Commit 87fbeb88 authored by Baolin Wang's avatar Baolin Wang Committed by Jens Axboe
Browse files

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: default avatarBaolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 4599ea49

block/blk-throttle.c

+12 −0
Original line number Diff line number Diff line
@@ -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 */