Commit 4ab32bf3 authored by Jens Axboe's avatar Jens Axboe
Browse files

blk-mq: never redirect polled IO completions 



It's pointless to do so, we are by definition on the CPU we want/need
to be, as that's the one waiting for a completion event.

Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent aa61bec3

block/blk-mq.c

+6 −1
Original line number Diff line number Diff line
@@ -585,7 +585,12 @@ static void __blk_mq_complete_request(struct request *rq) 
		return;

	}



	if (!test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags)) {

	/*

	 * For a polled request, always complete locallly, it's pointless

	 * to redirect the completion.

	 */

	if ((rq->cmd_flags & REQ_HIPRI) ||

	    !test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags)) {

		q->mq_ops->complete(rq);

		return;

	}