From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: skge: PCI error cmd=0x117 status=0x22b0 Date: Fri, 14 Nov 2008 10:06:23 -0800 Message-ID: <20081114100623.7287d9ec@extreme> References: <20081114153646.GB7172@fi.muni.cz> <20081114084209.0ee411fd@extreme> <20081114175507.GC7172@fi.muni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Jan Kasprzak Return-path: Received: from mail.vyatta.com ([76.74.103.46]:54933 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754326AbYKNSG2 (ORCPT ); Fri, 14 Nov 2008 13:06:28 -0500 In-Reply-To: <20081114175507.GC7172@fi.muni.cz> Sender: netdev-owner@vger.kernel.org List-ID: On Fri, 14 Nov 2008 18:55:07 +0100 Jan Kasprzak wrote: > Stephen Hemminger wrote: > : On Fri, 14 Nov 2008 16:36:46 +0100 > : Jan Kasprzak wrote: > : > : > Hello, > : > > : > I have an ASUS M2R32-MVP board with the skge network card. From time to time > : > the network freezes with the following message (this one taken from > : > 2.6.27-rc7, another one added even with timing information at the end > : > of this mail): > : > > : > skge 0000:03:04.0: PCI error cmd=0x117 status=0x22b0 > : > skge 0000:03:04.0: unable to clear error (so ignoring them) > : > : The device is getting a PCI master abort on a DMA. > : Either, you have hardware issues, or there is a driver bug when accessing > : a particular memory address. Do you have 4G or more of memory? > > Yes (I have written it in my previous mail) - I have 8 GB of RAM. > Can - for example - a non-linear memory (i.e. the memory hole remapping) > be a problem? IIRC, I have it set to "on" in my BIOS setup. > > : Some motherboards are crap and don't actually allow DMA from high memory. > > With 8 GB only half of my RAM is below the 32-bit barrier, > so I guess if this was a problem, I would got this error more often > (every second packet on average?). > > OK, I will try to poke my HW vendor. Thanks, > > -Yenya > You could also try adjustments of iommu on kernel command line (force, off, soft, etc). Andi Kleen might no more about this.