[PATCH 1/2] sched/eevdf: Always update V if se->on_rq when reweighting

From: Tianchen Ding
Date: Sun Mar 03 2024 - 22:01:21 EST


reweight_eevdf() needs the latest V to do accurate calculation for new
ve and vd. So update V unconditionally when se is runnable.

Suggested-by: Abel Wu <wuyun.abel@xxxxxxxxxxxxx>
Signed-off-by: Tianchen Ding <dtcccc@xxxxxxxxxxxxxxxxx>
---
kernel/sched/fair.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 03be0d1330a6..5551ce2af73e 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3790,9 +3790,8 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,

if (se->on_rq) {
/* commit outstanding execution time */
- if (curr)
- update_curr(cfs_rq);
- else
+ update_curr(cfs_rq);
+ if (!curr)
__dequeue_entity(cfs_rq, se);
update_load_sub(&cfs_rq->load, se->load.weight);
}
--
2.39.3