From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755492AbbCBQJK (ORCPT ); Mon, 2 Mar 2015 11:09:10 -0500 Received: from mail-qa0-f54.google.com ([209.85.216.54]:54345 "EHLO mail-qa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753997AbbCBQJH (ORCPT ); Mon, 2 Mar 2015 11:09:07 -0500 Date: Mon, 2 Mar 2015 11:09:03 -0500 From: Tejun Heo To: Mike Galbraith Cc: Peter Zijlstra , Rik van Riel , Zefan Li , linux-kernel@vger.kernel.org, Clark Williams , Ingo Molnar , Luiz Capitulino , David Rientjes , cgroups@vger.kernel.org Subject: Re: [PATCH v4 2/2] cpusets,isolcpus: add file to show isolated cpus in cpuset Message-ID: <20150302160903.GE17694@htj.duckdns.org> References: <1424882288-2910-1-git-send-email-riel@redhat.com> <1424882288-2910-3-git-send-email-riel@redhat.com> <54EEFE15.3010005@huawei.com> <20150226121231.6fcba7e8@annuminas.surriel.com> <20150302090933.GH21418@twins.programming.kicks-ass.net> <1425300290.5863.17.camel@gmail.com> <20150302152924.GD17694@htj.duckdns.org> <1425312177.12094.15.camel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1425312177.12094.15.camel@gmail.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 02, 2015 at 05:02:57PM +0100, Mike Galbraith wrote: > Well, those are the only ones we can do anything about. Dirt simple > diddling of the workqueue default mask as sched domains are > added/removed should do it I think. Automatically moving any existing > unbound worker away from isolated cores at the same time would be a > bonus, most important is that no new threads sneak in. Worker pools are immutable once created and configuraiton changes are achieved by creating new pools and draining old ones but at any rate making it follow config changes is almost trivial. Figuring out configuration policy might take a bit of effort tho. Can you point me to what specific configuration it should be following? Thanks. -- tejun