Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755284AbZALPYf (ORCPT ); Mon, 12 Jan 2009 10:24:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752484AbZALPYZ (ORCPT ); Mon, 12 Jan 2009 10:24:25 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:47389 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752173AbZALPYZ (ORCPT ); Mon, 12 Jan 2009 10:24:25 -0500 Date: Mon, 12 Jan 2009 16:24:19 +0100 From: Ingo Molnar To: Mike Galbraith Cc: Brian Rogers , linux-kernel@vger.kernel.org, Peter Zijlstra Subject: Re: [BUG] How to get real-time priority using idle priority Message-ID: <20090112152419.GA20003@elte.hu> References: <4969D0D7.2060401@xyzw.org> <1231736941.6003.7.camel@marge.simson.net> <1231765433.5789.35.camel@marge.simson.net> <20090112131406.GB670@elte.hu> <1231773786.10060.0.camel@marge.simson.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1231773786.10060.0.camel@marge.simson.net> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1034 Lines: 26 * Mike Galbraith wrote: > On Mon, 2009-01-12 at 14:14 +0100, Ingo Molnar wrote: > > * Mike Galbraith wrote: > > > > > > I haven't been able to reproduce complete hangs, but with your proggy > > > > adapted to my quad, _and_ the addition of a SCHED_NORMAL hog, I can > > > > reproduce some very bad interactivity, including massive character > > > > repeats while attempting to type, and general "lurchiness" (_bad_ > > > > wakeup latency). I'll poke it with a sharp stick or two. > > > > > > Would you mind trying the below? > > > > i've applied your fix to tip/sched/urgent and merged it into tip/master. > > BTW, I forgot the Reported-by: Brian Rogers :-/ yeah, i noticed that and added it when i committed the change. Ingo -- 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/