From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752955Ab2LJI3m (ORCPT ); Mon, 10 Dec 2012 03:29:42 -0500 Received: from mga14.intel.com ([143.182.124.37]:14834 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752688Ab2LJI0K (ORCPT ); Mon, 10 Dec 2012 03:26:10 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,250,1355126400"; d="scan'208";a="178808701" From: Alex Shi To: rob@landley.net, mingo@redhat.com, peterz@infradead.org Cc: gregkh@linuxfoundation.org, andre.przywara@amd.com, rjw@sisk.pl, paul.gortmaker@windriver.com, akpm@linux-foundation.org, paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, pjt@google.com, vincent.guittot@linaro.org Subject: [PATCH 03/18] sched: don't need go to smaller sched domain Date: Mon, 10 Dec 2012 16:22:19 +0800 Message-Id: <1355127754-8444-4-git-send-email-alex.shi@intel.com> X-Mailer: git-send-email 1.7.12 In-Reply-To: <1355127754-8444-1-git-send-email-alex.shi@intel.com> References: <1355127754-8444-1-git-send-email-alex.shi@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If parent sched domain has no task allowed cpu find. neither find in it's child. So, go out to save useless checking. Signed-off-by: Alex Shi --- kernel/sched/fair.c | 6 ++---- 1 files changed, 2 insertions(+), 4 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index b40bc2b..05ee54e 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3150,10 +3150,8 @@ select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags) load_idx = sd->wake_idx; group = find_idlest_group(sd, p, cpu, load_idx); - if (!group) { - sd = sd->child; - continue; - } + if (!group) + goto unlock; new_cpu = find_idlest_cpu(group, p, cpu); -- 1.7.5.1