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| author | NeilBrown | 2005-06-22 02:17:25 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2005-06-22 04:07:46 +0200 |
| commit | 41158c7eb22312cfaa256744e1553bb4042ff085 (patch) | |
| tree | 21c28e0630d66fc32d758993299a78088a846562 /drivers/md/raid1.c | |
| parent | [PATCH] md: initialise sync_blocks in raid1 resync (diff) | |
| download | kernel-qcow2-linux-41158c7eb22312cfaa256744e1553bb4042ff085.tar.gz kernel-qcow2-linux-41158c7eb22312cfaa256744e1553bb4042ff085.tar.xz kernel-qcow2-linux-41158c7eb22312cfaa256744e1553bb4042ff085.zip | |
[PATCH] md: optimise reconstruction when re-adding a recently failed drive.
When an array is degraded, bit in the intent-bitmap are never cleared. So if
a recently failed drive is re-added, we only need to reconstruct the block
that are still reflected in the bitmap.
This patch adds support for this re-adding.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index c3b4772cfaea..3f5234fe3593 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -811,9 +811,12 @@ static int raid1_add_disk(mddev_t *mddev, mdk_rdev_t *rdev) { conf_t *conf = mddev->private; int found = 0; - int mirror; + int mirror = 0; mirror_info_t *p; + if (rdev->saved_raid_disk >= 0 && + conf->mirrors[rdev->saved_raid_disk].rdev == NULL) + mirror = rdev->saved_raid_disk; for (mirror=0; mirror < mddev->raid_disks; mirror++) if ( !(p=conf->mirrors+mirror)->rdev) { @@ -830,6 +833,8 @@ static int raid1_add_disk(mddev_t *mddev, mdk_rdev_t *rdev) p->head_position = 0; rdev->raid_disk = mirror; found = 1; + if (rdev->saved_raid_disk != mirror) + conf->fullsync = 1; p->rdev = rdev; break; } |