From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751381AbVJREOQ (ORCPT ); Tue, 18 Oct 2005 00:14:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751415AbVJREOQ (ORCPT ); Tue, 18 Oct 2005 00:14:16 -0400 Received: from xproxy.gmail.com ([66.249.82.197]:57706 "EHLO xproxy.gmail.com") by vger.kernel.org with ESMTP id S1751381AbVJREOP convert rfc822-to-8bit (ORCPT ); Tue, 18 Oct 2005 00:14:15 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=TKdtuA0OsGNaFQ2p0d3G9pxDHQaK20U7SWjYapLGmuR6PaPgkZlfwsLND7NhdyD/TqvUmVUK99vYnoyFDh1540oU9ZGQ6lL4yJvgnW+Jr9e10cPhNEo9JblB9TkR9EZbS6Pg8/KSqbiX6B52uv5hMExZDlIZXxluVnYboj/6PXI= Message-ID: <5bdc1c8b0510172114h38bd62bcsd4cedd275ea50959@mail.gmail.com> Date: Mon, 17 Oct 2005 21:14:14 -0700 From: Mark Knecht To: linux-kernel@vger.kernel.org Subject: 2.6.14-rc4-rt7 - mtrr questions MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, I have precious little to compare here, and no experience, but from a thread on another list where I was looking at a machine that had some error messages about mtrr I started looking at the 3 machines I have here. They are all quite different machines and give quite different results for mtrr setup. None the less it was the AMD64/2.6.14-rc4-rt7 machine that seemed to have the least going on which surprised me. This machine is an AMD64 machine running 2.6.14-rc4-rt7. It has only a single mtrr and nothing that seems to relate to the VGA controller: Can this be correct? NOTE: This machien has an ATI VGA and since there is no ATI driver yet this machine doesn't load a VGA driver outside of Xorg-X11. Is this why I have no mtrr's? mark@lightning ~ $ cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1 mark@lightning ~ $ This machine is a one year old Intel P4HT machine with (I think) a shared memory VGA architecture. Again, nothing really related directly to the graphics controller, although it appears that the machine has mapped out some of main memory, possibly for the VGA? mark@dragonfly ~ $ cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size=983552MB: write-back, count=1 reg01: base=0x1f000000 ( 496MB), size=983056MB: uncachable, count=1 mark@dragonfly ~ $ This is the oldest machine, an Athlon XP 1600+ / KT266 type chipset. It has an NVidia VGA with 256MB of memory. This machine's mtrr's seems to make the most sense to me: gigastudio ~ # cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1 reg01: base=0x20000000 ( 512MB), size= 256MB: write-back, count=1 reg02: base=0xe8000000 (3712MB), size= 128MB: write-combining, count=1 reg07: base=0xf0000000 (3840MB), size= 128MB: write-combining, count=1 gigastudio ~ # So I think the question is does all of this make sense, or is 2.6.14-rc4-rt7 not setting up the NForce4/AMD64/PCI-E system correctly? Thanks, Mark