From: Hannes Reinecke <hare@suse.de>
Date: Fri, 31 Jan 2020 10:37:39 +0000 (+0100)
Subject: rbd: enable multiple blk-mq queues
X-Git-Tag: v5.7-rc1~39^2~35
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f9b6b98d24f7cec5b8269217f9d4fdec1ca43218;p=thirdparty%2Fkernel%2Flinux.git

rbd: enable multiple blk-mq queues

Allocate one queue per CPU and get a performance boost from
higher parallelism.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 3af09a0f208b0..1e0a6b19ae0dd 100644
--- 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);