Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934233AbeAOPcs (ORCPT + 1 other); Mon, 15 Jan 2018 10:32:48 -0500 Received: from mail-wr0-f194.google.com ([209.85.128.194]:46739 "EHLO mail-wr0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751693AbeAOPcr (ORCPT ); Mon, 15 Jan 2018 10:32:47 -0500 X-Google-Smtp-Source: ACJfBovaS2bTxFCVXY7FjCjP6Fdp1RGYUbg634+5qZS9ub1Ev/jpCQtvhEHSVKEuhjtc9ch0LzN12A== Date: Mon, 15 Jan 2018 16:32:43 +0100 From: Ingo Molnar To: Juergen Gross Cc: Borislav Petkov , Mike Galbraith , LKML , Thomas Gleixner , Peter Zijlstra Subject: Re: [x86-tip] RSDP changes converted i4790 box SMP -> UP Message-ID: <20180115153243.3wst57a2fqin2h37@gmail.com> References: <20180111133723.d7x3sekanz5jhut2@gmail.com> <1515682631.16805.3.camel@suse.de> <20180111150331.7zzkd7awdxele54b@gmail.com> <20180111151044.GC6176@hirez.programming.kicks-ass.net> <1515694412.7054.10.camel@suse.de> <1515731128.10188.32.camel@suse.de> <20180112131144.bkopj2ooslwdyvoz@gmail.com> <0af5f083-b659-6c67-1ceb-a2bf9108c879@suse.com> <20180115145615.m54ewqg7vmvp4akj@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: * Juergen Gross wrote: > On 15/01/18 15:56, Borislav Petkov wrote: > > On Mon, Jan 15, 2018 at 03:52:25PM +0100, Juergen Gross wrote: > >> Ingo, with my finding that above boot failure is related to a bug in > >> openSUSE's grub2 (I've verified it soesn't exist in upstream grub2), > > > > The box I'm seeing this on has SLES12-SP2 grub: > > > > Version : 2.02~beta2-115.9.1 > > > > Does it have the same bug? > > The patch introducing this problem is from 2012. So I guess: yes. I suspect this makes it a widespread, unintended ABI. Can we detect and somehow avoid it? The boot protocol ABI sucks if it's fragile against such mistakes. Thanks, Ingo