From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH] atl1: disable 64bit DMA Date: Mon, 25 Jun 2007 19:17:16 -0400 Message-ID: <46804CFC.4000702@pobox.com> References: <467B12CA.5060405@esuna.co.uk> <467BE118.4090308@redhat.com> <467BE4F1.7040308@esuna.co.uk> <467D0EB0.9030100@esuna.co.uk> <20070624125957.2e27820c@osprey.hogchain.net> <467ED4A8.4080500@esuna.co.uk> <20070624164519.04f215b8@osprey.hogchain.net> <467FB237.2030703@esuna.co.uk> <467FB844.6060702@bellsouth.net> <20070625211855.GA19275@dreamland.darkstar.lan> <46803557.50805@redhat.com> <468038FC.6090302@esuna.co.uk> <46803A40.4070009@redhat.com> <20070625180039.4f083846@osprey.hogchain.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Chris Snook , "Jay L. T. Cornwall" , Luca Tettamanti , linux-kernel@vger.kernel.org, netdev@vger.kernel.org To: Jay Cliburn Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:54994 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751672AbXFYXR1 (ORCPT ); Mon, 25 Jun 2007 19:17:27 -0400 In-Reply-To: <20070625180039.4f083846@osprey.hogchain.net> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Jay Cliburn wrote: > On Mon, 25 Jun 2007 17:57:20 -0400 > Chris Snook wrote: > >> Jay L. T. Cornwall wrote: >>> Chris Snook wrote: >>> >>>> What boards have we seen this on? It's quite possible this is: >>> I can reproduce on an Asus P5K with a Core 2 Duo E6600. >>> >>> lspci identifies the controller as: >>> 02:00.0 Ethernet controller: Attansic Technology Corp. L1 Gigabit >>> Ethernet Adapter (rev b0) >>> >>> dmesg notes the PCI-DMA mapping implementation: >>> PCI-DMA: Using software bounce buffering for IO (SWIOTLB) >>> >> I had a hunch this was on Intel. I'd rather just disable this when >> swiotlb is in use, unless we get more complaints. It's probably >> ultimately a BIOS quirk anyway. > > So far we have reports from both camps: > > Asus M2N8-VMX (AM2): 1 report of lockup > http://sourceforge.net/mailarchive/forum.php?thread_name=46780384.063603.26165%40m12-15.163.com&forum_name=atl1-devel > > Asus P5K (LGA775): 2 reports of lockups > http://sourceforge.net/mailarchive/forum.php?thread_name=467E7E34.4010603%40gmail.com&forum_name=atl1-devel > http://lkml.org/lkml/2007/6/25/107 > > The common denominator in these reports is 4GB RAM. Although its possible this device doesn't really support 64-bit, it's more likely that this is a platform problem of some sort, or a driver bug of some sort. In the driver, maybe it has a problem when you -cross- a 4GB boundary, which is not uncommon. Jeff