Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761621AbYAQXKe (ORCPT ); Thu, 17 Jan 2008 18:10:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757922AbYAQXKS (ORCPT ); Thu, 17 Jan 2008 18:10:18 -0500 Received: from outbound-sin.frontbridge.com ([207.46.51.80]:7995 "EHLO outbound7-sin-R.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757826AbYAQXKN (ORCPT ); Thu, 17 Jan 2008 18:10:13 -0500 X-BigFish: VP X-MS-Exchange-Organization-Antispam-Report: OrigIP: 163.181.251.8;Service: EHS X-Server-Uuid: D6C75999-9DAF-4D89-B9AC-C25E3A0BB76A Date: Fri, 18 Jan 2008 00:06:07 +0100 From: "Andreas Herrmann3" To: "Ingo Molnar" cc: "Venki Pallipadi" , ak@muc.de, ebiederm@xmission.com, rdreier@cisco.com, torvalds@linux-foundation.org, gregkh@suse.de, airlied@skynet.ie, davej@redhat.com, tglx@linutronix.de, hpa@zytor.com, akpm@linux-foundation.org, arjan@infradead.org, jesse.barnes@intel.com, davem@davemloft.net, linux-kernel@vger.kernel.org, suresh.b.siddha@intel.com Subject: Re: [patch 0/4] x86: PAT followup - Incremental changes and bug fixes Message-ID: <20080117230607.GI12631@alberich.amd.com> References: <20080116023955.597433000@intel.com> <20080116185748.GA11244@alberich.amd.com> <20080116203328.GA17869@linux-os.sc.intel.com> <20080117191211.GA12631@alberich.amd.com> <20080117203600.GB27778@elte.hu> <20080117210301.GC12631@alberich.amd.com> <20080117211308.GA7858@elte.hu> <20080117214228.GD12631@alberich.amd.com> <20080117222634.GG12631@alberich.amd.com> <20080117223551.GA23543@elte.hu> MIME-Version: 1.0 In-Reply-To: <20080117223551.GA23543@elte.hu> User-Agent: Mutt/1.5.16 (2007-06-09) X-OriginalArrivalTime: 17 Jan 2008 23:05:51.0416 (UTC) FILETIME=[812DEB80:01C8595D] X-WSS-ID: 6B9100D824S8211700-01-01 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 983 Lines: 37 On Thu, Jan 17, 2008 at 11:35:51PM +0100, Ingo Molnar wrote: > > * Andreas Herrmann3 wrote: > > > > I'll check this asap > > > > So, now that I've avoided this tiny NULL-pointer-dereference, the > > system boots fine as well with your (slightly modified) patch. See > > dmesg attached. > > for now i applied your ioremap_uncached() patch and removed my patch. > > my patch might work if the MTRR marks that area UC. Does it on your > system? The region (c0403000-c04031ff) is not characterized by an MTRR. The MTRRdefType specifies it and it is MTRRdefType = 0x0000000000000c00 MemType=0 MtrrDefTypeFixEn=0x1 MtrrDefTypeEn=0x1 => 0==UC So, that's why it worked. Andreas -- 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/