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authorNeilBrown <neilb@suse.de>2006-01-06 00:20:19 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:34:03 -0800
commitddaf22abaa831763e75775e6d4c7693504237997 (patch)
tree4f6ba4cb056f8c7cea82c7d548769b879d0fb405 /include/linux/raid/raid1.h
parent[PATCH] md: improve handing of read errors with raid6 (diff)
downloadlinux-dev-ddaf22abaa831763e75775e6d4c7693504237997.tar.xz
linux-dev-ddaf22abaa831763e75775e6d4c7693504237997.zip
[PATCH] md: attempt to auto-correct read errors in raid1
On a read-error we suspend the array, then synchronously read the block from other arrays until we find one where we can read it. Then we try writing the good data back everywhere and make sure it works. If any write or subsequent read fails, only then do we fail the device out of the array. To be able to suspend the array, we need to also keep track of how many requests are queued for handling by raid1d. 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/linux/raid/raid1.h')
-rw-r--r--include/linux/raid/raid1.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/raid/raid1.h b/include/linux/raid/raid1.h
index c55674252533..cbe4238d3f9f 100644
--- a/include/linux/raid/raid1.h
+++ b/include/linux/raid/raid1.h
@@ -46,6 +46,7 @@ struct r1_private_data_s {
spinlock_t resync_lock;
int nr_pending;
int nr_waiting;
+ int nr_queued;
int barrier;
sector_t next_resync;
int fullsync; /* set to 1 if a full sync is needed,
@@ -57,6 +58,8 @@ struct r1_private_data_s {
struct pool_info *poolinfo;
+ struct page *tmppage;
+
mempool_t *r1bio_pool;
mempool_t *r1buf_pool;
};