The patch titled
md: handle writes to broken raid10 arrays gracefully
has been added to the -mm tree. Its filename is
md-handle-writes-to-broken-raid10-arrays-gracefully.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: md: handle writes to broken raid10 arrays gracefully
From: Arne Redlich <agr@xxxxxxxxxxxxxx>
When writing to a broken array, raid10 currently happily emits empty bio
lists. IOW, the master bio will never be completed, sending writers to
UNINTERRUPTIBLE_SLEEP forever.
Signed-off-by: Arne Redlich <agr@xxxxxxxxxxxxxx>
Cc: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/md/raid10.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN drivers/md/raid10.c~md-handle-writes-to-broken-raid10-arrays-gracefully drivers/md/raid10.c
--- a/drivers/md/raid10.c~md-handle-writes-to-broken-raid10-arrays-gracefully
+++ a/drivers/md/raid10.c
@@ -887,6 +887,13 @@ static int make_request(struct request_q
bio_list_add(&bl, mbio);
}
+ if (unlikely(!atomic_read(&r10_bio->remaining))) {
+ /* the array is dead */
+ md_write_end(mddev);
+ raid_end_bio_io(r10_bio);
+ return 0;
+ }
+
bitmap_startwrite(mddev->bitmap, bio->bi_sector, r10_bio->sectors, 0);
spin_lock_irqsave(&conf->device_lock, flags);
bio_list_merge(&conf->pending_bio_list, &bl);
_
Patches currently in -mm which might be from agr@xxxxxxxxxxxxxx are
md-handle-writes-to-broken-raid10-arrays-gracefully.patch
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