From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760629Ab0JGPKs (ORCPT ); Thu, 7 Oct 2010 11:10:48 -0400 Received: from terminus.zytor.com ([198.137.202.10]:36654 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751514Ab0JGPKq (ORCPT ); Thu, 7 Oct 2010 11:10:46 -0400 Message-ID: <4CADE2F3.8000908@zytor.com> Date: Thu, 07 Oct 2010 08:10:43 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100921 Fedora/3.1.4-1.fc13 Thunderbird/3.1.4 MIME-Version: 1.0 To: Jan Beulich CC: linux-kernel@vger.kernel.org Subject: Re: patch disabling use of PSE on Atom CPUs with a certain erratum References: <4CADAB3A020000780001B30A@vpn.id2.novell.com> <4CADCF23.5070800@zytor.com> <4CADEED9020000780001B44F@vpn.id2.novell.com> <4CADD442.4050706@zytor.com> <4CADFAE6020000780001B4DC@vpn.id2.novell.com> In-Reply-To: <4CADFAE6020000780001B4DC@vpn.id2.novell.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/07/2010 07:52 AM, Jan Beulich wrote: >>>> On 07.10.10 at 16:08, "H. Peter Anvin" wrote: >> On 10/07/2010 07:01 AM, Jan Beulich wrote: >>>> >>>> Those Atoms don't have 64-bit support. >>> >>> That's different from what I found looking around on the web. >>> >> >> Do tell... > > E.g. > > http://en.wikipedia.org/wiki/List_of_Intel_Atom_microprocessors > > in particular the Atom 230 and Atom 330 (which to my reading match > the spec updates for the 200 and 300 series, which in turn exhibit > the erratum in question). > You're right... I misremembered. The question is what to do at this point, since we're already in trouble. A possible failure on startup seems better than a state in which we could get data corruption at almost any time. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.