aboutsummaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorNeilBrown <neilb@suse.de>2012-07-03 11:46:53 +1000
committerNeilBrown <neilb@suse.de>2012-07-03 11:46:53 +1000
commit5cfb22a1f83e4f04c0a4df89b60053a077222e2b (patch)
tree9312c806fb3fb245beb0dd6669569f88a79a8b7d /drivers
parentfc448a18ae6219af9a73257b1fbcd009efab4a81 (diff)
downloadlinux-stericsson-5cfb22a1f83e4f04c0a4df89b60053a077222e2b.tar.gz
md/raid5: prefer replacing failed devices over want-replacement devices.
If a RAID5 has both a failed device and a device marked as 'WantReplacement', then we should preferentially replace the failed device. However the current code replaces whichever is found first. So split into 2 loops, check fail failed/missing first, and only check for WantReplacement if nothing is failed or missing. Reported-by: majianpeng <majianpeng@gmail.com> Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/raid5.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index d26767246d26..95fcbbf3d6c9 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5465,10 +5465,9 @@ static int raid5_add_disk(struct mddev *mddev, struct md_rdev *rdev)
if (rdev->saved_raid_disk >= 0 &&
rdev->saved_raid_disk >= first &&
conf->disks[rdev->saved_raid_disk].rdev == NULL)
- disk = rdev->saved_raid_disk;
- else
- disk = first;
- for ( ; disk <= last ; disk++) {
+ first = rdev->saved_raid_disk;
+
+ for (disk = first; disk <= last; disk++) {
p = conf->disks + disk;
if (p->rdev == NULL) {
clear_bit(In_sync, &rdev->flags);
@@ -5477,8 +5476,11 @@ static int raid5_add_disk(struct mddev *mddev, struct md_rdev *rdev)
if (rdev->saved_raid_disk != disk)
conf->fullsync = 1;
rcu_assign_pointer(p->rdev, rdev);
- break;
+ goto out;
}
+ }
+ for (disk = first; disk <= last; disk++) {
+ p = conf->disks + disk;
if (test_bit(WantReplacement, &p->rdev->flags) &&
p->replacement == NULL) {
clear_bit(In_sync, &rdev->flags);
@@ -5490,6 +5492,7 @@ static int raid5_add_disk(struct mddev *mddev, struct md_rdev *rdev)
break;
}
}
+out:
print_raid5_conf(conf);
return err;
}