From 2385ebf38f94d4f7761b1e9a4973d04753da02c2 Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Fri, 3 Dec 2021 16:17:03 +0800 Subject: [PATCH] block: null_blk: batched complete poll requests Complete poll requests via blk_mq_add_to_batch() and blk_mq_end_request_batch(), so that we can cover batched complete code path by running null_blk test. Meantime this way shows ~14% IOPS boost on 't/io_uring /dev/nullb0' in my test. Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20211203081703.3506020-1-ming.lei@redhat.com Signed-off-by: Jens Axboe --- drivers/block/null_blk/main.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index b4ff5ae..20534a2 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -1574,7 +1574,9 @@ static int null_poll(struct blk_mq_hw_ctx *hctx, struct io_comp_batch *iob) cmd = blk_mq_rq_to_pdu(req); cmd->error = null_process_cmd(cmd, req_op(req), blk_rq_pos(req), blk_rq_sectors(req)); - end_cmd(cmd); + if (!blk_mq_add_to_batch(req, iob, cmd->error, + blk_mq_end_request_batch)) + end_cmd(cmd); nr++; } -- 2.7.4