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List:       dm-devel
Subject:    [dm-devel] [PATCH V4 06/12] block/mq: extract one helper function polling hw queue
From:       Ming Lei <ming.lei () redhat ! com>
Date:       2021-03-29 15:26:16
Message-ID: 20210329152622.173035-7-ming.lei () redhat ! com
[Download RAW message or body]

From: Jeffle Xu <jefflexu@linux.alibaba.com>

Extract the logic of polling one hw queue and related statistics
handling out as the helper function.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 block/blk-mq.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 1ada2c0e76b1..0cb88c719916 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3852,6 +3852,19 @@ static bool blk_mq_poll_hybrid(struct request_queue *q,
 	return blk_mq_poll_hybrid_sleep(q, rq);
 }
 
+static inline int blk_mq_poll_hctx(struct request_queue *q,
+				   struct blk_mq_hw_ctx *hctx)
+{
+	int ret;
+
+	hctx->poll_invoked++;
+	ret = q->mq_ops->poll(hctx);
+	if (ret > 0)
+		hctx->poll_success++;
+
+	return ret;
+}
+
 static int blk_bio_poll(struct request_queue *q, blk_qc_t cookie, bool spin)
 {
 	/*
@@ -3908,11 +3921,8 @@ int blk_poll(struct request_queue *q, blk_qc_t cookie, bool spin)
 	do {
 		int ret;
 
-		hctx->poll_invoked++;
-
-		ret = q->mq_ops->poll(hctx);
+		ret = blk_mq_poll_hctx(q, hctx);
 		if (ret > 0) {
-			hctx->poll_success++;
 			__set_current_state(TASK_RUNNING);
 			return ret;
 		}
-- 
2.29.2

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