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MD RAID1: Further conditionalize 'fullsync' 

A RAID1 device does not necessarily need a fullsync if the bitmap can be used instead.

Similar to commit d6b212f4b1 in raid5.c, if a raid1
device can be brought back (i.e. from a transient failure) it shouldn't need a
complete resync.  Provided the bitmap is not to old, it will have recorded the areas
of the disk that need recovery.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Jonathan Brassow 2012-05-22 13:55:31 +10:00 committed by NeilBrown
parent c32fb9e7ec
commit 4f0a5e012c
1 changed files with 2 additions and 1 deletions
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3
drivers/md/raid1.c
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@ -2600,7 +2600,8 @@ static struct r1conf *setup_conf(struct mddev *mddev)
if (!disk->rdev ||
!test_bit(In_sync, &disk->rdev->flags)) {
disk->head_position = 0;
if (disk->rdev)
if (disk->rdev &&
(disk->rdev->saved_raid_disk < 0))
conf->fullsync = 1;
} else if (conf->last_used < 0)
/*