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block: inline hot paths of blk_account_io_*()

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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>
This commit is contained in:
Pavel Begunkov 2021-10-09 13:25:41 +01:00 committed by Jens Axboe
parent 8a709512ea
commit be6bfe36db
2 changed files with 30 additions and 24 deletions
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30
block/blk-core.c
View File

@ -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;

24
block/blk.h
View File

@ -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)