From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753474Ab2LYBGW (ORCPT ); Mon, 24 Dec 2012 20:06:22 -0500 Received: from terminus.zytor.com ([198.137.202.10]:35166 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753130Ab2LYBGV (ORCPT ); Mon, 24 Dec 2012 20:06:21 -0500 Message-ID: <50D8FBF9.6050509@zytor.com> Date: Mon, 24 Dec 2012 17:06:01 -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: Konrad Rzeszutek Wilk CC: Yinghai Lu , Thomas Gleixner , Ingo Molnar , "Eric W. Biederman" , Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [PATCH v7 00/27] x86, boot, 64bit: Add support for loading ramdisk and bzImage above 4G References: <1355814959-10573-1-git-send-email-yinghai@kernel.org> <20121222024225.GG3468@phenom.dumpdata.com> <20121222132419.GB2936@phenom.dumpdata.com> In-Reply-To: <20121222132419.GB2936@phenom.dumpdata.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/22/2012 05:24 AM, Konrad Rzeszutek Wilk wrote: > > Interestingly enough I only see this on any AMD machine - different > motherboards, different memory configurations. > > And also in a HVM guest running on an AMD machine. If it runs on Intel > it works just fine. > Could this be the ljmpq problem that Borislav reported (Intel implemented ljmpq, AMD didn't, and I was tempted by a micro-optimization which broke AMD which made it into the patchset)? -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.