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| author | NeilBrown <neilb@cse.unsw.edu.au> | 2005-06-21 17:17:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-21 19:07:46 -0700 |
| commit | 41158c7eb22312cfaa256744e1553bb4042ff085 (patch) | |
| tree | 21c28e0630d66fc32d758993299a78088a846562 /include | |
| parent | 289e99e8ed8f36e386bf7de49947311c17ae1482 (diff) | |
| download | op-kernel-dev-41158c7eb22312cfaa256744e1553bb4042ff085.zip op-kernel-dev-41158c7eb22312cfaa256744e1553bb4042ff085.tar.gz | |
[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 'include')
| -rw-r--r-- | include/linux/raid/md_k.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h index 16e94a9..6cdcb44 100644 --- a/include/linux/raid/md_k.h +++ b/include/linux/raid/md_k.h @@ -183,6 +183,10 @@ struct mdk_rdev_s int desc_nr; /* descriptor index in the superblock */ int raid_disk; /* role of device in array */ + 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 + */ atomic_t nr_pending; /* number of pending requests. * only maintained for arrays that |
