diff options
| author | NeilBrown <neilb@suse.de> | 2006-01-06 11:20:13 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 19:34:02 +0300 |
| commit | 0a27ec96b6fb1abf867e36d7b0b681d67588767a (patch) | |
| tree | 4db5d9b8ef02b417fc2077d65311e2ea7cda5ce0 /include | |
| parent | 17999be4aa408e7ff3b9d32c735649676567a3cd (diff) | |
| download | linux-0a27ec96b6fb1abf867e36d7b0b681d67588767a.tar.xz | |
[PATCH] md: improve raid10 "IO Barrier" concept
raid10 needs to put up a barrier to new requests while it does resync or other
background recovery. The code for this is currently open-coded, slighty
obscure by its use of two waitqueues, and not documented.
This patch gathers all the related code into 4 functions, and includes a
comment which (hopefully) explains what is happening.
Signed-off-by: Neil Brown <neilb@suse.de>
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/raid10.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/raid/raid10.h b/include/linux/raid/raid10.h index 60708789c8f9..08317b77802b 100644 --- a/include/linux/raid/raid10.h +++ b/include/linux/raid/raid10.h @@ -39,11 +39,11 @@ struct r10_private_data_s { spinlock_t resync_lock; int nr_pending; + int nr_waiting; int barrier; sector_t next_resync; - wait_queue_head_t wait_idle; - wait_queue_head_t wait_resume; + wait_queue_head_t wait_barrier; mempool_t *r10bio_pool; mempool_t *r10buf_pool; |