Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754906AbYH2IGf (ORCPT ); Fri, 29 Aug 2008 04:06:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752584AbYH2IGS (ORCPT ); Fri, 29 Aug 2008 04:06:18 -0400 Received: from viefep18-int.chello.at ([213.46.255.22]:53833 "EHLO viefep19-int.chello.at" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752394AbYH2IGO (ORCPT ); Fri, 29 Aug 2008 04:06:14 -0400 X-SourceIP: 80.57.229.25 Subject: Re: [PATCH 6/6] sched: disabled rt-bandwidth by default From: Peter Zijlstra To: Mike Galbraith Cc: Steven Rostedt , Linus Torvalds , Mark Hounschell , Nick Piggin , Ingo Molnar , LKML , Stefani Seibold , Dario Faggioli , Max Krasnyansky , Thomas Gleixner , Andrew Morton In-Reply-To: <1219996607.5079.142.camel@marge.simson.net> References: <20080819103301.787700742@chello.nl> <200808290036.35817.nickpiggin@yahoo.com.au> <200808290134.35093.nickpiggin@yahoo.com.au> <48B6EB6F.2050802@compro.net> <1219996607.5079.142.camel@marge.simson.net> Content-Type: text/plain Date: Fri, 29 Aug 2008 10:06:05 +0200 Message-Id: <1219997165.17355.42.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1103 Lines: 24 On Fri, 2008-08-29 at 09:56 +0200, Mike Galbraith wrote: > On Thu, 2008-08-28 at 14:53 -0400, Steven Rostedt wrote: > > On Thu, 28 Aug 2008, Linus Torvalds wrote: > > > > > > And I'm not really interested. Quite frankly, I suspect the "we want to > > > run something like pulseaudio with RT priorities" camp is the more common > > > one, and in that context I understand limiting SCHED_FIFO sounds perfectly > > > understandable. > > > > The fact that it actually limits a SCHED_FIFO task group, over a single > > task thread does bother me a little. > > It bothers me some too. You have to patch/re-compile the kernel if you > need to turn it off and don't have SCHED_DEBUG enabled (not free). /proc/sys/kernel/sched_rt_{runtime,period}_us don't require SCHED_DEBUG. If they are in any way non-functional on SCHED_DEBUG=n then that's a clear bug. -- 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/