linux-kernel - [PATCH v3 06/14] blk-mq: remove unncessary from_schedule parameter in blk_mq_plug_issue

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Message-Id: <20230111130159.3741753-7-shikemeng@huaweicloud.com>
Date:   Wed, 11 Jan 2023 21:01:51 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     hch@....de, axboe@...nel.dk, dwagner@...e.de, hare@...e.de,
        ming.lei@...hat.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     john.garry@...wei.com, jack@...e.cz
Subject: [PATCH v3 06/14] blk-mq: remove unncessary from_schedule parameter in blk_mq_plug_issue_direct

Function blk_mq_plug_issue_direct tries to issue batch requests in plug
list to driver directly. We will only issue plug request to driver if we
are not from scheduler, so from_scheduler parameter of
blk_mq_plug_issue_direct is always false, so as the blk_mq_commit_rqs
which is only called in blk_mq_plug_issue_direct.
Remove unncessary from_scheduler of blk_mq_plug_issue_direct and
blk_mq_commit_rqs.

Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 block/blk-mq.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index ca2be137d6db..c6cc3feb3b84 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2555,11 +2555,10 @@ 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)
+static void blk_mq_commit_rqs(struct blk_mq_hw_ctx *hctx, int *queued)
 {
 	if (hctx->queue->mq_ops->commit_rqs) {
-		trace_block_unplug(hctx->queue, *queued, !from_schedule);
+		trace_block_unplug(hctx->queue, *queued, true);
 		hctx->queue->mq_ops->commit_rqs(hctx);
 	}
 	*queued = 0;
@@ -2688,7 +2687,7 @@ static blk_status_t blk_mq_request_issue_directly(struct request *rq, bool last)
 	return __blk_mq_try_issue_directly(rq->mq_hctx, rq, true, last);
 }
 
-static void blk_mq_plug_issue_direct(struct blk_plug *plug, bool from_schedule)
+static void blk_mq_plug_issue_direct(struct blk_plug *plug)
 {
 	struct blk_mq_hw_ctx *hctx = NULL;
 	struct request *rq;
@@ -2701,7 +2700,7 @@ static void blk_mq_plug_issue_direct(struct blk_plug *plug, bool from_schedule)
 
 		if (hctx != rq->mq_hctx) {
 			if (hctx)
-				blk_mq_commit_rqs(hctx, &queued, from_schedule);
+				blk_mq_commit_rqs(hctx, &queued);
 			hctx = rq->mq_hctx;
 		}
 
@@ -2713,7 +2712,7 @@ static void blk_mq_plug_issue_direct(struct blk_plug *plug, bool from_schedule)
 		case BLK_STS_RESOURCE:
 		case BLK_STS_DEV_RESOURCE:
 			blk_mq_request_bypass_insert(rq, false, true);
-			blk_mq_commit_rqs(hctx, &queued, from_schedule);
+			blk_mq_commit_rqs(hctx, &queued);
 			return;
 		default:
 			blk_mq_end_request(rq, ret);
@@ -2727,7 +2726,7 @@ static void blk_mq_plug_issue_direct(struct blk_plug *plug, bool from_schedule)
 	 * there was more coming, but that turned out to be a lie.
 	 */
 	if (errors)
-		blk_mq_commit_rqs(hctx, &queued, from_schedule);
+		blk_mq_commit_rqs(hctx, &queued);
 }
 
 static void __blk_mq_flush_plug_list(struct request_queue *q,
@@ -2798,7 +2797,7 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule)
 		}
 
 		blk_mq_run_dispatch_ops(q,
-				blk_mq_plug_issue_direct(plug, false));
+				blk_mq_plug_issue_direct(plug));
 		if (rq_list_empty(plug->mq_list))
 			return;
 	}
-- 
2.30.0