Commit 060406c6 authored by Yu Kuai's avatar Yu Kuai Committed by Jens Axboe
Browse files

block: add plug while submitting IO 



So that if caller didn't use plug, for example, __blkdev_direct_IO_simple()
and __blkdev_direct_IO_async(), block layer can still benefit from caching
nsec time in the plug.

Signed-off-by: default avatarYu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20240509123825.3225207-1-yukuai1@huaweicloud.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 3a861560

block/blk-core.c

+6 −0
Original line number Diff line number Diff line
@@ -646,11 +646,13 @@ static void __submit_bio(struct bio *bio) 
static void __submit_bio_noacct(struct bio *bio)

{

	struct bio_list bio_list_on_stack[2];

	struct blk_plug plug;



	BUG_ON(bio->bi_next);



	bio_list_init(&bio_list_on_stack[0]);

	current->bio_list = bio_list_on_stack;

	blk_start_plug(&plug);



	do {

		struct request_queue *q = bdev_get_queue(bio->bi_bdev);
@@ -684,19 +686,23 @@ static void __submit_bio_noacct(struct bio *bio) 
		bio_list_merge(&bio_list_on_stack[0], &bio_list_on_stack[1]);

	} while ((bio = bio_list_pop(&bio_list_on_stack[0])));



	blk_finish_plug(&plug);

	current->bio_list = NULL;

}



static void __submit_bio_noacct_mq(struct bio *bio)

{

	struct bio_list bio_list[2] = { };

	struct blk_plug plug;



	current->bio_list = bio_list;

	blk_start_plug(&plug);



	do {

		__submit_bio(bio);

	} while ((bio = bio_list_pop(&bio_list[0])));



	blk_finish_plug(&plug);

	current->bio_list = NULL;

}