[dm-devel] [PATCH 12/17] bottom-layer barrier support
Mikulas Patocka
mpatocka at redhat.com
Mon Apr 20 08:01:11 UTC 2009
dm-delay-flush.patch
Flush supoprt for dm-delay target.
Signed-off-by: Mikulas Patocka <mpatocka at redhat.com>
---
drivers/md/dm-delay.c | 3 +++
1 file changed, 3 insertions(+)
Index: linux-2.6.30-rc1-devel/drivers/md/dm-delay.c
===================================================================
--- linux-2.6.30-rc1-devel.orig/drivers/md/dm-delay.c 2009-04-10 06:28:25.000000000 +0200
+++ linux-2.6.30-rc1-devel/drivers/md/dm-delay.c 2009-04-10 06:33:45.000000000 +0200
@@ -198,6 +198,7 @@ out:
mutex_init(&dc->timer_lock);
atomic_set(&dc->may_delay, 1);
+ ti->num_flush_requests = 1;
ti->private = dc;
return 0;
@@ -281,6 +282,8 @@ static int delay_map(struct dm_target *t
bio->bi_bdev = dc->dev_write->bdev;
bio->bi_sector = dc->start_write +
(bio->bi_sector - ti->begin);
+ if (!bio_sectors(bio))
+ bio->bi_sector = 0;
return delay_bio(dc, dc->write_delay, bio);
}
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