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blk-throttle: Avoid checking bps/iops limitation if bps or iops is unlimited 

Do not need check the bps or iops limitation if bps or iops is unlimited.

Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Baolin Wang 2020-09-07 16:10:17 +08:00 committed by Jens Axboe
parent 4599ea49d4
commit 87fbeb8813
1 changed files with 12 additions and 0 deletions
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12
block/blk-throttle.c
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@ -901,6 +901,12 @@ static bool tg_with_in_iops_limit(struct throtl_grp *tg, struct bio *bio,
unsigned long jiffy_elapsed, jiffy_wait, jiffy_elapsed_rnd;
u64 tmp;
if (iops_limit == UINT_MAX) {
if (wait)
*wait = 0;
return true;
}
jiffy_elapsed = jiffies - tg->slice_start[rw];
/* Round up to the next throttle slice, wait time must be nonzero */
@ -943,6 +949,12 @@ static bool tg_with_in_bps_limit(struct throtl_grp *tg, struct bio *bio,
unsigned long jiffy_elapsed, jiffy_wait, jiffy_elapsed_rnd;
unsigned int bio_size = throtl_bio_data_size(bio);
if (bps_limit == U64_MAX) {
if (wait)
*wait = 0;
return true;
}
jiffy_elapsed = jiffy_elapsed_rnd = jiffies - tg->slice_start[rw];
/* Slice has just started. Consider one slice interval */