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Message-ID: <20240117085715.2614671-5-alexs@kernel.org>
Date: Wed, 17 Jan 2024 16:57:15 +0800
From: alexs@...nel.org
To: Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Steven Rostedt <rostedt@...dmis.org>,
Ben Segall <bsegall@...gle.com>,
Mel Gorman <mgorman@...e.de>,
Daniel Bristot de Oliveira <bristot@...hat.com>,
Valentin Schneider <vschneid@...hat.com>,
linux-kernel@...r.kernel.org
Cc: Alex Shi <alexs@...nel.org>
Subject: [PATCH 5/5] sched/fair: narrow the sched_use_asym_prio checking scenario
From: Alex Shi <alexs@...nel.org>
Current function doesn't match it's comments, in fact, core_idle
checking is only meaningful with non-SMT.
So make the function right.
Signed-off-by: Alex Shi <alexs@...nel.org>
To: Valentin Schneider <vschneid@...hat.com>
To: Vincent Guittot <vincent.guittot@...aro.org>
To: Peter Zijlstra <peterz@...radead.org>
To: Ingo Molnar <mingo@...hat.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 96163ab69ae0..0a321f639c79 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -9741,8 +9741,8 @@ group_type group_classify(unsigned int imbalance_pct,
*/
static bool sched_use_asym_prio(struct sched_domain *sd, int cpu)
{
- return (!sched_smt_active()) ||
- (sd->flags & SD_SHARE_CPUCAPACITY) || is_core_idle(cpu);
+ return (sd->flags & SD_SHARE_CPUCAPACITY) ||
+ (!sched_smt_active() && is_core_idle(cpu));
}
static inline bool _sched_asym(struct sched_domain *sd,
--
2.43.0
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