From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757984AbaEFQCI (ORCPT ); Tue, 6 May 2014 12:02:08 -0400 Received: from mail-qg0-f52.google.com ([209.85.192.52]:42934 "EHLO mail-qg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752029AbaEFQCG (ORCPT ); Tue, 6 May 2014 12:02:06 -0400 X-Google-Original-From: Vince Weaver Date: Tue, 6 May 2014 12:05:41 -0400 (EDT) From: Vince Weaver To: Cyrill Gorcunov cc: Peter Zijlstra , Vince Weaver , linux-kernel@vger.kernel.org, Ingo Molnar Subject: Re: perf_fuzzer crash on pentium 4 In-Reply-To: <20140506154901.GL28248@moon> Message-ID: References: <20140506154637.GW26782@laptop.programming.kicks-ass.net> <20140506154901.GL28248@moon> 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, Cyrill Gorcunov wrote: > On Tue, May 06, 2014 at 05:46:37PM +0200, 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'll take a look, thanks. This happens quickly enough I can probably generate a small test case, but I won't have time to do that until maybe tomorrow. Vince