From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1752130AbcFFO1w (ORCPT <rfc822;w@1wt.eu>);
	Mon, 6 Jun 2016 10:27:52 -0400
Received: from bombadil.infradead.org ([198.137.202.9]:41083 "EHLO
	bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1751980AbcFFO1u (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 6 Jun 2016 10:27:50 -0400
Date: Mon, 6 Jun 2016 16:27:43 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>, Yuyang Du <yuyang.du@intel.com>,
        Ingo Molnar <mingo@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Benjamin Segall <bsegall@google.com>, Paul Turner <pjt@google.com>,
        Morten Rasmussen <morten.rasmussen@arm.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>
Subject: Re: [PATCH v4 1/5] sched/fair: Clean up attach_entity_load_avg()
Message-ID: <20160606142743.GF30909@twins.programming.kicks-ass.net>
References: <1465172441-27727-1-git-send-email-yuyang.du@intel.com>
 <1465172441-27727-2-git-send-email-yuyang.du@intel.com>
 <20160606133045.GR2658@codeblueprint.co.uk>
 <CAKfTPtA3bpJw_W6FsA6CULe_yjxX-bzfcuAf15ncQOUdPB187Q@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAKfTPtA3bpJw_W6FsA6CULe_yjxX-bzfcuAf15ncQOUdPB187Q@mail.gmail.com>
User-Agent: Mutt/1.5.23.1 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, Jun 06, 2016 at 03:40:18PM +0200, Vincent Guittot wrote:
> > What about when tasks are moved between groups on CONFIG_SMP=n ?
> > Doesn't this change fail to age the load in that case?
> 
> The load average stuff is only enable for SMP system but it's not used
> for UP system.
> To be honest, I don't know why

We'll likely change that 'soon', because the cpufreq_schedutil thing
also needs these numbers on UP.