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From: "tip-bot2 for Vincent Donnefort" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Vincent Donnefort <vincent.donnefort@arm.com>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>,
	Quentin Perret <qperret@google.com>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: sched/core] sched/fair: use lsub_positive in cpu_util_next()
Date: Sat, 06 Mar 2021 11:42:21 -0000	[thread overview]
Message-ID: <161503094130.398.6124387493467624368.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20210225083612.1113823-3-vincent.donnefort@arm.com>

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

Commit-ID:     736cc6b31102236a55470c72523ed0a65eb3f804
Gitweb:        https://git.kernel.org/tip/736cc6b31102236a55470c72523ed0a65eb3f804
Author:        Vincent Donnefort <vincent.donnefort@arm.com>
AuthorDate:    Thu, 25 Feb 2021 08:36:12 
Committer:     Ingo Molnar <mingo@kernel.org>
CommitterDate: Sat, 06 Mar 2021 12:40:22 +01:00

sched/fair: use lsub_positive in cpu_util_next()

The sub_positive local version is saving an explicit load-store and is
enough for the cpu_util_next() usage.

Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Quentin Perret <qperret@google.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lkml.kernel.org/r/20210225083612.1113823-3-vincent.donnefort@arm.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 b994db9..7b2fac0 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6471,7 +6471,7 @@ static unsigned long cpu_util_next(int cpu, struct task_struct *p, int dst_cpu)
 	 * util_avg should already be correct.
 	 */
 	if (task_cpu(p) == cpu && dst_cpu != cpu)
-		sub_positive(&util, task_util(p));
+		lsub_positive(&util, task_util(p));
 	else if (task_cpu(p) != cpu && dst_cpu == cpu)
 		util += task_util(p);
 

  parent reply	other threads:[~2021-03-06 11:43 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-25  8:36 [PATCH v2 0/2] Fix task utilization accountability for EAS vincent.donnefort
2021-02-25  8:36 ` [PATCH v2 1/2] sched/fair: Fix task utilization accountability in compute_energy() vincent.donnefort
2021-02-25  8:52   ` Quentin Perret
2021-02-25 11:45   ` Dietmar Eggemann
2021-02-25 11:58     ` Quentin Perret
2021-02-25 16:23     ` Vincent Donnefort
2021-03-02  9:01   ` [tip: sched/core] " tip-bot2 for Vincent Donnefort
2021-03-03  9:49   ` tip-bot2 for Vincent Donnefort
2021-03-06 11:42   ` tip-bot2 for Vincent Donnefort
2021-02-25  8:36 ` [PATCH v2 2/2] sched/fair: use lsub_positive in cpu_util_next() vincent.donnefort
2021-02-25  8:53   ` Quentin Perret
2021-02-25 11:46   ` Dietmar Eggemann
2021-03-02  9:01   ` [tip: sched/core] " tip-bot2 for Vincent Donnefort
2021-03-03  9:49   ` tip-bot2 for Vincent Donnefort
2021-03-06 11:42   ` tip-bot2 for Vincent Donnefort [this message]
2021-02-25 17:29 ` [PATCH v2 0/2] Fix task utilization accountability for EAS Peter Zijlstra

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