From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266075AbUHHSJ0 (ORCPT ); Sun, 8 Aug 2004 14:09:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266096AbUHHSJ0 (ORCPT ); Sun, 8 Aug 2004 14:09:26 -0400 Received: from av9-1-sn3.vrr.skanova.net ([81.228.9.185]:10706 "EHLO av9-1-sn3.vrr.skanova.net") by vger.kernel.org with ESMTP id S266075AbUHHSJU (ORCPT ); Sun, 8 Aug 2004 14:09:20 -0400 Subject: Re: dma problems with Serverworks CSB5 chipset From: =?ISO-8859-1?Q?Torbj=F6rn?= Olander To: Alan Cox Cc: linux-kernel@vger.kernel.org In-Reply-To: <1091554289.3898.5.camel@localhost.localdomain> References: <4107E4B3.6070904@watson.wustl.edu> <20040803180821.GB6265@logos.cnet> <1091554289.3898.5.camel@localhost.localdomain> Content-Type: text/plain; charset=ISO-8859-1 Message-Id: <1091988557.769.18.camel@iota> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Sun, 08 Aug 2004 20:09:17 +0200 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I'm having the same problems here with linux 2.6.8-rc2 kernel here with an Intel SAI2 dual SMP P3 motherboard with Serverworks Serverset III LE chipset and CSB5 southbridge. I run one WDC WD400BB-00DEA0 as master on each channel with SW RAID1 for system. To even get DMA working I had to add append="ide0=ata66 ide1=ata66" in my lilo config. The system works fine with low load on the disks, but if I copy greater amounts of data from a local SW RAID5 array I get the same DMA timeout error and often it locks up completely. If i disable DMA with hdparm the system works fine. /proc/ide/svwks output: (DMA disabled with hdparm) ServerWorks OSB4/CSB5/CSB6 ServerWorks CSB5 Chipset (rev 93) ------------------------------- General Status --------------------------------- --------------- Primary Channel ---------------- Secondary Channel ------------- enabled enabled --------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------ DMA enabled: no no no no UDMA enabled: yes no yes no UDMA enabled: 2 0 2 0 DMA enabled: 2 2 2 2 PIO enabled: 4 0 4 0 On Tue, 2004-08-03 at 19:31, Alan Cox wrote: > On Maw, 2004-08-03 at 19:08, Marcelo Tosatti wrote: > > ServerWorks OSB4/5 chipsets are known to not work reliably with the Linux > > IDE code. AFAIK its a hardware problem which we dont correctly work around. > > > > Have you tried disabling DMA? > > > > Bart and Alan are IDE experts, they can probably give you more useful > > information. > > CSB5 is reliable, rock solidly so in my experience. OSB4 was the older > interface with problems. Are these systems SMP, what disks are you using > and in what IDE mode ? > > - > 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/ -- Med vänliga hälsningar / Best regards Torbjörn Olander tosse@wlug.westbo.se