Received: by 2002:a25:1506:0:0:0:0:0 with SMTP id 6csp5516270ybv; Tue, 11 Feb 2020 17:35:57 -0800 (PST) X-Google-Smtp-Source: APXvYqwjOubXmlspHxXV1M5ORo2BPh7duocQ3S2Hi5233bIEDPiFUQA6KrOPLhL2Bhmn+zhScVWx X-Received: by 2002:aca:d5d3:: with SMTP id m202mr4538616oig.161.1581471357540; Tue, 11 Feb 2020 17:35:57 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1581471357; cv=none; d=google.com; s=arc-20160816; b=FgeEPkUEv+8qmTfijova/ZCA8zA+y7Nx4HUHz/snQqyZ1cYR9myVSDQEPeMt2MBvNE 28Z8ZyRSWK11slIibPFSazM0kMaL/45P+l1WTqNdGluU6UD/7ubLfLPhwu5tY4LL1Y1Z BYRQtvi9w77gqRIAyVYjWhWBeK7RjuKbFWgRj92mWbllpdIsADwBB5q4kdvsU62TbgIJ wHOWd7opMRQWDfptwXjXvq4vaiJYqoYUiy+Hj7skzUJlvUWlokwuwtdqS4YBdnwzqJsa i41Qpb0B4b5Tmc3hKeOmnH2CG02ekHGwdCN8vBdy3e731tawXdztmiYCYL80x3OaVfJ4 TmVQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject; bh=A8NXsYPhgSTkjYusJPvERA1ZDW3yKtBnqcC3A2hH3mU=; b=XkWgYfF3EgzCRmuv5PM7qE1exhw3z3bD1OJhfpn9J2fePDAuG7LupmRRsK7zibzbjf yWkB5Gu2HvkOT7VUBq+Dx8UmMWwOWdIhNYJGFy1zvTQ+dr4PPCEgEYg/g86ystqlcsci vHdzUembMnma6UOL2nUU6zzb/txqEv90FeFh74+EcckG9A4fJEAucFWijNpXitvogkju avN1eNcQ1jxj676ih5UthCWdjTg6QholRWJpH472nJBpohXobYbvznc8lX3w7Cv1ZOhq NYjOIQKausN2A1lquq9IBDu2xNYuT+99XvrSLAryGG6RWx+8uzHWSy7POL0kgXb2hjzc ispA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id n7si2499801oie.95.2020.02.11.17.35.45; Tue, 11 Feb 2020 17:35:57 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728087AbgBLBfW (ORCPT + 99 others); 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 >