From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757397AbcDGTbf (ORCPT ); Thu, 7 Apr 2016 15:31:35 -0400 Received: from casper.infradead.org ([85.118.1.10]:47750 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755466AbcDGTbd (ORCPT ); Thu, 7 Apr 2016 15:31:33 -0400 Date: Thu, 7 Apr 2016 21:31:27 +0200 From: Peter Zijlstra To: Johannes Weiner Cc: Tejun Heo , torvalds@linux-foundation.org, akpm@linux-foundation.org, mingo@redhat.com, lizefan@huawei.com, pjt@google.com, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-api@vger.kernel.org, kernel-team@fb.com Subject: Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource group and PRIO_RGRP Message-ID: <20160407193127.GB3448@twins.programming.kicks-ass.net> References: <1457710888-31182-1-git-send-email-tj@kernel.org> <20160314113013.GM6344@twins.programming.kicks-ass.net> <20160406155830.GI24661@htj.duckdns.org> <20160407064549.GH3430@twins.programming.kicks-ass.net> <20160407073547.GA12560@cmpxchg.org> <20160407082810.GN3430@twins.programming.kicks-ass.net> <20160407190424.GA20407@cmpxchg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160407190424.GA20407@cmpxchg.org> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 07, 2016 at 03:04:24PM -0400, Johannes Weiner wrote: > All this means here is that if you want to change the shares allocated > to the tasks in R (or then L) you have to be explicit about it and > update the weight configuration in L. Updating the weight of L for every task spawned and killed is simply not an option. The fact that you're not willing to admit to this is troubling, but does confirm I can stop spending time on anything cgroup v2. cpu-cgroup just isn't going to move to this inferior interface. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource group and PRIO_RGRP Date: Thu, 7 Apr 2016 21:31:27 +0200 Message-ID: <20160407193127.GB3448@twins.programming.kicks-ass.net> References: <1457710888-31182-1-git-send-email-tj@kernel.org> <20160314113013.GM6344@twins.programming.kicks-ass.net> <20160406155830.GI24661@htj.duckdns.org> <20160407064549.GH3430@twins.programming.kicks-ass.net> <20160407073547.GA12560@cmpxchg.org> <20160407082810.GN3430@twins.programming.kicks-ass.net> <20160407190424.GA20407@cmpxchg.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20160407190424.GA20407-druUgvl0LCNAfugRpC6u6w@public.gmane.org> Sender: cgroups-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Johannes Weiner Cc: Tejun Heo , torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org, pjt-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kernel-team-b10kYP2dOMg@public.gmane.org List-Id: linux-api@vger.kernel.org On Thu, Apr 07, 2016 at 03:04:24PM -0400, Johannes Weiner wrote: > All this means here is that if you want to change the shares allocated > to the tasks in R (or then L) you have to be explicit about it and > update the weight configuration in L. Updating the weight of L for every task spawned and killed is simply not an option. The fact that you're not willing to admit to this is troubling, but does confirm I can stop spending time on anything cgroup v2. cpu-cgroup just isn't going to move to this inferior interface.