Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 600271d9 authored by Shaohua Li's avatar Shaohua Li Committed by Jens Axboe
Browse files

blk-mq: immediately dispatch big size request 



This is corresponding part for blk-mq. Disk with multiple hardware
queues doesn't need this as we only hold 1 request at most.

Signed-off-by: default avatarShaohua Li <shli@fb.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 50d24c34

block/blk-mq.c

+6 −1
Original line number Diff line number Diff line
@@ -1453,13 +1453,18 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio) 
	 */

	plug = current->plug;

	if (plug) {

		struct request *last = NULL;



		blk_mq_bio_to_request(rq, bio);

		if (!request_count)

			trace_block_plug(q);

		else

			last = list_entry_rq(plug->mq_list.prev);



		blk_mq_put_ctx(data.ctx);



		if (request_count >= BLK_MAX_REQUEST_COUNT) {

		if (request_count >= BLK_MAX_REQUEST_COUNT || (last &&

		    blk_rq_bytes(last) >= BLK_PLUG_FLUSH_SIZE)) {

			blk_flush_plug_list(plug, false);

			trace_block_plug(q);

		}