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blk-throttle: Split throtl_charge_bio() into bps and iops functions 

Split throtl_charge_bio() to facilitate subsequent patches that will
separately charge bps and iops after queue separation.

Signed-off-by: Zizhi Wo <wozizhi@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Zizhi Wo <wozizhi@huaweicloud.com>
Link: https://lore.kernel.org/r/20250506020935.655574-4-wozizhi@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Zizhi Wo 2025-05-06 10:09:30 +08:00 committed by Jens Axboe
parent 3660cd4228
commit a404be5399
1 changed files with 20 additions and 15 deletions
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35
block/blk-throttle.c
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@ -787,6 +787,20 @@ static unsigned long tg_within_bps_limit(struct throtl_grp *tg, struct bio *bio,
return jiffy_wait;
}
static void throtl_charge_bps_bio(struct throtl_grp *tg, struct bio *bio)
{
unsigned int bio_size = throtl_bio_data_size(bio);
/* Charge the bio to the group */
if (!bio_flagged(bio, BIO_BPS_THROTTLED))
tg->bytes_disp[bio_data_dir(bio)] += bio_size;
}
static void throtl_charge_iops_bio(struct throtl_grp *tg, struct bio *bio)
{
tg->io_disp[bio_data_dir(bio)]++;
}
/*
* If previous slice expired, start a new one otherwise renew/extend existing
* slice to make sure it is at least throtl_slice interval long since now. New
@ -859,18 +873,6 @@ static unsigned long tg_dispatch_time(struct throtl_grp *tg, struct bio *bio)
return max(bps_wait, iops_wait);
}
static void throtl_charge_bio(struct throtl_grp *tg, struct bio *bio)
{
bool rw = bio_data_dir(bio);
unsigned int bio_size = throtl_bio_data_size(bio);
/* Charge the bio to the group */
if (!bio_flagged(bio, BIO_BPS_THROTTLED))
tg->bytes_disp[rw] += bio_size;
tg->io_disp[rw]++;
}
/**
* throtl_add_bio_tg - add a bio to the specified throtl_grp
* @bio: bio to add
@ -957,7 +959,8 @@ static void tg_dispatch_one_bio(struct throtl_grp *tg, bool rw)
bio = throtl_pop_queued(&sq->queued[rw], &tg_to_put);
sq->nr_queued[rw]--;
throtl_charge_bio(tg, bio);
throtl_charge_bps_bio(tg, bio);
throtl_charge_iops_bio(tg, bio);
/*
* If our parent is another tg, we just need to transfer @bio to
@ -1684,7 +1687,8 @@ bool __blk_throtl_bio(struct bio *bio)
while (true) {
if (tg_within_limit(tg, bio, rw)) {
/* within limits, let's charge and dispatch directly */
throtl_charge_bio(tg, bio);
throtl_charge_bps_bio(tg, bio);
throtl_charge_iops_bio(tg, bio);
/*
* We need to trim slice even when bios are not being
@ -1707,7 +1711,8 @@ bool __blk_throtl_bio(struct bio *bio)
* control algorithm is adaptive, and extra IO bytes
* will be throttled for paying the debt
*/
throtl_charge_bio(tg, bio);
throtl_charge_bps_bio(tg, bio);
throtl_charge_iops_bio(tg, bio);
} else {
/* if above limits, break to queue */
break;