diff options
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index e35637915531..99d434315027 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2008,6 +2008,23 @@ static void blk_mq_release_budgets(struct request_queue *q, } /* + * blk_mq_commit_rqs will notify driver using bd->last that there is no + * more requests. (See comment in struct blk_mq_ops for commit_rqs for + * details) + * Attention, we should explicitly call this in unusual cases: + * 1) did not queue everything initially scheduled to queue + * 2) the last attempt to queue a request failed + */ +static void blk_mq_commit_rqs(struct blk_mq_hw_ctx *hctx, int queued, + bool from_schedule) +{ + if (hctx->queue->mq_ops->commit_rqs && queued) { + trace_block_unplug(hctx->queue, queued, !from_schedule); + hctx->queue->mq_ops->commit_rqs(hctx); + } +} + +/* * Returns true if we did some work AND can potentially do more. */ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list, @@ -2555,16 +2572,6 @@ void blk_mq_insert_requests(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx, spin_unlock(&ctx->lock); } -static void blk_mq_commit_rqs(struct blk_mq_hw_ctx *hctx, int *queued, - bool from_schedule) -{ - if (hctx->queue->mq_ops->commit_rqs) { - trace_block_unplug(hctx->queue, *queued, !from_schedule); - hctx->queue->mq_ops->commit_rqs(hctx); - } - *queued = 0; -} - static void blk_mq_bio_to_request(struct request *rq, struct bio *bio, unsigned int nr_segs) { @@ -2700,8 +2707,10 @@ static void blk_mq_plug_issue_direct(struct blk_plug *plug) blk_status_t ret; if (hctx != rq->mq_hctx) { - if (hctx) - blk_mq_commit_rqs(hctx, &queued, false); + if (hctx) { + blk_mq_commit_rqs(hctx, queued, false); + queued = 0; + } hctx = rq->mq_hctx; } @@ -2713,7 +2722,7 @@ static void blk_mq_plug_issue_direct(struct blk_plug *plug) case BLK_STS_RESOURCE: case BLK_STS_DEV_RESOURCE: blk_mq_request_bypass_insert(rq, false, true); - blk_mq_commit_rqs(hctx, &queued, false); + blk_mq_commit_rqs(hctx, queued, false); return; default: blk_mq_end_request(rq, ret); @@ -2727,7 +2736,7 @@ static void blk_mq_plug_issue_direct(struct blk_plug *plug) * there was more coming, but that turned out to be a lie. */ if (errors) - blk_mq_commit_rqs(hctx, &queued, false); + blk_mq_commit_rqs(hctx, queued, false); } static void __blk_mq_flush_plug_list(struct request_queue *q, |