linux-kernel - Re: [PATCH v3 3/3] sched: clean-up struct sd_lb

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Date:	Thu, 15 Aug 2013 13:14:28 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>
Cc:	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	Mike Galbraith <efault@....de>, Paul Turner <pjt@...gle.com>,
	Alex Shi <alex.shi@...el.com>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Morten Rasmussen <morten.rasmussen@....com>,
	Namhyung Kim <namhyung@...nel.org>,
	Joonsoo Kim <js1304@...il.com>
Subject: Re: [PATCH v3 3/3] sched: clean-up struct sd_lb_stat


Another little diff.


--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4647,8 +4647,10 @@ static inline void update_sd_lb_stats(st
 		int local_group;
 
 		local_group = cpumask_test_cpu(env->dst_cpu, sched_group_cpus(sg));
-		if (local_group)
+		if (local_group) {
+			sds->this = sg;
 			sgs = &sds->this_stat;
+		}
 
 		memset(sgs, 0, sizeof(*sgs));
 		update_sg_lb_stats(env, sg, load_idx, local_group, sgs);
@@ -4671,9 +4673,7 @@ static inline void update_sd_lb_stats(st
 		sds->total_load += sgs->group_load;
 		sds->total_pwr += sg->sgp->power;
 
-		if (local_group)
-			sds->this = sg;
-		else if (update_sd_pick_busiest(env, sds, sg, sgs)) {
+		if (!local_group && update_sd_pick_busiest(env, sds, sg, sgs)) {
 			sds->busiest = sg;
 			sds->busiest_stat = *sgs;
 		}
--
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