From 1eb34652551146be64def511d34a02178d9b00cd Mon Sep 17 00:00:00 2001 From: Arne Redlich Date: Tue, 31 Jul 2007 00:37:57 -0700 Subject: md: handle writes to broken raid10 arrays gracefully 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 Acked-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- drivers/md/raid10.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/md') diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 9eb66c1b523b..fb5d9c6e9de0 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -917,6 +917,13 @@ static int make_request(request_queue_t *q, struct bio * bio) 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); -- cgit v1.2.3