From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932181Ab3L3NsL (ORCPT ); Mon, 30 Dec 2013 08:48:11 -0500 Received: from mail-we0-f174.google.com ([74.125.82.174]:35965 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755914Ab3L3No6 (ORCPT ); Mon, 30 Dec 2013 08:44:58 -0500 From: Daniel Lezcano To: mingo@redhat.com, peterz@infradead.org Cc: linux-kernel@vger.kernel.org, linaro-kernel@lists.linaro.org Subject: [PATCH 1/7] sched: reduce nohz_kick_needed parameters Date: Mon, 30 Dec 2013 14:44:47 +0100 Message-Id: <1388411093-3413-2-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1388411093-3413-1-git-send-email-daniel.lezcano@linaro.org> References: <1388411093-3413-1-git-send-email-daniel.lezcano@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The cpu information is already stored in the struct rq, so no need to pass it as parameter to the nohz_kick_needed function. The caller of this function just called idle_cpu() before to fill the rq->idle_balance field. Use rq->cpu and rq->idle_balance. Signed-off-by: Daniel Lezcano --- kernel/sched/fair.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 600301c..4cb414a 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6781,14 +6781,14 @@ end: * - For SD_ASYM_PACKING, if the lower numbered cpu's in the scheduler * domain span are idle. */ -static inline int nohz_kick_needed(struct rq *rq, int cpu) +static inline int nohz_kick_needed(struct rq *rq) { unsigned long now = jiffies; struct sched_domain *sd; struct sched_group_power *sgp; - int nr_busy; + int nr_busy, cpu = rq->cpu; - if (unlikely(idle_cpu(cpu))) + if (unlikely(rq->idle_balance)) return 0; /* @@ -6878,7 +6878,7 @@ void trigger_load_balance(struct rq *rq) likely(!on_null_domain(cpu))) raise_softirq(SCHED_SOFTIRQ); #ifdef CONFIG_NO_HZ_COMMON - if (nohz_kick_needed(rq, cpu) && likely(!on_null_domain(cpu))) + if (nohz_kick_needed(rq) && likely(!on_null_domain(cpu))) nohz_balancer_kick(cpu); #endif } -- 1.7.9.5