Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 1 Dec 2002 07:30:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 1 Dec 2002 07:30:29 -0500 Received: from carlsberg.amagerkollegiet.dk ([194.182.238.3]:36108 "EHLO carlsberg.amagerkollegiet.dk") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Sun, 1 Dec 2002 07:30:28 -0500 Date: Sun, 1 Dec 2002 13:37:49 +0100 (CET) From: =?iso-8859-1?Q?Rasmus_B=F8g_Hansen?= To: Linux Kernel Mailing List Subject: Re: [PROBLEM] NFS trouble - file corruptions In-Reply-To: <1038580372.13625.8.camel@irongate.swansea.linux.org.uk> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=iso-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1713 Lines: 40 On 29 Nov 2002, Alan Cox wrote: > On Fri, 2002-11-29 at 13:17, Rasmus B?g Hansen wrote: > > I just tried turning off DMA on the server disk (this is just a low-end > > IDE-system): No errors in files (compressing the file thrice). > > > > So it does not at all seem to be a NFS-issue! > > > > I have no idea what is wrong. If the disk, cable or IDE controller does > > bit-flipping when DMA is turned on, why is the problem only seen with > > NFS? I have never seem corrupted files or metadata with DMA turned > > (except once long ago, when I experimented with high-transfer-modes - I > > haven't done that since)... > > More likely it changes the timings. There is at least one other > possibility though. With some via bridges using slightly too slow DDR > RAM at a 133MHz clock works reliably _until_ you get a mix of CPU and > DMA traffic. It'll even pass memtest86. I couldn't solve the problem by setting timing parameters... However, the RTL8139-driver is now configured for PIO-mode instead of MMIO-mode (CONFIG_8139TOO_PIO), and I don't see corruptions anymore. Thank you all for your help! /Rasmus -- -- [ Rasmus "M?ffe" B?g Hansen ] --------------------------------------- Life is that property, which a being will lose as a result of falling out of a cold and mysterious cave 30 miles above ground level. - HitchHikers Guide to the Galaxy, Douglas Adams ----------------------------------[ moffe at amagerkollegiet dot dk ] -- - 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/