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authorJonathan Brassow <jbrassow@redhat.com>2011-06-08 18:00:28 -0500
committerNeilBrown <neilb@suse.de>2011-06-09 11:42:29 +1000
commitd6b212f4b19da5301e6b6eca562e5c7a2a6e8c8d (patch)
tree0cf0ae9320ea9ebbb6bd1403659591cf399c16a1 /drivers/md
parent9c81075f436f867f580c2edf2350c0898cffc9d0 (diff)
MD: raid5 do not set fullsync
Add check to determine if a device needs full resync or if partial resync will do RAID 5 was assuming that if a device was not In_sync, it must undergo a full resync. We add a check to see if 'saved_raid_disk' is the same as 'raid_disk'. If it is, we can safely skip the full resync and rely on the bitmap for partial recovery instead. This is the legitimate purpose of 'saved_raid_disk', from md.h: int saved_raid_disk; /* role that device used to have in the * array and could again if we did a partial * resync from the bitmap */ Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/raid5.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 346e69bfdab3..f9d2fbc64977 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4858,7 +4858,7 @@ static raid5_conf_t *setup_conf(mddev_t *mddev)
printk(KERN_INFO "md/raid:%s: device %s operational as raid"
" disk %d\n",
mdname(mddev), bdevname(rdev->bdev, b), raid_disk);
- } else
+ } else if (rdev->saved_raid_disk != raid_disk)
/* Cannot rely on bitmap to complete recovery */
conf->fullsync = 1;
}