From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751242AbdFAUPj (ORCPT ); Thu, 1 Jun 2017 16:15:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58286 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751041AbdFAUPh (ORCPT ); Thu, 1 Jun 2017 16:15:37 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 8F3407E9CA Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=longman@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 8F3407E9CA Subject: Re: [RFC PATCH v2 11/17] cgroup: Implement new thread mode semantics To: Peter Zijlstra , Tejun Heo References: <1494855256-12558-1-git-send-email-longman@redhat.com> <1494855256-12558-12-git-send-email-longman@redhat.com> <20170519202624.GA15279@wtj.duckdns.org> <20170524203616.GO24798@htj.duckdns.org> <9b147a7e-fec3-3b78-7587-3890efcd42f2@redhat.com> <20170524212745.GP24798@htj.duckdns.org> <20170601145042.GA3494@htj.duckdns.org> <20170601151045.xhsv7jauejjis3mi@hirez.programming.kicks-ass.net> Cc: Li Zefan , Johannes Weiner , Ingo Molnar , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, kernel-team@fb.com, pjt@google.com, luto@amacapital.net, efault@gmx.de From: Waiman Long Organization: Red Hat Message-ID: <732a13ba-517d-c7d3-56a3-c34b51a8f6fd@redhat.com> Date: Thu, 1 Jun 2017 16:15:34 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <20170601151045.xhsv7jauejjis3mi@hirez.programming.kicks-ass.net> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Thu, 01 Jun 2017 20:15:37 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/01/2017 11:10 AM, Peter Zijlstra wrote: > On Thu, Jun 01, 2017 at 10:50:42AM -0400, Tejun Heo wrote: >> Hello, Waiman. >> >> A short update. I tried making root special while keeping the >> existing threaded semantics but I didn't really like it because we >> have to couple controller enables/disables with threaded >> enables/disables. I'm now trying a simpler, albeit a bit more >> tedious, approach which should leave things mostly symmetrical. I'm >> hoping to be able to post mostly working patches this week. > I've not had time to look at any of this. But the question I'm most > curious about is how cgroup-v2 preserves the container invariant. If you don't have much time to look at the patch, I will suggest just looking at the cover letter as well as changes to the cgroup-v2.txt file. You will get a pretty good overview of what this patchset is about. Cheers, Longman