参照元

説明

引数

返り値

参考

実装

/**
 * __blk_run_queue - run a single device queue
 * @q:	The queue to run
 *
 * Description:
 *    See @blk_run_queue. This variant must be called with the queue lock
 *    held and interrupts disabled.
 *
 */
void __blk_run_queue(struct request_queue *q)
{
	blk_remove_plug(q);
	if (unlikely(blk_queue_stopped(q)))
		return;
	if (elv_queue_empty(q))
		return;
	/*
	 * Only recurse once to avoid overrunning the stack, let the unplug
	 * handling reinvoke the handler shortly if we already got there.
	 */
	if (!queue_flag_test_and_set(QUEUE_FLAG_REENTER, q)) {
		q->request_fn(q);
		queue_flag_clear(QUEUE_FLAG_REENTER, q);
	} else {
		queue_flag_set(QUEUE_FLAG_PLUGGED, q);
		kblockd_schedule_work(q, &q->unplug_work);
	}
}
EXPORT_SYMBOL(__blk_run_queue);

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