From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752912Ab3ABSFW (ORCPT ); Wed, 2 Jan 2013 13:05:22 -0500 Received: from terminus.zytor.com ([198.137.202.10]:52763 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752779Ab3ABSFU (ORCPT ); Wed, 2 Jan 2013 13:05:20 -0500 Message-ID: <50E476C2.7060300@zytor.com> Date: Wed, 02 Jan 2013 10:04:50 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: Nathan Zimmer CC: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, matt.fleming@intel.com, tglx@linutronix.de, mingo@redhat.com Subject: Re: BUG: unable to handle kernel paging request at 000000effd870020 References: <20130102172107.GA26761@gulag1.americas.sgi.com> In-Reply-To: <20130102172107.GA26761@gulag1.americas.sgi.com> X-Enigmail-Version: 1.4.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/02/2013 09:21 AM, Nathan Zimmer wrote: > I am getting an early boot problem. It only happens on the larger of the > machines I haven't seen it crop up on machines with more then 512 GB of ram. > It shows in the latest linus kernel too. > > I am (wildly) guessing that what is happening is that the new_memmap that is > being passed to bios is somehow placed incorrectly. > I have come up with a workaround. By placing it the DMA area the issue goes > away but that doesn't seem like a real fix. > What does your memory map look like? -hpa