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From: Jens Axboe <axboe@kernel.dk>
To: linux-block@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@infradead.org>
Subject: [PATCH 05/14] block: don't call blk_status_to_errno() for success status
Date: Sat, 16 Oct 2021 19:37:39 -0600	[thread overview]
Message-ID: <20211017013748.76461-6-axboe@kernel.dk> (raw)
In-Reply-To: <20211017013748.76461-1-axboe@kernel.dk>

We only need to call it to resolve the blk_status_t -> errno mapping
if the status is different than BLK_STS_OK. Check that it is before
doing so.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-mq.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index ffccc5f0f66a..fa5b12200404 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -676,9 +676,11 @@ static void blk_account_io_completion(struct request *req, unsigned int bytes)
 bool blk_update_request(struct request *req, blk_status_t error,
 		unsigned int nr_bytes)
 {
-	int total_bytes;
+	int total_bytes, blk_errno = 0;
 
-	trace_block_rq_complete(req, blk_status_to_errno(error), nr_bytes);
+	if (unlikely(error != BLK_STS_OK))
+		blk_errno = blk_status_to_errno(error);
+	trace_block_rq_complete(req, blk_errno, nr_bytes);
 
 	if (!req->bio)
 		return false;
-- 
2.33.1


  parent reply	other threads:[~2021-10-17  1:37 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-17  1:37 [PATCHSET 0/14] Various block layer optimizations Jens Axboe
2021-10-17  1:37 ` [PATCH 01/14] block: inline fast path of driver tag allocation Jens Axboe
2021-10-18  8:42   ` Christoph Hellwig
2021-10-18 14:38     ` Jens Axboe
2021-10-17  1:37 ` [PATCH 02/14] block: don't bother iter advancing a fully done bio Jens Axboe
2021-10-18  8:42   ` Christoph Hellwig
2021-10-17  1:37 ` [PATCH 03/14] block: remove useless caller argument to print_req_error() Jens Axboe
2021-10-18  8:42   ` Christoph Hellwig
2021-10-17  1:37 ` [PATCH 04/14] block: move update request helpers into blk-mq.c Jens Axboe
2021-10-18  8:43   ` Christoph Hellwig
2021-10-17  1:37 ` Jens Axboe [this message]
2021-10-18  8:53   ` [PATCH 05/14] block: don't call blk_status_to_errno() for success status Christoph Hellwig
2021-10-18 10:49   ` Pavel Begunkov
2021-10-17  1:37 ` [PATCH 06/14] block: store elevator state in request Jens Axboe
2021-10-18  8:58   ` Christoph Hellwig
2021-10-18 14:34     ` Jens Axboe
2021-10-19 22:21   ` Guillaume Tucker
2021-10-19 22:26     ` Jens Axboe
2021-10-17  1:37 ` [PATCH 07/14] block: change plugging to use a singly linked list Jens Axboe
2021-10-17  4:45   ` kernel test robot
2021-10-17  4:45     ` kernel test robot
2021-10-18  9:19   ` Christoph Hellwig
2021-10-18 16:10     ` Jens Axboe
2021-10-18 12:56   ` Pavel Begunkov
2021-10-18 13:34     ` Jens Axboe
2021-10-24 14:09   ` kernel test robot
2021-10-17  1:37 ` [PATCH 08/14] block: improve layout of struct request Jens Axboe
2021-10-18  9:19   ` Christoph Hellwig
2021-10-17  1:37 ` [PATCH 09/14] block: only mark bio as tracked if it really is tracked Jens Axboe
2021-10-18  9:19   ` Christoph Hellwig
2021-10-17  1:37 ` [PATCH 10/14] block: move blk_mq_tag_to_rq() inline Jens Axboe
2021-10-17  1:37 ` [PATCH 11/14] block: optimize blk_mq_rq_ctx_init() Jens Axboe
2021-10-18  9:20   ` Christoph Hellwig
2021-10-17  1:37 ` [PATCH 12/14] block: align blkdev_dio inlined bio to a cacheline Jens Axboe
2021-10-18  9:21   ` Christoph Hellwig
2021-10-18 14:36     ` Jens Axboe
2021-10-17  1:37 ` [PATCH 13/14] block: remove debugfs blk_mq_ctx dispatched/merged/completed attributes Jens Axboe
2021-10-18  9:21   ` Christoph Hellwig
2021-10-17  1:37 ` [PATCH 14/14] block: remove some blk_mq_hw_ctx debugfs entries Jens Axboe
2021-10-18  9:22   ` Christoph Hellwig

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