 1; + if (disk->rdev) + conf->fullsync = 1; } } if (mddev->degraded == conf->raid_disks) { -- 2.20.1