Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270301AbTGRSbW (ORCPT ); Fri, 18 Jul 2003 14:31:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270292AbTGRSbV (ORCPT ); Fri, 18 Jul 2003 14:31:21 -0400 Received: from pop.gmx.net ([213.165.64.20]:42171 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S270302AbTGRSbL (ORCPT ); Fri, 18 Jul 2003 14:31:11 -0400 Message-Id: <5.2.1.1.2.20030718202746.01af5828@pop.gmx.net> X-Mailer: QUALCOMM Windows Eudora Version 5.2.1 Date: Fri, 18 Jul 2003 20:49:45 +0200 To: Davide Libenzi From: Mike Galbraith Subject: Re: [PATCH] O6int for interactivity Cc: Wiktor Wodecki , Nick Piggin , Con Kolivas , linux kernel mailing list , Andrew Morton , Felipe Alfaro Solana , Zwane Mwaikambo In-Reply-To: References: <5.2.1.1.2.20030718174433.01b12878@pop.gmx.net> <5.2.1.1.2.20030718120229.01a8fcf0@pop.gmx.net> <5.2.1.1.2.20030718071656.01af84d0@pop.gmx.net> <200307170030.25934.kernel@kolivas.org> <200307170030.25934.kernel@kolivas.org> <5.2.1.1.2.20030718071656.01af84d0@pop.gmx.net> <5.2.1.1.2.20030718120229.01a8fcf0@pop.gmx.net> <5.2.1.1.2.20030718174433.01b12878@pop.gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1076 Lines: 25 At 09:52 AM 7/18/2003 -0700, Davide Libenzi wrote: >On Fri, 18 Jul 2003, Mike Galbraith wrote: > > > Telling to not mess with my kernel threads seems to have fixed it here... > > no stalls during the whole contest run. New contest numbers attached. > >It is ok to use unfairness towards kernel threads to avoid starvation. We >control them. It is right to apply uncontrolled unfairness to userspace >tasks though. In this case, it appears that the lowered priority was causing trouble. One test run isn't enough to say 100%, but what I read out of the numbers is that at least kswapd needs to be able to preempt. wrt the uncontrolled unfairness, I've muttered about this before. I've also tried (quite) a few things, but nothing yet has been good enough to... require trashing that I couldn't do here ;-) -Mike - 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/