From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 9 Sep 2001 13:07:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 9 Sep 2001 13:07:37 -0400 Received: from arioch.oche.de ([194.94.252.126]:42508 "HELO arioch.oche.de") by vger.kernel.org with SMTP id ; Sun, 9 Sep 2001 13:07:28 -0400 To: linux-kernel@vger.kernel.org Subject: Athlon/K7-Opimisation problems Mail-Copies-To: never From: Carsten Leonhardt Date: 09 Sep 2001 19:07:39 +0200 Message-ID: <87g09w70o4.fsf@cymoril.oche.de> User-Agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.4 (Copyleft) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, here's my data regarding the K7 optimisation problem. Until last week I had a 1GHz Athlon with 133MHz FSB. I then bought a 1.4GHz Athlon, again 133MHz FSB. I never had any problems with the 1GHz processor, but as soon as I stuck the 1.4GHz processor in, the kernel oopsed itself to oblivion. (That was with kernel 2.4.5-ac5, approximately) I also noticed that the computer booted ok with the Debian bootfloppies, which use a kernel compiled for i386. So after several kernel compile/boot cycles, I found out that I had to disable K7 optimisation to make the system boot again. The mainboard is a Tyan Trinity KT-A (S2390B) with a VIA KT133A chipset. After reading here that it may be the PSU, I upgraded my 300W PSU to a 431W Enermax, which made no difference. The only difference I can make out between the working and the non-working CPU is the internal clockspeed of the CPU and the stepping (old: 2, new: 4). Appended is the output of /proc/cpuinfo (I sold the old CPU, but the guy who bought it sent me the output). I really hope this helps someone. If anyone needs any more data, or wants me to test something, contact me. Yours, leo Old CPU: processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 4 model name : AMD Athlon(tm) Processor stepping : 2 cpu MHz : 1012.530 cache size : 256 KB fdiv_bug : no hlt_bug : no sep_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 6 mce cx8 sep mtrr pge 14 cmov pat 17 psn mmxext mmx fxsr 3dnowext 3dnow bogomips : 2018.51 New CPU: processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 4 model name : AMD Athlon(tm) Processor stepping : 4 cpu MHz : 1400.098 cache size : 256 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 pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow bogomips : 2791.83