Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933499AbeALLRq (ORCPT + 1 other); Fri, 12 Jan 2018 06:17:46 -0500 Received: from mx2.suse.de ([195.135.220.15]:37268 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932993AbeALLRp (ORCPT ); Fri, 12 Jan 2018 06:17:45 -0500 Subject: Re: [x86-tip] RSDP changes converted i4790 box SMP -> UP To: Mike Galbraith Cc: LKML , Thomas Gleixner , Peter Zijlstra , Ingo Molnar References: <1515675936.7350.15.camel@suse.de> <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> <668caea1-5a34-cf8e-a515-a7fa126bb7ee@suse.com> <1515744098.6703.11.camel@suse.de> From: Juergen Gross Message-ID: Date: Fri, 12 Jan 2018 12:17:43 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 MIME-Version: 1.0 In-Reply-To: <1515744098.6703.11.camel@suse.de> Content-Type: text/plain; charset=iso-8859-15 Content-Language: de-DE Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On 12/01/18 09:01, Mike Galbraith wrote: > On Fri, 2018-01-12 at 07:40 +0100, Juergen Gross wrote: >> On 12/01/18 05:25, Mike Galbraith wrote: >>> Hi Juergen, >>> >>> Yesterday I wanted to test the RETPOLINE stuff in tip and tip-rt, but >>> discovered instead that my box had turned into a complete slug, not due >>> to incredible RETPOLINE overhead, rather because box had forgotten that >>> it had more than one CPU. ?I was going to leave it for the weekend, but >>> firing up gitk over morning java, I noticed the commits below, and sure >>> enough, that's what broke my box. ?Given other people's boxen work, >>> seems likely that the authors of the AMI BIOS in this box were a bit >>> more creative than usual. >> >> So I'm curious how this should be possible. > > Box is absolutely certain that it is. > >> Some questions: >> >> - which bootloader are you using? > > grub2, box is bog standard opensuse-42.3 > >> - what does /sys/kernel/boot_params/version contain? > > 0x020e Hmm, what does: cat /sys/kernel/boot_params/data | od -t x1 -A x | grep -e ^0002 report? Please do that with 0c89cf36424f7c1177de8a5712514d7cc2eb369f reverted and with 2f74cbf947f45fa082dda8eac1a1f1299a372f49 applied. Juergen