From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753474AbYHRTwZ (ORCPT ); Mon, 18 Aug 2008 15:52:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932814AbYHRTrF (ORCPT ); Mon, 18 Aug 2008 15:47:05 -0400 Received: from casper.infradead.org ([85.118.1.10]:55813 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759077AbYHRTrC (ORCPT ); Mon, 18 Aug 2008 15:47:02 -0400 Subject: Re: SCHED_FIFO and SCHED_RR broken by cfs From: Peter Zijlstra To: Max Krasnyansky Cc: Nick Piggin , "Torvalds, Linus" , Stefani Seibold , linux-kernel@vger.kernel.org, mingo@redhat.com In-Reply-To: <48A9B906.7090201@qualcomm.com> References: <1218880552.11912.9.camel@matrix> <200808182124.17359.nickpiggin@yahoo.com.au> <1219060315.10800.338.camel@twins> <200808182214.08942.nickpiggin@yahoo.com.au> <48A9B906.7090201@qualcomm.com> Content-Type: text/plain Date: Mon, 18 Aug 2008 21:46:15 +0200 Message-Id: <1219088775.10800.355.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 On Mon, 2008-08-18 at 11:01 -0700, Max Krasnyansky wrote: > Just wanted to mention that I'm with Nick on this one. I pointed this > (ie POSIX breakage) out as soon as the change went in. I do have a valid > (which some people disagree with ;-)) workload that uses 100% of the > CPU. So my unit-tests caught this right away. > > Anyway, "RT bandwidth throttling" has been in and enabled be default > since 2.6.25. So I'm not sure if it makes sense to revert the default at > this point. Already working on a patches to make it so.. The patch to change the default is simple enough - but I spotted a few other bugs while poking at the issue Dario pointed out.