From: Pavel Begunkov <asml.silence@gmail.com>
Date: Sat, 9 Oct 2021 13:25:41 +0100
Subject: [PATCH] block: inline hot paths of blk_account_io_*()
Git-commit: be6bfe36db1795babe9d92178a47b2e02193cb0f
Patch-mainline: v5.16-rc1
References: jsc#PED-1183
Extract hot paths of __blk_account_io_start() and
__blk_account_io_done() into inline functions, so we don't always pay
for function calls.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/b0662a636bd4cc7b4f84c9d0a41efa46a688ef13.1633781740.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
block/blk-core.c | 30 +++++++++---------------------
block/blk.h | 24 +++++++++++++++++++++---
2 files changed, 30 insertions(+), 24 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index e25a1c3f8b76..80fa7aa394c7 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1180,8 +1180,7 @@ blk_status_t blk_insert_cloned_request(struct request_queue *q, struct request *
if (blk_crypto_insert_cloned_request(rq))
return BLK_STS_IOERR;
- if (blk_queue_io_stat(q))
- blk_account_io_start(rq);
+ blk_account_io_start(rq);
/*
* Since we have a scheduler attached on the top device,
@@ -1260,30 +1259,19 @@ static void blk_account_io_completion(struct request *req, unsigned int bytes)
}
}
-void blk_account_io_done(struct request *req, u64 now)
+void __blk_account_io_done(struct request *req, u64 now)
{
- /*
- * Account IO completion. flush_rq isn't accounted as a
- * normal IO on queueing nor completion. Accounting the
- * containing request is enough.
- */
- if (req->part && blk_do_io_stat(req) &&
- !(req->rq_flags & RQF_FLUSH_SEQ)) {
- const int sgrp = op_stat_group(req_op(req));
+ const int sgrp = op_stat_group(req_op(req));
- part_stat_lock();
- update_io_ticks(req->part, jiffies, true);
- part_stat_inc(req->part, ios[sgrp]);
- part_stat_add(req->part, nsecs[sgrp], now - req->start_time_ns);
- part_stat_unlock();
- }
+ part_stat_lock();
+ update_io_ticks(req->part, jiffies, true);
+ part_stat_inc(req->part, ios[sgrp]);
+ part_stat_add(req->part, nsecs[sgrp], now - req->start_time_ns);
+ part_stat_unlock();
}
-void blk_account_io_start(struct request *rq)
+void __blk_account_io_start(struct request *rq)
{
- if (!blk_do_io_stat(rq))
- return;
-
/* passthrough requests can hold bios that do not have ->bi_bdev set */
if (rq->bio && rq->bio->bi_bdev)
rq->part = rq->bio->bi_bdev;
diff --git a/block/blk.h b/block/blk.h
index 618482b29671..cab8d659d8a6 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -221,8 +221,8 @@ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
bool blk_bio_list_merge(struct request_queue *q, struct list_head *list,
struct bio *bio, unsigned int nr_segs);
-void blk_account_io_start(struct request *req);
-void blk_account_io_done(struct request *req, u64 now);
+void __blk_account_io_start(struct request *req);
+void __blk_account_io_done(struct request *req, u64 now);
/*
* Plug flush limits
@@ -286,7 +286,25 @@ int blk_dev_init(void);
*/
static inline bool blk_do_io_stat(struct request *rq)
{
- return rq->rq_disk && (rq->rq_flags & RQF_IO_STAT);
+ return (rq->rq_flags & RQF_IO_STAT) && rq->rq_disk;
+}
+
+static inline void blk_account_io_done(struct request *req, u64 now)
+{
+ /*
+ * Account IO completion. flush_rq isn't accounted as a
+ * normal IO on queueing nor completion. Accounting the
+ * containing request is enough.
+ */
+ if (blk_do_io_stat(req) && req->part &&
+ !(req->rq_flags & RQF_FLUSH_SEQ))
+ __blk_account_io_done(req, now);
+}
+
+static inline void blk_account_io_start(struct request *req)
+{
+ if (blk_do_io_stat(req))
+ __blk_account_io_start(req);
}
static inline void req_set_nomerge(struct request_queue *q, struct request *req)
--
2.35.3