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Message-Id: <20250701024549.40166-2-adamli@os.amperecomputing.com>
Date: Tue, 1 Jul 2025 02:45:48 +0000
From: Adam Li <adamli@...amperecomputing.com>
To: mingo@...hat.com,
peterz@...radead.org,
juri.lelli@...hat.com,
vincent.guittot@...aro.org
Cc: dietmar.eggemann@....com,
rostedt@...dmis.org,
bsegall@...gle.com,
mgorman@...e.de,
vschneid@...hat.com,
cl@...ux.com,
linux-kernel@...r.kernel.org,
patches@...erecomputing.com,
Adam Li <adamli@...amperecomputing.com>
Subject: [PATCH 1/2] sched/fair: Only update stats for allowed CPUs when looking for dst group
A task may not use all the CPUs in a schedule group due to CPU affinity.
Only update schedule group statistics for allowed CPUs.
Signed-off-by: Adam Li <adamli@...amperecomputing.com>
---
kernel/sched/fair.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 7a14da5396fb..78a3d9b78e07 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -10693,7 +10693,7 @@ static inline void update_sg_wakeup_stats(struct sched_domain *sd,
if (sd->flags & SD_ASYM_CPUCAPACITY)
sgs->group_misfit_task_load = 1;
- for_each_cpu(i, sched_group_span(group)) {
+ for_each_cpu_and(i, sched_group_span(group), p->cpus_ptr) {
struct rq *rq = cpu_rq(i);
unsigned int local;
--
2.34.1
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