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authorJens Axboe <axboe@kernel.dk>2018-10-10 20:49:26 -0600
committerMike Snitzer <snitzer@redhat.com>2018-10-11 11:36:09 -0400
commit6a23e05c2fe3c64ec012fd81e51e3ab51e4f2f9f (patch)
tree43687a888b009ec49092138e6d691503669b4dc1 /drivers/md/dm-mpath.c
parent118aa47c7072bce05fc39bd40a1c0a90caed72ab (diff)
downloadlinux-6a23e05c2fe3c64ec012fd81e51e3ab51e4f2f9f.tar.gz
dm: remove legacy request-based IO path
dm supports both, and since we're killing off the legacy path in
general, get rid of it in dm.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-mpath.c')
-rw-r--r--drivers/md/dm-mpath.c14
1 files changed, 2 insertions, 12 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 419362c2d8ac..a24ed3973e7c 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -203,14 +203,7 @@ static struct multipath *alloc_multipath(struct dm_target *ti)
 static int alloc_multipath_stage2(struct dm_target *ti, struct multipath *m)
 {
 	if (m->queue_mode == DM_TYPE_NONE) {
-		/*
-		 * Default to request-based.
-		 */
-		if (dm_use_blk_mq(dm_table_get_md(ti->table)))
-			m->queue_mode = DM_TYPE_MQ_REQUEST_BASED;
-		else
-			m->queue_mode = DM_TYPE_REQUEST_BASED;
-
+		m->queue_mode = DM_TYPE_MQ_REQUEST_BASED;
 	} else if (m->queue_mode == DM_TYPE_BIO_BASED) {
 		INIT_WORK(&m->process_queued_bios, process_queued_bios);
 		/*
@@ -537,10 +530,7 @@ static int multipath_clone_and_map(struct dm_target *ti, struct request *rq,
 		 * get the queue busy feedback (via BLK_STS_RESOURCE),
 		 * otherwise I/O merging can suffer.
 		 */
-		if (q->mq_ops)
-			return DM_MAPIO_REQUEUE;
-		else
-			return DM_MAPIO_DELAY_REQUEUE;
+		return DM_MAPIO_REQUEUE;
 	}
 	clone->bio = clone->biotail = NULL;
 	clone->rq_disk = bdev->bd_disk;