From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753689Ab1K3Eyp (ORCPT ); Tue, 29 Nov 2011 23:54:45 -0500 Received: from mail-yx0-f174.google.com ([209.85.213.174]:64542 "EHLO mail-yx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752176Ab1K3Eym (ORCPT ); Tue, 29 Nov 2011 23:54:42 -0500 Message-ID: <4ED5B70F.606@lwfinger.net> Date: Tue, 29 Nov 2011 22:54:39 -0600 From: Larry Finger User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: LKML , Borislav Petkov Subject: 3.2-rc2 freezes on boot for AMD K6 - bisected to commit bcb80e53877c2045d9e52f4a71372c3fe6501f6f Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I have an ancient laptop with an AMD-K6 CPU that freezes on boot with 3.2-rc2. The problem was bisected to commit bcb80e53877c2. The cpuinfo for this box is: >> cpu.1: cpuinfo ----- /proc/cpuinfo ----- processor : 0 vendor_id : AuthenticAMD cpu family : 5 model : 8 model name : AMD-K6(tm) 3D processor stepping : 12 cpu MHz : 428.804 cache size : 64 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr cx8 pge mmx syscall 3dnow k6_mtrr up bogomips : 857.60 clflush size : 32 cache_alignment : 32 address sizes : 32 bits physical, 32 bits virtual power management: ----- /proc/cpuinfo end ----- This patch is quite simple, thus it appears that rdmsr() is OK, but that rdmsr_safe() is not. I am happy to provide any other info regarding this box. Larry