Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755144AbYKMU5n (ORCPT ); Thu, 13 Nov 2008 15:57:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751869AbYKMU5e (ORCPT ); Thu, 13 Nov 2008 15:57:34 -0500 Received: from styx.suse.cz ([82.119.242.94]:56962 "EHLO mail.suse.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751595AbYKMU5e (ORCPT ); Thu, 13 Nov 2008 15:57:34 -0500 Date: Thu, 13 Nov 2008 21:57:32 +0100 (CET) From: Jiri Kosina To: Andi Kleen , Robert Richter cc: oprofile-list@lists.sf.net, Jiri Benc , Vilem Marsik , Eric Dumazet , Ingo Molnar , Pekka Enberg , linux-kernel@vger.kernel.org Subject: Oprofile [still] doesn't work on 2.6.28-rc4 on certain CPU Message-ID: User-Agent: Alpine 1.10 (LNX 962 2008-03-14) 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 Content-Length: 1727 Lines: 59 Hi, there has been a bug [1] recently which caused NMIs to be stuck on certain Intel CPUs, resultung in oprofile not working. This has been fixed by commit 7c64ade53a6f977d73f16243865c42ceae999aea Author: Andi Kleen Date: Fri Nov 7 14:02:49 2008 +0100 oprofile: Fix p6 counter overflow check but we are seeing the very same symptoms still on the following CPU, even with 2.6.28-rc4 (which includes 7c64ade5): processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 47 model name : AMD Athlon(tm) 64 Processor 3000+ stepping : 0 After starting oprofile, no NMI is delivered at all: vulture:~ # opcontrol --start Using 2.6+ OProfile kernel interface. Reading module info. Using log file /var/lib/oprofile/samples/oprofiled.log Daemon started. Profiler running. vulture:~ # grep NMI /proc/interrupts NMI: 0 Non-maskable interrupts vulture:~ # grep NMI /proc/interrupts NMI: 0 Non-maskable interrupts on a quite similar CPU, everything seems to be working smoothly though with the very same kernel -- NMIs are being delivered, and oprofile performs proper profiling: processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 4 model name : AMD Athlon(tm) 64 Processor 3000+ stepping : 8 I haven't yet found a time to start bisecting this. [1] http://lkml.org/lkml/2008/10/30/319 -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/