rbd: enable multiple blk-mq queues

Allocate one queue per CPU and get a performance boost from higher parallelism. Signed-off-by: Hannes Reinecke <[email protected]> Reviewed-by: Ilya Dryomov <[email protected]> Signed-off-by: Ilya Dryomov <[email protected]>
torvalds · Mar 30, 2020 · f9b6b98 · f9b6b98
1 parent 59e542c
commit f9b6b98
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
@@ -4970,7 +4970,7 @@ 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);