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 S1758270AbcIMNaS (ORCPT <rfc822;w@1wt.eu>);
        Tue, 13 Sep 2016 09:30:18 -0400
Received: from Galois.linutronix.de ([146.0.238.70]:58795 "EHLO
        Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1756637AbcIMNaN (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 13 Sep 2016 09:30:13 -0400
Date: Tue, 13 Sep 2016 15:27:14 +0200 (CEST)
From: Thomas Gleixner <tglx@linutronix.de>
To: Shaohua Li <shli@fb.com>
cc: "Yu, Fenghua" <fenghua.yu@intel.com>,
        "Luck, Tony" <tony.luck@intel.com>,
        "Anvin, H Peter" <h.peter.anvin@intel.com>,
        Ingo Molnar <mingo@elte.hu>, Peter Zijlstra <peterz@infradead.org>,
        Tejun Heo <tj@kernel.org>, Borislav Petkov <bp@suse.de>,
        Stephane Eranian <eranian@google.com>,
        Marcelo Tosatti <mtosatti@redhat.com>,
        David Carrillo-Cisneros <davidcc@google.com>,
        "Shankar, Ravi V" <ravi.v.shankar@intel.com>,
        Vikas Shivappa <vikas.shivappa@linux.intel.com>,
        "Prakhya, Sai Praneeth" <sai.praneeth.prakhya@intel.com>,
        linux-kernel <linux-kernel@vger.kernel.org>, x86 <x86@kernel.org>
Subject: Re: [PATCH v2 06/33] Documentation, x86: Documentation for Intel
 resource allocation user interface
In-Reply-To: <20160912041539.GA56347@csimstu-mbp.local.dhcp.thefacebook.com>
Message-ID: <alpine.DEB.2.20.1609131525060.6233@nanos>
References: <1473328647-33116-7-git-send-email-fenghua.yu@intel.com> <20160908220119.GA64153@shli-mbp.local> <20160909011746.GA42229@linux.intel.com> <20160908224513.GA67943@shli-mbp.local> <20160909072245.GC42229@linux.intel.com> <20160909175051.GA75693@shli-mbp.local>
 <3908561D78D1C84285E8C5FCA982C28F3A1C48F1@ORSMSX114.amr.corp.intel.com> <20160909214325.GA81860@shli-mbp.local> <3908561D78D1C84285E8C5FCA982C28F3A1C4DE1@ORSMSX114.amr.corp.intel.com> <3E5A0FA7E9CA944F9D5414FEC6C712205DFEE583@ORSMSX106.amr.corp.intel.com>
 <20160912041539.GA56347@csimstu-mbp.local.dhcp.thefacebook.com>
User-Agent: Alpine 2.20 (DEB 67 2015-01-07)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Sun, 11 Sep 2016, Shaohua Li wrote:
> On Sat, Sep 10, 2016 at 12:36:57AM +0000, Yu, Fenghua wrote:
> > One way to implement this is we can extend the current interface to accept
> > a resctrl file system mount parameter to switch b/w "procs" and "tasks" during
> > mount time. So the file sytem has either "procs" or "tasks" during run time. I don't think it's right to have both of them at the same time in the file system.
> 
> A mount option doesn't make sense, which just creates more trouble. What's
> wrong to have both of 'procs' and 'tasks' at the same time, like cgroup? I
> think it's more natural to support both. As for the content of 'procs' and
> 'tasks', we could follow how cgroup handle them.

Right. There is nothing wrong with having both, but the very first step is
to get the basic infrastructure merged. Adding 'procs' is a straight
forward add on which can be implemented on top of the primary patch
set. There is no design change required to support it later.

Thanks,

	tglx