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 8C886C35242 for ; Wed, 12 Feb 2020 01:30:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6174B20724 for ; Wed, 12 Feb 2020 01:30:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728103AbgBLBaI (ORCPT ); Tue, 11 Feb 2020 20:30:08 -0500 Received: from out30-43.freemail.mail.aliyun.com ([115.124.30.43]:37913 "EHLO out30-43.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727330AbgBLBaI (ORCPT ); Tue, 11 Feb 2020 20:30:08 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R791e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=yun.wang@linux.alibaba.com;NM=1;PH=DS;RN=9;SR=0;TI=SMTPD_---0TpjeQz9_1581471003; Received: from testdeMacBook-Pro.local(mailfrom:yun.wang@linux.alibaba.com fp:SMTPD_---0TpjeQz9_1581471003) by smtp.aliyun-inc.com(127.0.0.1); Wed, 12 Feb 2020 09:30:04 +0800 Subject: Re: [RFC] why can't dynamic isolation just like the static way To: Peter Zijlstra Cc: Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , "open list:SCHEDULER" References: <20200211114350.GJ14914@hirez.programming.kicks-ass.net> From: =?UTF-8?B?546L6LSH?= Message-ID: <4800c9fd-2fbd-df35-cfa9-c048f9fe8b11@linux.alibaba.com> Date: Wed, 12 Feb 2020 09:30:03 +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: <20200211114350.GJ14914@hirez.programming.kicks-ass.net> 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ˆ7:43, 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? Well, that's... fair enough :-P What we try to understand is why dynamic isolation is so different with the way of static isolation, is it not good to have a simple way instead? Regards, Michael Wang >