From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753873AbaEFQIK (ORCPT ); Tue, 6 May 2014 12:08:10 -0400 Received: from mail-qc0-f180.google.com ([209.85.216.180]:57425 "EHLO mail-qc0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751129AbaEFQIJ (ORCPT ); Tue, 6 May 2014 12:08:09 -0400 X-Google-Original-From: Vince Weaver Date: Tue, 6 May 2014 12:11:49 -0400 (EDT) From: Vince Weaver To: Peter Zijlstra cc: Vince Weaver , linux-kernel@vger.kernel.org, Ingo Molnar , Cyrill Gorcunov Subject: Re: perf_fuzzer crash on pentium 4 In-Reply-To: <20140506154637.GW26782@laptop.programming.kicks-ass.net> Message-ID: References: <20140506154637.GW26782@laptop.programming.kicks-ass.net> User-Agent: Alpine 2.10 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 6 May 2014, Peter Zijlstra wrote: > On Tue, May 06, 2014 at 11:42:58AM -0400, Vince Weaver wrote: > > > > So just to be difficult I fired up the perf_fuzzer on a Pentium 4 machine. > > > > It crashes more or less instantly (sorry for the line wrapping, > > just got the serial console hooked up and don't have minicom configured > > right yet). > > > > this is 3.15-rc4 with the anti-memory corruption patch applied. > > *sigh*.. the one x86 PMU driver I really don't know. I might actually > have some P4 class hardware, I'll try and get it wired up this week > somewhere. I have a Pentium II in working condition I can fire up too. All my other older x86 hardware (K6-2, 486) pre-dates performance counters. Just be glad that when I moved I had to leave behind the itanium, PA-RISC, Power-G3, Alpha, SPARC niagara, pentium-pro and K7-athlon machines. Though I guess other than the latter two those wouldn't be your problems. If I had infinite time I'd try to get the SGI Octane, Ultrasparc, and avr32 boards up and going again. Vince