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From: Shrikanth Hegde <sshegde@linux.ibm.com>
To: mingo@kernel.org, peterz@infradead.org,
	vincent.guittot@linaro.org, linux-kernel@vger.kernel.org
Cc: sshegde@linux.ibm.com, kprateek.nayak@amd.com,
	juri.lelli@redhat.com, vschneid@redhat.com, tglx@linutronix.de,
	dietmar.eggemann@arm.com, frederic@kernel.org,
	longman@redhat.com
Subject: [PATCH 2/2] sched/fair: get this cpu once in find_new_ilb
Date: Thu, 19 Mar 2026 12:23:14 +0530	[thread overview]
Message-ID: <20260319065314.343932-3-sshegde@linux.ibm.com> (raw)
In-Reply-To: <20260319065314.343932-1-sshegde@linux.ibm.com>

smp_processor_id() is pointless to fetch in the loop. Move it out.
No functional change.

Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
---
 kernel/sched/fair.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 02cca2c7a98d..9e561c1234b2 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -12635,11 +12635,11 @@ static inline int on_null_domain(struct rq *rq)
  */
 static inline int find_new_ilb(struct cpumask *cpus)
 {
+	int this_cpu = smp_processor_id();
 	int ilb_cpu;
 
 	for_each_cpu(ilb_cpu, cpus) {
-
-		if (ilb_cpu == smp_processor_id())
+		if (ilb_cpu == this_cpu)
 			continue;
 
 		if (idle_cpu(ilb_cpu))
-- 
2.43.0


  parent reply	other threads:[~2026-03-19  6:54 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-19  6:53 [PATCH 0/2] sched/fair: Minor improvements while triggering idle load balance Shrikanth Hegde
2026-03-19  6:53 ` [PATCH 1/2] sched/fair: consider hk_mask early in triggering ilb Shrikanth Hegde
2026-03-19  8:15   ` Mukesh Kumar Chaurasiya
2026-03-19 13:13     ` Shrikanth Hegde
2026-03-19 22:58   ` Shubhang Kaushik
2026-03-20  2:47     ` Shrikanth Hegde
2026-03-20  3:37   ` K Prateek Nayak
2026-03-20  9:19     ` Shrikanth Hegde
2026-03-20 11:43       ` Peter Zijlstra
2026-03-20 14:12         ` Shrikanth Hegde
2026-03-20 14:28           ` Shrikanth Hegde
2026-03-19  6:53 ` Shrikanth Hegde [this message]
2026-03-19  8:18   ` [PATCH 2/2] sched/fair: get this cpu once in find_new_ilb Mukesh Kumar Chaurasiya
2026-03-19  9:20   ` Peter Zijlstra
2026-03-19 13:03     ` Shrikanth Hegde
2026-03-19 13:39       ` Peter Zijlstra
2026-03-20  3:40   ` K Prateek Nayak

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