From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753426Ab3CXL4E (ORCPT ); Sun, 24 Mar 2013 07:56:04 -0400 Received: from mail.skyhub.de ([78.46.96.112]:50729 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753379Ab3CXLz7 (ORCPT ); Sun, 24 Mar 2013 07:55:59 -0400 Date: Sun, 24 Mar 2013 12:55:56 +0100 From: Borislav Petkov To: Ingo Molnar , Peter Zijlstra Cc: Arnaldo Carvalho de Melo , lkml Subject: BUG: using smp_processor_id() in preemptible [00000000] code: asm/8267 Message-ID: <20130324115556.GA4866@pd.tnic> Mail-Followup-To: Borislav Petkov , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , lkml MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, so I was tracing a small .c program like so: $ ./perf record ~/test/asm and here's what got spewed in dmesg. Kernel is plain -rc4. Any pending fixes in tip I should try? [ 3700.194208] BUG: using smp_processor_id() in preemptible [00000000] code: asm/8333 [ 3700.194226] caller is perf_event_task_ctx+0x55/0x140 [ 3700.194235] Pid: 8333, comm: asm Not tainted 3.9.0-rc4 #1 [ 3700.194243] Call Trace: [ 3700.194261] [] debug_smp_processor_id+0xd2/0xf0 [ 3700.194279] [] perf_event_task_ctx+0x55/0x140 [ 3700.194296] [] perf_event_task+0x1d2/0x3c0 [ 3700.194308] [] ? perf_event_task+0x6d/0x3c0 [ 3700.194324] [] perf_event_exit_task+0x166/0x250 [ 3700.194333] [] do_exit+0x27e/0xb20 [ 3700.194340] [] ? error_sti+0x5/0x6 [ 3700.194349] [] ? retint_swapgs+0xe/0x13 [ 3700.194358] [] do_group_exit+0x4c/0xc0 [ 3700.194365] [] sys_exit_group+0x17/0x20 [ 3700.194373] [] system_call_fastpath+0x1a/0x1f -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --