The following commit has been merged into the sched/core branch of tip:
Commit-ID: 9264758066061e660c86e48cff1bac4a58a7324a
Gitweb: https://git.kernel.org/tip/9264758066061e660c86e48cff1bac4a58a7324a
Author: Vincent Guittot <vincent.guittot@linaro.org>
AuthorDate: Fri, 13 Feb 2026 11:17:51 +01:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Mon, 23 Feb 2026 18:04:11 +01:00
sched/fair: Update overutilized detection
Checking uclamp_min is useless and counterproductive for overutilized state
as misfit can now happen without being in overutilized state.
Since commit e5ed0550c04c ("sched/fair: unlink misfit task from cpu overutilized")
util_fits_cpu returns -1 when uclamp_min is above capacity which is not
considered as cpu overutilized.
Remove the useless rq_util_min parameter.
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Qais Yousef <qyousef@layalina.io>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
Link: https://patch.msgid.link/20260213101751.3121899-1-vincent.guittot@linaro.org
---
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 23315c2..b8b052b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7018,16 +7018,15 @@ static inline void hrtick_update(struct rq *rq)
static inline bool cpu_overutilized(int cpu)
{
- unsigned long rq_util_min, rq_util_max;
+ unsigned long rq_util_max;
if (!sched_energy_enabled())
return false;
- rq_util_min = uclamp_rq_get(cpu_rq(cpu), UCLAMP_MIN);
rq_util_max = uclamp_rq_get(cpu_rq(cpu), UCLAMP_MAX);
/* Return true only if the utilization doesn't fit CPU's capacity */
- return !util_fits_cpu(cpu_util_cfs(cpu), rq_util_min, rq_util_max, cpu);
+ return !util_fits_cpu(cpu_util_cfs(cpu), 0, rq_util_max, cpu);
}
/*