From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27690C35242 for ; Wed, 12 Feb 2020 01:35:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0065420724 for ; Wed, 12 Feb 2020 01:35:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728165AbgBLBfW (ORCPT ); Tue, 11 Feb 2020 20:35:22 -0500 Received: from out30-42.freemail.mail.aliyun.com ([115.124.30.42]:42036 "EHLO out30-42.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727865AbgBLBfV (ORCPT ); Tue, 11 Feb 2020 20:35:21 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R111e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e07417;MF=yun.wang@linux.alibaba.com;NM=1;PH=DS;RN=9;SR=0;TI=SMTPD_---0Tpjb1uS_1581471318; Received: from testdeMacBook-Pro.local(mailfrom:yun.wang@linux.alibaba.com fp:SMTPD_---0Tpjb1uS_1581471318) by smtp.aliyun-inc.com(127.0.0.1); Wed, 12 Feb 2020 09:35:19 +0800 Subject: Re: [RFC] why can't dynamic isolation just like the static way To: Steven Rostedt , Peter Zijlstra Cc: Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Ben Segall , Mel Gorman , "open list:SCHEDULER" References: <20200211114350.GJ14914@hirez.programming.kicks-ass.net> <20200211090028.4e12d02e@gandalf.local.home> From: =?UTF-8?B?546L6LSH?= Message-ID: <6b4fda32-b9b0-b8ce-968e-7e5a65a7e1f0@linux.alibaba.com> Date: Wed, 12 Feb 2020 09:35:18 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200211090028.4e12d02e@gandalf.local.home> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020/2/11 δΈ‹εˆ10:00, Steven Rostedt wrote: > On Tue, 11 Feb 2020 12:43:50 +0100 > Peter Zijlstra wrote: > >> On Tue, Feb 11, 2020 at 04:17:34PM +0800, ηŽ‹θ΄‡ wrote: >>> Hi, folks >>> >>> We are dealing with isolcpus these days and try to do the isolation >>> dynamically. >>> >>> The kernel doc lead us into the cpuset.sched_load_balance, it's fine >>> to achieve the dynamic isolation with it, however we got problem with >>> the systemd stuff. >> >> Then don't use systemd :-) Also, if systemd is the problem, why are you >> bugging us? > > [ Background. Peter is someone that doesn't even use systemd. ;-) ] I would be happy to get rid of that too ;-) but seems like it's getting popular now as the basic init stuff, and I guess they have no idea about how they are breaking the dynamic isolation. Regards, Michael Wang > > -- Steve >