From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757083AbeAHMPP (ORCPT + 1 other); Mon, 8 Jan 2018 07:15:15 -0500 Received: from mail-qk0-f171.google.com ([209.85.220.171]:37335 "EHLO mail-qk0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756720AbeAHMPN (ORCPT ); Mon, 8 Jan 2018 07:15:13 -0500 X-Google-Smtp-Source: ACJfBouCc8U9iFIcKbmq7sQUPVj7OilaZ3CQ+Mdw4ooLfCuhP1KaXWbmcqiOmtuE4eNQvxEQcsTRVw== Date: Mon, 8 Jan 2018 04:15:03 -0800 From: Tejun Heo To: "Maciej S. Szmigiero" Cc: Li Zefan , Johannes Weiner , Jonathan Corbet , cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel Subject: Re: [PATCH][RESEND] cgroup, docs: document the root cgroup behavior of cpu and io controllers Message-ID: <20180108121503.GK3668920@devbig577.frc2.facebook.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: Hello, On Thu, Jan 04, 2018 at 10:57:00PM +0100, Maciej S. Szmigiero wrote: > Currently, cgroups v2 documentation contains only a generic remark that > "How resource consumption in the root cgroup is governed is up to each > controller", which isn't really telling users much, who need to dig in the > code and / or commit messages to learn the exact behavior. I don't think we want to fully guarantee the current behavior. On the scheduler side, I don't think it's likely to change but blkio side *might* change. Can you please collect the root behavior in a separte section and clearly note that the behaviors are subject to change? Thanks. -- tejun