Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759997AbaJ3NTQ (ORCPT ); Thu, 30 Oct 2014 09:19:16 -0400 Received: from casper.infradead.org ([85.118.1.10]:52656 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759961AbaJ3NTO (ORCPT ); Thu, 30 Oct 2014 09:19:14 -0400 Date: Thu, 30 Oct 2014 14:19:04 +0100 From: Peter Zijlstra To: Tejun Heo Cc: Vikas Shivappa , "Auld, Will" , Matt Fleming , Vikas Shivappa , "linux-kernel@vger.kernel.org" , "Fleming, Matt" Subject: Re: Cache Allocation Technology Design Message-ID: <20141030131904.GJ3337@twins.programming.kicks-ass.net> References: <20141029081640.GT3337@twins.programming.kicks-ass.net> <20141029124834.GQ12020@console-pimps.org> <20141029134526.GC3337@twins.programming.kicks-ass.net> <96EC5A4F3149B74492D2D9B9B1602C27349EEB88@ORSMSX105.amr.corp.intel.com> <20141029172845.GP12706@worktop.programming.kicks-ass.net> <20141029182234.GA13393@mtj.dyndns.org> <20141030070725.GG3337@twins.programming.kicks-ass.net> <20141030071424.GE10476@twins.programming.kicks-ass.net> <20141030124440.GB29540@htj.dyndns.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141030124440.GB29540@htj.dyndns.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, Oct 30, 2014 at 08:44:40AM -0400, Tejun Heo wrote: > On Thu, Oct 30, 2014 at 08:14:24AM +0100, Peter Zijlstra wrote: > > On Thu, Oct 30, 2014 at 08:07:25AM +0100, Peter Zijlstra wrote: > > > > and always allow execution of member tasks. > > > > This too btw is not strictly speaking possible for all controllers. Most > > all sched controllers live by the grace of forcing tasks not to run at > > times (eg. the bandwidth controls), falsifying the 'always'. > > Oh sure, the a task just has to run in a foreseeable future, or > rather, a task must not be blocked indefinitely requiring userland > intervention to become executable again. Like the freezer cgroup you mean? ;-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/