Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932876Ab3DDCCk (ORCPT ); Wed, 3 Apr 2013 22:02:40 -0400 Received: from mga03.intel.com ([143.182.124.21]:29715 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932853Ab3DDCCj (ORCPT ); Wed, 3 Apr 2013 22:02:39 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,404,1363158000"; d="scan'208";a="280534510" From: Alex Shi To: mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, akpm@linux-foundation.org, arjan@linux.intel.com, bp@alien8.de, pjt@google.com, namhyung@kernel.org, efault@gmx.de, morten.rasmussen@arm.com Cc: vincent.guittot@linaro.org, gregkh@linuxfoundation.org, preeti@linux.vnet.ibm.com, viresh.kumar@linaro.org, linux-kernel@vger.kernel.org, alex.shi@intel.com, len.brown@intel.com, rafael.j.wysocki@intel.com, jkosina@suse.cz, clark.williams@gmail.com, tony.luck@intel.com, keescook@chromium.org, mgorman@suse.de, riel@redhat.com Subject: [patch v7 15/21] sched: pull all tasks from source group Date: Thu, 4 Apr 2013 10:00:56 +0800 Message-Id: <1365040862-8390-16-git-send-email-alex.shi@intel.com> X-Mailer: git-send-email 1.7.12 In-Reply-To: <1365040862-8390-1-git-send-email-alex.shi@intel.com> References: <1365040862-8390-1-git-send-email-alex.shi@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1386 Lines: 41 In power balance, we hope some sched groups are fully empty to save CPU power of them. So, we want to move any tasks from them. Signed-off-by: Alex Shi --- kernel/sched/fair.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index f861427..0dd29f4 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5105,7 +5105,9 @@ static struct rq *find_busiest_queue(struct lb_env *env, * When comparing with imbalance, use weighted_cpuload() * which is not scaled with the cpu power. */ - if (capacity && rq->nr_running == 1 && wl > env->imbalance) + if (rq->nr_running == 0 || + (!(env->flags & LBF_POWER_BAL) && capacity && + rq->nr_running == 1 && wl > env->imbalance)) continue; /* @@ -5208,7 +5210,8 @@ redo: ld_moved = 0; lb_iterations = 1; - if (busiest->nr_running > 1) { + if (busiest->nr_running > 1 || + (busiest->nr_running == 1 && env.flags & LBF_POWER_BAL)) { /* * Attempt to move tasks. If find_busiest_group has found * an imbalance but busiest->nr_running <= 1, the group is -- 1.7.12 -- 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/