Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932069AbVJ3O3X (ORCPT ); Sun, 30 Oct 2005 09:29:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932087AbVJ3O3X (ORCPT ); Sun, 30 Oct 2005 09:29:23 -0500 Received: from e4.ny.us.ibm.com ([32.97.182.144]:59817 "EHLO e4.ny.us.ibm.com") by vger.kernel.org with ESMTP id S932069AbVJ3O3W (ORCPT ); Sun, 30 Oct 2005 09:29:22 -0500 Date: Sun, 30 Oct 2005 06:29:24 -0800 From: Nishanth Aravamudan To: Michael Madore Cc: Andi Kleen , linux-kernel@vger.kernel.org Subject: Re: PCI-DMA: high address but no IOMMU Message-ID: <20051030142924.GA30183@us.ibm.com> References: <20051028015900.GB4141@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051028015900.GB4141@us.ibm.com> X-Operating-System: Linux 2.6.14 (x86_64) User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1637 Lines: 51 On 27.10.2005 [18:59:00 -0700], Nishanth Aravamudan wrote: > On 27.10.2005 [15:39:20 -0700], Michael Madore wrote: > > On 28 Oct 2005 00:16:51 +0200, Andi Kleen wro> > > > > > Checking aperture... > > > > CPU 0: aperture @ 8000000 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: aperture base @ 8000000 size 65536 KB > > > > PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture > > > > > > Can you post the full boot log? > > > > > > > Hi Andy, > > > > Here is the full boot log from 2.6.14-rc5. > > Just as another datapoint, here is mine (ignore the inode issues, they > are due to a power failure yesterday): Ah, silly me, I set IOMMU_DEBUG to Y at some point without realizing. Taking that away removed the issues and I now only get: [ 0.000000] Checking aperture... [ 0.000000] CPU 0: aperture @ 4000000 size 32 MB [ 0.000000] Aperture from northbridge cpu 0 too small (32 MB) [ 0.000000] No AGP bridge found ... [ 47.737770] PCI-DMA: Disabling IOMMU. Which makes a lot more sense. Sorry for the noise. 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/