[15/15] rbd: switch to blk-mq
diff mbox series

Message ID 20200131103739.136098-16-hare@suse.de
State New
Headers show
Series
  • rbd: switch to blk-mq
Related show

Commit Message

Hannes Reinecke Jan. 31, 2020, 10:37 a.m. UTC
Allocate one queue per CPU and get a performance boost from
higher parallelism.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/block/rbd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Christoph Hellwig Feb. 3, 2020, 8:36 a.m. UTC | #1
On Fri, Jan 31, 2020 at 11:37:39AM +0100, Hannes Reinecke wrote:
> Allocate one queue per CPU and get a performance boost from
> higher parallelism.

Well, the driver already is using blk-mq so your subject is incorrect.
I think you want to say something like "rbd: support multiple queues"

Patch
diff mbox series

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index cc3e5116fe58..dc3b44177fea 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -5094,7 +5094,7 @@  static int rbd_init_disk(struct rbd_device *rbd_dev)
 	rbd_dev->tag_set.queue_depth = rbd_dev->opts->queue_depth;
 	rbd_dev->tag_set.numa_node = NUMA_NO_NODE;
 	rbd_dev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
-	rbd_dev->tag_set.nr_hw_queues = 1;
+	rbd_dev->tag_set.nr_hw_queues = num_present_cpus();
 	rbd_dev->tag_set.cmd_size = sizeof(struct rbd_img_request);
 
 	err = blk_mq_alloc_tag_set(&rbd_dev->tag_set);