After weight-raise finished, bfqq->wr_coeff is reset to 1 while
bfqq->wr_cur_max_time may not be reset. For example,
Function bfq_update_bfqq_wr_on_rq_arrival will only reset wr_coeff to 1 if
bfqq is created in burst creation. Function bfq_set_budget_timeout will be
called when bfqq is selected while it's wr_cur_max_time is set and wr_coeff
is 1. Fix this by check wr_coeff > 1 before check wr_cur_max_time.
Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxx>
---
block/bfq-iosched.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index f4b4ba05f804..20ae52882235 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -3271,7 +3271,8 @@ static void bfq_set_budget_timeout(struct bfq_data *bfqd,
{
unsigned int timeout_coeff;
- if (bfqq->wr_cur_max_time == bfqd->bfq_wr_rt_max_time)
+ if (bfqq->wr_coeff > 1 &&
+ bfqq->wr_cur_max_time == bfqd->bfq_wr_rt_max_time)
timeout_coeff = 1;
else
timeout_coeff = bfqq->entity.weight / bfqq->entity.orig_weight;
--
2.30.0
