Commit 7901601a authored by Baolin Wang's avatar Baolin Wang Committed by Jens Axboe
Browse files

blk-throttle: Avoid getting the current time if tg->last_finish_time is 0 



We only update the tg->last_finish_time when the low limitaion is
enabled, so we can move the tg->last_finish_time validation a little
forward to avoid getting the unnecessary current time stamp if the
the low limitation is not enabled.

Signed-off-by: default avatarBaolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 4247d9c8

block/blk-throttle.c

+6 −2
Original line number Diff line number Diff line
@@ -2077,10 +2077,14 @@ static void throtl_downgrade_check(struct throtl_grp *tg) 


static void blk_throtl_update_idletime(struct throtl_grp *tg)

{

	unsigned long now = ktime_get_ns() >> 10;

	unsigned long now;

	unsigned long last_finish_time = tg->last_finish_time;



	if (now <= last_finish_time || last_finish_time == 0 ||

	if (last_finish_time == 0)

		return;



	now = ktime_get_ns() >> 10;

	if (now <= last_finish_time ||

	    last_finish_time == tg->checked_last_finish_time)

		return;