From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: BUG: unable to handle kernel paging request at 000000effd870020 Date: Wed, 02 Jan 2013 10:04:50 -0800 Message-ID: <50E476C2.7060300@zytor.com> References: <20130102172107.GA26761@gulag1.americas.sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20130102172107.GA26761-3gyQo36HEq8TG1waqwXmH7Cf4lofQVJ7@public.gmane.org> Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Nathan Zimmer Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org List-Id: linux-efi@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