From: Arne Redlich <agr@powerkom-dd.de>
To: Neil Brown <neilb@suse.de>
Cc: linux-raid <linux-raid@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: [PATCH] md: handle writes to broken raid10 arrays gracefully
Date: Fri, 27 Jul 2007 16:44:35 +0200 [thread overview]
Message-ID: <1185547475.25852.5.camel@confield.dd.xiranet.com> (raw)
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@powerkom-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);
reply other threads:[~2007-07-27 15:15 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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