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authorMartin Wilck <mwilck@arcor.de>2013-04-24 11:42:42 +1000
committerNeilBrown <neilb@suse.de>2013-04-24 11:42:42 +1000
commit7e83ccbecd608b971f340e951c9e84cd0343002f (patch)
treeeccd87d8d0f04cbc3aa95c18c50b05aafc1d032c /drivers/md/raid10.c
parentb6fec069af5a26439f7d36cb3d4f5dd1378af7e2 (diff)
downloadblackbird-op-linux-7e83ccbecd608b971f340e951c9e84cd0343002f.tar.gz
blackbird-op-linux-7e83ccbecd608b971f340e951c9e84cd0343002f.zip
md/raid10: Allow skipping recovery when clean arrays are assembled
When an array is assembled incrementally with mdadm -I -R and the array switches to "active" mode, md starts a recovery. If the array was clean, the "fullsync" flag will be 0. Skip the full recovery in this case, as RAID1 does (the code was actually copied from the sync_request() method of RAID1). Signed-off-by: Martin Wilck <mwilck@arcor.de> Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid10.c')
-rw-r--r--drivers/md/raid10.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 77b562d18a90..2372926dc559 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2913,6 +2913,22 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr,
if (init_resync(conf))
return 0;
+ /*
+ * Allow skipping a full rebuild for incremental assembly
+ * of a clean array, like RAID1 does.
+ */
+ if (mddev->bitmap == NULL &&
+ mddev->recovery_cp == MaxSector &&
+ !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) &&
+ conf->fullsync == 0) {
+ *skipped = 1;
+ max_sector = mddev->dev_sectors;
+ if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ||
+ test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery))
+ max_sector = mddev->resync_max_sectors;
+ return max_sector - sector_nr;
+ }
+
skipped:
max_sector = mddev->dev_sectors;
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ||
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