Commit 2bc4d7a3 authored by Chengming Zhou's avatar Chengming Zhou Committed by Jens Axboe
Browse files

blk-mq: delete redundant tagset map update when fallback 



When we increase nr_hw_queues fail, the fallback path will use
blk_mq_update_queue_map() to clear and update all maps.
Obviously, this line of update of HCTX_TYPE_DEFAULT only is not
needed, so delete it.

Signed-off-by: default avatarChengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: default avatarMing Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230821095602.70742-2-chengming.zhou@linux.dev


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent e1dd7bc9

block/blk-mq.c

+0 −1
Original line number Diff line number Diff line
@@ -4730,7 +4730,6 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, 
				__blk_mq_free_map_and_rqs(set, i);



			set->nr_hw_queues = prev_nr_hw_queues;

			blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]);

			goto fallback;

		}

		blk_mq_map_swqueue(q);