From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz@infradead.org>
Subject: Re: [RFC v3 0/5] Add capacity capping support to the CPU controller
Date: Wed, 12 Apr 2017 14:22:15 +0200
Message-ID: <20170412122215.GF3093@worktop>
References: <1488292722-19410-1-git-send-email-patrick.bellasi@arm.com>
 <20170320145131.GA3623@htj.duckdns.org>
 <20170320172233.GA28391@e110439-lin>
 <20170410073622.2y6tnpcd2ssuoztz@hirez.programming.kicks-ass.net>
 <20170411175833.GI29455@e110439-lin>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-path: <linux-pm-owner@vger.kernel.org>
Received: from bombadil.infradead.org ([65.50.211.133]:48154 "EHLO
        bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1751780AbdDLMWX (ORCPT
        <rfc822;linux-pm@vger.kernel.org>); Wed, 12 Apr 2017 08:22:23 -0400
Content-Disposition: inline
In-Reply-To: <20170411175833.GI29455@e110439-lin>
Sender: linux-pm-owner@vger.kernel.org
List-Id: linux-pm@vger.kernel.org
To: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: Tejun Heo <tj@kernel.org>, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Ingo Molnar <mingo@redhat.com>, "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>, Paul Turner <pjt@google.com>, Vincent Guittot <vincent.guittot@linaro.org>, John Stultz <john.stultz@linaro.org>, Todd Kjos <tkjos@android.com>, Tim Murray <timmurray@google.com>, Andres Oportus <andresoportus@google.com>, Joel Fernandes <joelaf@google.com>, Juri Lelli <juri.lelli@arm.com>, Chris Redpath <chris.redpath@arm.com>, Morten Rasmussen <morten.rasmussen@arm.com>, Dietmar Eggemann <dietmar.eggemann@arm.com>

On Tue, Apr 11, 2017 at 06:58:33PM +0100, Patrick Bellasi wrote:
> Sorry, I don't get instead what are the "confusing nesting properties"
> you are referring to?

If a parent group sets min=.2 and max=.8, what are the constraints on
its child groups for setting their resp min and max?

I can't immediately gives rules that would make sense.

For instance, allowing a child to lower min would violate the parent
constraint, while allowing a child to increase min would grant the child
more resources than the parent.

Neither seem like a good thing.