From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932267AbXCVNlS (ORCPT ); Thu, 22 Mar 2007 09:41:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932203AbXCVNlS (ORCPT ); Thu, 22 Mar 2007 09:41:18 -0400 Received: from dla107.neoplus.adsl.tpnet.pl ([83.24.30.107]:55140 "EHLO dla107.neoplus.adsl.tpnet.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932201AbXCVNlR (ORCPT ); Thu, 22 Mar 2007 09:41:17 -0400 X-Greylist: delayed 379 seconds by postgrey-1.27 at vger.kernel.org; Thu, 22 Mar 2007 09:41:16 EDT Message-ID: <460285FF.40408@o2.pl> Date: Thu, 22 Mar 2007 14:34:55 +0100 From: Artur Skawina User-Agent: Thunderbird 3.0a1 (X11/20070320) MIME-Version: 1.0 To: Con Kolivas CC: Jeffrey Hundstad , linux list , ck list , Ingo Molnar , Andrew Morton Subject: Re: [PATCH] sched: rsdl check for niced tasks lowering prio level References: <200703220429.45311.kernel@kolivas.org> <200703221124.59126.kernel@kolivas.org> <200703221152.45141.kernel@kolivas.org> <200703221304.58011.kernel@kolivas.org> In-Reply-To: <200703221304.58011.kernel@kolivas.org> X-Enigmail-Version: 0.95b Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Con Kolivas wrote: > Here is the best fix for the bug pointed out. Thanks. > Ensure niced tasks are not inappropriately limiting sleeping unniced tasks > by explicitly checking what the best static priority that has run this > major rotation was. yes, this made the machine usable again. After noticing that the context switch rate during a "nice -19 make -j2" has now been halved vs stock 2.6.20, compiled a kernel under both and RSDL w/these two patches was 2% faster; so this may be the right direction after all :) artur