Commit 5ca7a8b3 authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring: inform block layer of how many requests we are submitting 



The block layer can use this knowledge to make smarter decisions on
how to handle the request, if it knows that N more may be coming. Switch
to using blk_start_plug_nr_ios() to pass in that information.

Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 88459b50

fs/io_uring.c

+3 −1
Original line number Diff line number Diff line
@@ -317,6 +317,7 @@ struct io_submit_state { 


	bool			plug_started;

	bool			need_plug;

	unsigned short		submit_nr;

	struct blk_plug		plug;

};
@@ -7060,7 +7061,7 @@ static int io_init_req(struct io_ring_ctx *ctx, struct io_kiocb *req, 
		if (state->need_plug && io_op_defs[opcode].plug) {

			state->plug_started = true;

			state->need_plug = false;

			blk_start_plug(&state->plug);

			blk_start_plug_nr_ios(&state->plug, state->submit_nr);

		}



		req->file = io_file_get(ctx, req, READ_ONCE(sqe->fd),
@@ -7181,6 +7182,7 @@ static void io_submit_state_start(struct io_submit_state *state, 
{

	state->plug_started = false;

	state->need_plug = max_ios > 2;

	state->submit_nr = max_ios;

	/* set only head, no need to init link_last in advance */

	state->link.head = NULL;

}