Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 30 Jan 2002 08:21:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 30 Jan 2002 08:21:25 -0500 Received: from [62.245.135.174] ([62.245.135.174]:38336 "EHLO mail.teraport.de") by vger.kernel.org with ESMTP id ; Wed, 30 Jan 2002 08:21:20 -0500 Message-ID: <3C57F347.26527F73@TeraPort.de> Date: Wed, 30 Jan 2002 14:21:11 +0100 From: Martin Knoblauch Reply-To: m.knoblauch@TeraPort.de Organization: TeraPort GmbH X-Mailer: Mozilla 4.78 [en] (X11; U; Linux 2.4.18-pre4-J0-VM-22-preempt-lock i686) X-Accept-Language: en, de MIME-Version: 1.0 To: jfv@trane.bluesong.net CC: "linux-kernel@vger.kernel.org" Subject: Re: [PATCH]: O(1) 2.4.17-J7 Tuneable Parameters X-MIMETrack: Itemize by SMTP Server on lotus/Teraport/de(Release 5.0.7 |March 21, 2001) at 01/30/2002 02:21:10 PM, Serialize by Router on lotus/Teraport/de(Release 5.0.7 |March 21, 2001) at 01/30/2002 02:21:20 PM, Serialize complete at 01/30/2002 02:21:20 PM Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > [PATCH]: O(1) 2.4.17-J7 Tuneable Parameters > > > Hi Ingo, > > This patch synchronizes with J7 and I think makes the changes > you wished. A couple of important points: > > - This patch can be applied to EITHER 2.4.17 OR 2.4.18 pre 7 as > long as Ingo's J7 patch is applied first. > > - While I agree with you on not wanting these in the mainline kernel, > I ran Hackbench on one of our new Foster systems with and > without the tuneable parameters, and while the numbers do > degrade slightly, its rather suprisingly small. So dont be afraid > to use this as a system tuning aid. > How big is the actual degradation in your test? IIR, Ingo is afraid that the tunables could easily screw things up, which of course is true. What about adding a kernel-build option that leaves the sysctl interface read-only by default and enables writing only if it is requested at build time? That way the external interface stays constant. Martin -- ------------------------------------------------------------------ Martin Knoblauch | email: Martin.Knoblauch@TeraPort.de TeraPort GmbH | Phone: +49-89-510857-309 C+ITS | Fax: +49-89-510857-111 http://www.teraport.de | Mobile: +49-170-4904759 - 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/