[PATCH 5.15 071/731] sched/fair: Removed useless update of p->recent_used_cpu

Greg Kroah-Hartman
2022-12-28T14:49:11Z

From: Vincent Guittot <vincent.guittot@linaro.org>

[ Upstream commit a7ba894821b6ade7bb420455f87020b2838d6180 ]

Since commit 89aafd67f28c ("sched/fair: Use prev instead of new target as recent_used_cpu"),
p->recent_used_cpu is unconditionnaly set with prev.

Fixes: 89aafd67f28c ("sched/fair: Use prev instead of new target as recent_used_cpu")
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Link: https://lkml.kernel.org/r/20210928103544.27489-1-vincent.guittot@linaro.org
Stable-dep-of: a2e7f03ed28f ("sched/uclamp: Make asym_fits_capacity() use util_fits_cpu()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
kernel/sched/fair.c | 5 -----
1 file changed, 5 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 9e2c6e38342c..d706c1a8453a 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6595,11 +6595,6 @@ static int select_idle_sibling(struct task_struct *p, int prev, int target)
(available_idle_cpu(recent_used_cpu) || sched_idle_cpu(recent_used_cpu)) &&
cpumask_test_cpu(p->recent_used_cpu, p->cpus_ptr) &&
asym_fits_capacity(task_util, recent_used_cpu)) {
- /*
- * Replace recent_used_cpu with prev as it is a potential
- * candidate for the next wake:
- */
- p->recent_used_cpu = prev;
return recent_used_cpu;
}

--
2.35.1