Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751359AbVJ0R5J (ORCPT ); Thu, 27 Oct 2005 13:57:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751369AbVJ0R5J (ORCPT ); Thu, 27 Oct 2005 13:57:09 -0400 Received: from zproxy.gmail.com ([64.233.162.192]:16877 "EHLO zproxy.gmail.com") by vger.kernel.org with ESMTP id S1751359AbVJ0R5I convert rfc822-to-8bit (ORCPT ); Thu, 27 Oct 2005 13:57:08 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=fOgixm/mLaQOxZQLbIlBn4GI+nFNFopY+9f6+f+wEiYnxCAsK1wY+siT0GWpMR/U+oLMY2fXT9HLO8VPXxh9E22ifv4913qv3QUXtCgORXVjQrs6EjoI8jVR10foIaaYgvUXxEVEuiq4e1E0B2/Ng9fALxm/9zEPco6ahFGGogw= Message-ID: <29495f1d0510271057i42084703gc4a8ffc8ce1f5a21@mail.gmail.com> Date: Thu, 27 Oct 2005 10:57:06 -0700 From: Nish Aravamudan To: Michael Madore Subject: Re: PCI-DMA: high address but no IOMMU Cc: linux-kernel@vger.kernel.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline References: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1124 Lines: 32 On 10/27/05, Michael Madore wrote: > Hi, > > I am seeing the following errors in /var/log/messages when booting > 2.6.14-rc5 on a dual Opteron nforce4 motherboard with 8GB of RAM: > > Checking aperture... > CPU 0: aperture @ be8c000000 size 32 MB > Aperture from northbridge cpu 0 too small (32 MB) > No AGP bridge found > Your BIOS doesn't leave a aperture memory hole > Please enable the IOMMU option in the BIOS setup > This costs you 64 MB of RAM > Mapping aperture over 65536 KB of RAM @ 8000000 > > ... > > PCI-DMA: Disabling AGP. > PCI-DMA: More than 4GB of RAM and no IOMMU > PCI-DMA: 32bit PCI IO may malfunction.<6>PCI-DMA: Disabling IOMMU. I get the same message on my 2-way Opteron machine (ASUS K8N-DL mobo), but I only have 2 GB of RAM :/ Seems odd the PCI-DMA subsystem thinks I have more than 4 :) Anybody have any ideas? Thanks, Nish - 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/