Commit b9151e7b authored by Douglas Anderson's avatar Douglas Anderson Committed by Jens Axboe
Browse files

blk-mq: Add blk_mq_delay_run_hw_queues() API call 



We have:
* blk_mq_run_hw_queue()
* blk_mq_delay_run_hw_queue()
* blk_mq_run_hw_queues()

...but not blk_mq_delay_run_hw_queues(), presumably because nobody
needed it before now.  Since we need it for a later patch in this
series, add it.

Signed-off-by: default avatarDouglas Anderson <dianders@chromium.org>
Reviewed-by: default avatarMing Lei <ming.lei@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent ab3cee37

block/blk-mq.c

+19 −0
Original line number Diff line number Diff line
@@ -1545,6 +1545,25 @@ void blk_mq_run_hw_queues(struct request_queue *q, bool async) 
}

EXPORT_SYMBOL(blk_mq_run_hw_queues);



/**

 * blk_mq_delay_run_hw_queues - Run all hardware queues asynchronously.

 * @q: Pointer to the request queue to run.

 * @msecs: Microseconds of delay to wait before running the queues.

 */

void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs)

{

	struct blk_mq_hw_ctx *hctx;

	int i;



	queue_for_each_hw_ctx(q, hctx, i) {

		if (blk_mq_hctx_stopped(hctx))

			continue;



		blk_mq_delay_run_hw_queue(hctx, msecs);

	}

}

EXPORT_SYMBOL(blk_mq_delay_run_hw_queues);



/**

 * blk_mq_queue_stopped() - check whether one or more hctxs have been stopped

 * @q: request queue.

include/linux/blk-mq.h

+1 −0
Original line number Diff line number Diff line
@@ -508,6 +508,7 @@ void blk_mq_unquiesce_queue(struct request_queue *q); 
void blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs);

void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);

void blk_mq_run_hw_queues(struct request_queue *q, bool async);

void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs);

void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset,

		busy_tag_iter_fn *fn, void *priv);

void blk_mq_tagset_wait_completed_request(struct blk_mq_tag_set *tagset);

CRA Git | Maintained and supported by SUSTech CRA and CCSE