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Subject[PATCH 6/8] blk-iocost: Avoid to call current_hweight_max if iocg->inuse == iocg->active
Date
The old_hwi is already max hweight_inuse if iocg->inuse == iocg->active.
Remove unnecessary calculation.

Signed-off-by: Kemeng Shi <shikemeng@huawei.com>
---
block/blk-iocost.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 96c1571a8a1d..fa90f471dfdc 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2299,7 +2299,10 @@ static void ioc_timer_fn(struct timer_list *timer)
* Determine the donation amount.
*/
current_hweight(iocg, &hwa, &old_hwi);
- hwm = current_hweight_max(iocg);
+ if (iocg->inuse == iocg->active)
+ hwm = old_hwi;
+ else
+ hwm = current_hweight_max(iocg);
new_hwi = hweight_after_donation(iocg, old_hwi, hwm,
usage, &now);
/*
--
2.30.0
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