From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755451Ab3AEIh1 (ORCPT ); Sat, 5 Jan 2013 03:37:27 -0500 Received: from mga11.intel.com ([192.55.52.93]:44979 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755323Ab3AEIhN (ORCPT ); Sat, 5 Jan 2013 03:37:13 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,415,1355126400"; d="scan'208";a="270210057" 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 Cc: vincent.guittot@linaro.org, gregkh@linuxfoundation.org, preeti@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, alex.shi@intel.com Subject: [PATCH v3 04/22] sched: don't need go to smaller sched domain Date: Sat, 5 Jan 2013 16:37:33 +0800 Message-Id: <1357375071-11793-5-git-send-email-alex.shi@intel.com> X-Mailer: git-send-email 1.7.12 In-Reply-To: <1357375071-11793-1-git-send-email-alex.shi@intel.com> References: <1357375071-11793-1-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 file changed, 2 insertions(+), 4 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 3c7b09a..ecfbf8e 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3378,10 +3378,8 @@ 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); -- 1.7.12