linux-kernel - [PATCH v2 5/6] sched/fair: pack SD_ASYM_PACKING into sched_use_asym

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Message-ID: <20240130131708.429425-5-alexs@kernel.org>
Date: Tue, 30 Jan 2024 21:17:07 +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>,
	Daniel Bristot de Oliveira <bristot@...hat.com>,
	Valentin Schneider <vschneid@...hat.com>,
	linux-kernel@...r.kernel.org,
	ricardo.neri-calderon@...ux.intel.com,
	sshegde@...ux.ibm.com
Cc: Alex Shi <alexs@...nel.org>
Subject: [PATCH v2 5/6] sched/fair: pack SD_ASYM_PACKING into sched_use_asym_prio

From: Alex Shi <alexs@...nel.org>

Then the flags check passed into sched_asym and sched_group_asym.
It's a code cleanup, no func changes.

Signed-off-by: Alex Shi <alexs@...nel.org>
To: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To: Ben Segall <bsegall@...gle.com>
To: Steven Rostedt <rostedt@...dmis.org>
To: Dietmar Eggemann <dietmar.eggemann@....com>
To: Valentin Schneider <vschneid@...hat.com>
To: Daniel Bristot de Oliveira <bristot@...hat.com>
To: Vincent Guittot <vincent.guittot@...aro.org>
To: Juri Lelli <juri.lelli@...hat.com>
To: Peter Zijlstra <peterz@...radead.org>
To: Ingo Molnar <mingo@...hat.com>
---
 kernel/sched/fair.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 835dbe77b260..6680cb39c787 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -9741,6 +9741,9 @@ group_type group_classify(unsigned int imbalance_pct,
  */
 static bool sched_use_asym_prio(struct sched_domain *sd, int cpu)
 {
+	if (!(sd->flags & SD_ASYM_PACKING))
+		return false;
+
 	return (!sched_smt_active()) ||
 		(sd->flags & SD_SHARE_CPUCAPACITY) || is_core_idle(cpu);
 }
@@ -9935,11 +9938,9 @@ static inline void update_sg_lb_stats(struct lb_env *env,
 	sgs->group_weight = group->group_weight;
 
 	/* Check if dst CPU is idle and preferred to this group */
-	if (!local_group && env->sd->flags & SD_ASYM_PACKING &&
-	    env->idle != CPU_NOT_IDLE && sgs->sum_h_nr_running &&
-	    sched_group_asym(env, sgs, group)) {
+	if (!local_group && env->idle != CPU_NOT_IDLE && sgs->sum_h_nr_running &&
+			sched_group_asym(env, sgs, group))
 		sgs->group_asym_packing = 1;
-	}
 
 	/* Check for loaded SMT group to be balanced to dst CPU */
 	if (!local_group && smt_balance(env, sgs, group))
@@ -11035,9 +11036,7 @@ static struct rq *find_busiest_queue(struct lb_env *env,
 		 * If balancing between cores, let lower priority CPUs help
 		 * SMT cores with more than one busy sibling.
 		 */
-		if ((env->sd->flags & SD_ASYM_PACKING) &&
-		    sched_asym(env->sd, i, env->dst_cpu) &&
-		    nr_running == 1)
+		if (sched_asym(env->sd, i, env->dst_cpu) && nr_running == 1)
 			continue;
 
 		switch (env->migration_type) {
@@ -11133,7 +11132,7 @@ asym_active_balance(struct lb_env *env)
 	 * the lower priority @env::dst_cpu help it. Do not follow
 	 * CPU priority.
 	 */
-	return env->idle != CPU_NOT_IDLE && (env->sd->flags & SD_ASYM_PACKING) &&
+	return env->idle != CPU_NOT_IDLE &&
 	       sched_use_asym_prio(env->sd, env->dst_cpu) &&
 	       (sched_asym_prefer(env->dst_cpu, env->src_cpu) ||
 		!sched_use_asym_prio(env->sd, env->src_cpu));
-- 
2.43.0