From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755579AbbCRXkZ (ORCPT ); Wed, 18 Mar 2015 19:40:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55615 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752212AbbCRXkU (ORCPT ); Wed, 18 Mar 2015 19:40:20 -0400 Message-ID: <550A0CDF.1060709@redhat.com> Date: Wed, 18 Mar 2015 19:40:15 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Tejun Heo CC: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, lizefan@huawei.com, Peter Zijlstra , Clark Williams , Ingo Molnar , Luiz Capitulino , David Rientjes , Mike Galbraith Subject: Re: [PATCH 3/4] cpusets,isolcpus: add file to show isolated cpus in cpuset References: <1425917530-1771-1-git-send-email-riel@redhat.com> <1425917530-1771-4-git-send-email-riel@redhat.com> <20150318164745.GA21564@htj.duckdns.org> In-Reply-To: <20150318164745.GA21564@htj.duckdns.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/18/2015 12:47 PM, Tejun Heo wrote: > On Mon, Mar 09, 2015 at 12:12:09PM -0400, riel@redhat.com wrote: >> From: Rik van Riel >> >> The previous patch makes it so the code skips over isolcpus when >> building scheduler load balancing domains. This makes it hard to >> see for a user which of the CPUs in a cpuset are participating in >> load balancing, and which ones are isolated cpus. >> >> Add a cpuset.isolcpus file with info on which cpus in a cpuset are >> isolated CPUs. >> >> This file is read-only for now. In the future we could extend things >> so isolcpus can be changed at run time, for the root (system wide) >> cpuset only. > > Didn't Li say that this is trivially computable from userland? I'm > not sure this knob actually belongs to cpuset. I don't know whether the information to compute this is always visible from userland. I am happy to drop this patch if Li prefers things that way, though. Li? -- All rights reversed