From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751045AbVIWOs6 (ORCPT ); Fri, 23 Sep 2005 10:48:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751049AbVIWOs6 (ORCPT ); Fri, 23 Sep 2005 10:48:58 -0400 Received: from cantor2.suse.de ([195.135.220.15]:4244 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S1751045AbVIWOs6 (ORCPT ); Fri, 23 Sep 2005 10:48:58 -0400 From: Andi Kleen To: Chuck Ebbert <76306.1226@compuserve.com>, linux-kernel Subject: Re: x86-64: Why minimum 64MB aperture? Date: Fri, 23 Sep 2005 16:49:07 +0200 User-Agent: KMail/1.8 References: <200509230410_MC3-1-AAFB-6FC6@compuserve.com> In-Reply-To: <200509230410_MC3-1-AAFB-6FC6@compuserve.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200509231649.07354.ak@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Friday 23 September 2005 10:07, you wrote: > I get this when I boot: > > Checking aperture... > CPU 0: aperture @ 23a8000000 size 32 MB > Aperture from northbridge cpu 0 too small (32 MB) > > > arch/x86_64/aperture.c says this when aperture is < 64MB. > > I have no way of changing this in my BIOS. The systems shares video memory > with RAM. All I can change is the amount of RAM allocated for video (32, > 64 or 128 MB, currently set to 64.) 32MB is too small for IOMMU use. Linux will fix it up for you. -Andi