Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266825AbUIIUPI (ORCPT ); Thu, 9 Sep 2004 16:15:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267565AbUIIUOb (ORCPT ); Thu, 9 Sep 2004 16:14:31 -0400 Received: from the-village.bc.nu ([81.2.110.252]:46507 "EHLO localhost.localdomain") by vger.kernel.org with ESMTP id S264997AbUIIUNJ (ORCPT ); Thu, 9 Sep 2004 16:13:09 -0400 Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-R1 From: Alan Cox To: Ingo Molnar Cc: Mark_H_Johnson@raytheon.com, Lee Revell , Free Ekanayaka , Eric St-Laurent , Linux Kernel Mailing List , "K.R. Foley" , Felipe Alfaro Solana , Daniel Schmitt , "P.O. Gaillard" , nando@ccrma.stanford.edu, luke@audioslack.com, free78@tin.it In-Reply-To: <20040909194737.GA2778@elte.hu> References: <20040909194737.GA2778@elte.hu> Content-Type: text/plain Content-Transfer-Encoding: 7bit Message-Id: <1094756507.14657.64.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 (1.4.6-2) Date: Thu, 09 Sep 2004 20:02:00 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1130 Lines: 25 On Iau, 2004-09-09 at 20:47, Ingo Molnar wrote: > there are also tools that tweak chipsets directly - powertweak and the > PCI latency settings. Maybe something tweaks the IDE controller just the > right way. Also, try disabling specific controller support in the > .config (or turn it on) - by chance the generic IDE code could program > the IDE controller in a way that generates nicer DMA. Do not tweak your IDE controller pci latency without making a backup if its anything but the base motherboard chipset. Not unless you make backups first and test it very hard. Its a particularly popular area for errata. You could also try lower DMA modes, I don't know if that will help or not but UDMA133 is essentially "one entire PCI 32/33Mhz bus worth of traffic so the effects are not too suprising. IDE control ports can give you long stalls too especially if IORDY is in use. Alan - 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/