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Date: Fri, 27 Jul 2007 16:44:35 +0200 From: Arne Redlich <agr@...erkom-dd.de> To: Neil Brown <neilb@...e.de> Cc: linux-raid <linux-raid@...r.kernel.org>, lkml <linux-kernel@...r.kernel.org> Subject: [PATCH] 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 <agr@...erkom-dd.de> diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index ea1b3e3..957932e 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -917,6 +917,13 @@ static int make_request(struct request_queue *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); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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