diff options
| -rw-r--r-- | block/blk-exec.c | 2 | ||||
| -rw-r--r-- | block/blk-mq.c | 17 | ||||
| -rw-r--r-- | include/linux/blk-mq.h | 3 |
3 files changed, 13 insertions, 9 deletions
diff --git a/block/blk-exec.c b/block/blk-exec.c index bbfc072a79c2..c68613bb4c79 100644 --- a/block/blk-exec.c +++ b/block/blk-exec.c @@ -65,7 +65,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk, * be resued after dying flag is set */ if (q->mq_ops) { - blk_mq_insert_request(q, rq, true); + blk_mq_insert_request(q, rq, at_head, true); return; } diff --git a/block/blk-mq.c b/block/blk-mq.c index 9072d0ab184f..c9306e3403fe 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -714,13 +714,16 @@ static void blk_mq_work_fn(struct work_struct *work) } static void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx, - struct request *rq) + struct request *rq, bool at_head) { struct blk_mq_ctx *ctx = rq->mq_ctx; trace_block_rq_insert(hctx->queue, rq); - list_add_tail(&rq->queuelist, &ctx->rq_list); + if (at_head) + list_add(&rq->queuelist, &ctx->rq_list); + else + list_add_tail(&rq->queuelist, &ctx->rq_list); blk_mq_hctx_mark_pending(hctx, ctx); /* @@ -730,7 +733,7 @@ static void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx, } void blk_mq_insert_request(struct request_queue *q, struct request *rq, - bool run_queue) + bool at_head, bool run_queue) { struct blk_mq_hw_ctx *hctx; struct blk_mq_ctx *ctx, *current_ctx; @@ -749,7 +752,7 @@ void blk_mq_insert_request(struct request_queue *q, struct request *rq, rq->mq_ctx = ctx; } spin_lock(&ctx->lock); - __blk_mq_insert_request(hctx, rq); + __blk_mq_insert_request(hctx, rq, at_head); spin_unlock(&ctx->lock); blk_mq_put_ctx(current_ctx); @@ -781,7 +784,7 @@ void blk_mq_run_request(struct request *rq, bool run_queue, bool async) /* ctx->cpu might be offline */ spin_lock(&ctx->lock); - __blk_mq_insert_request(hctx, rq); + __blk_mq_insert_request(hctx, rq, false); spin_unlock(&ctx->lock); blk_mq_put_ctx(current_ctx); @@ -819,7 +822,7 @@ static void blk_mq_insert_requests(struct request_queue *q, rq = list_first_entry(list, struct request, queuelist); list_del_init(&rq->queuelist); rq->mq_ctx = ctx; - __blk_mq_insert_request(hctx, rq); + __blk_mq_insert_request(hctx, rq, false); } spin_unlock(&ctx->lock); @@ -971,7 +974,7 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio) __blk_mq_free_request(hctx, ctx, rq); else { blk_mq_bio_to_request(rq, bio); - __blk_mq_insert_request(hctx, rq); + __blk_mq_insert_request(hctx, rq, false); } spin_unlock(&ctx->lock); diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 1e8f16f65af4..b7638be58599 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -122,7 +122,8 @@ void blk_mq_init_commands(struct request_queue *, void (*init)(void *data, struc void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule); -void blk_mq_insert_request(struct request_queue *, struct request *, bool); +void blk_mq_insert_request(struct request_queue *, struct request *, + bool, bool); void blk_mq_run_queues(struct request_queue *q, bool async); void blk_mq_free_request(struct request *rq); bool blk_mq_can_queue(struct blk_mq_hw_ctx *); |