[tip: sched/core] sched/fair: Removed useless update of p->recent_used_cpu

[tip-bot2 for Vincent Guittot]

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     a7ba894821b6ade7bb420455f87020b2838d6180
Gitweb:        https://git.kernel.org/tip/a7ba894821b6ade7bb420455f87020b2838d6180
Author:        Vincent Guittot <vincent.guittot@xxxxxxxxxx>
AuthorDate:    Tue, 28 Sep 2021 12:35:44 +02:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Tue, 05 Oct 2021 15:52:17 +02:00

sched/fair: Removed useless update of p->recent_used_cpu

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@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxx>
Link: https://lkml.kernel.org/r/20210928103544.27489-1-vincent.guittot@xxxxxxxxxx
---
 kernel/sched/fair.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index c50ae23..2468d1d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6413,11 +6413,6 @@ 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;
 	}