Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752696AbbGOH52 (ORCPT ); Wed, 15 Jul 2015 03:57:28 -0400 Received: from mga02.intel.com ([134.134.136.20]:51617 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752122AbbGOH4S (ORCPT ); Wed, 15 Jul 2015 03:56:18 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,477,1432623600"; d="scan'208";a="729197891" From: Yuyang Du To: mingo@kernel.org, peterz@infradead.org, linux-kernel@vger.kernel.org Cc: pjt@google.com, bsegall@google.com, morten.rasmussen@arm.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, umgwanakikbuti@gmail.com, len.brown@intel.com, rafael.j.wysocki@intel.com, arjan@linux.intel.com, fengguang.wu@intel.com, Yuyang Du Subject: [PATCH v10 3/7] sched: Implement update_blocked_averages() for CONFIG_FAIR_GROUP_SCHED=n Date: Wed, 15 Jul 2015 08:04:38 +0800 Message-Id: <1436918682-4971-4-git-send-email-yuyang.du@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1436918682-4971-1-git-send-email-yuyang.du@intel.com> References: <1436918682-4971-1-git-send-email-yuyang.du@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1286 Lines: 41 The load and the util of idle cpus must be updated periodically in order to decay the blocked part. If CONFIG_FAIR_GROUP_SCHED is not set, the load and util of idle cpus are not decayed and stay at the values set before becoming idle. Signed-off-by: Vincent Guittot Reviewed-by: Yuyang Du --- kernel/sched/fair.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 452c932..3e9bccf 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5877,6 +5877,16 @@ static unsigned long task_h_load(struct task_struct *p) #else static inline void update_blocked_averages(int cpu) { + struct rq *rq = cpu_rq(cpu); + struct cfs_rq *cfs_rq = &rq->cfs; + unsigned long flags; + + raw_spin_lock_irqsave(&rq->lock, flags); + update_rq_clock(rq); + + update_cfs_rq_load_avg(cfs_rq_clock_task(cfs_rq), cfs_rq); + + raw_spin_unlock_irqrestore(&rq->lock, flags); } static unsigned long task_h_load(struct task_struct *p) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/