From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751458Ab1KQFGi (ORCPT ); Thu, 17 Nov 2011 00:06:38 -0500 Received: from mail-iy0-f174.google.com ([209.85.210.174]:63815 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750714Ab1KQFGh (ORCPT ); Thu, 17 Nov 2011 00:06:37 -0500 Date: Thu, 17 Nov 2011 13:06:27 +0800 From: Yong Zhang To: Valdis.Kletnieks@vt.edu Cc: Peter Zijlstra , Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: linux-next-20111108 lockdep whinge Message-ID: <20111117050627.GB14492@zhy> Reply-To: Yong Zhang References: <6532.1321501170@turing-police.cc.vt.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <6532.1321501170@turing-police.cc.vt.edu> 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 On Wed, Nov 16, 2011 at 10:39:30PM -0500, Valdis.Kletnieks@vt.edu wrote: > Seen in dmesg during early boot. Not sure if this is a lockdep issue, or a > sched-rt issue, but MAINTAINERS says to ping the same people either way, > so.... :) > > Sorry, no known reproducer, have only seen this once in the last week. Yeah, known issue. Please refer below link: http://marc.info/?l=linux-kernel&m=132082597024248 Thanks, Yong > > [ 4.204350] usb 6-1: USB disconnect, device number 2 > [ 6.660444] usb 6-1: new low-speed USB device number 3 using uhci_hcd > [ 6.683460] INFO: trying to register non-static key. > [ 6.684344] the code is fine but needs lockdep annotation. > [ 6.684417] turning off the locking correctness validator. > [ 6.684417] Pid: 74, comm: irq/20-uhci_hcd Not tainted 3.2.0-rc1-next-20111108 #38 > [ 6.684417] Call Trace: > [ 6.684417] [] register_lock_class+0x102/0x2c6 > [ 6.684417] [] ? register_lock_class+0x1e/0x2c6 > [ 6.684417] [] ? register_lock_class+0x1e/0x2c6 > [ 6.684417] [] ? validate_chain+0x5a/0x39d > [ 6.684417] [] __lock_acquire+0xbd/0x3e2 > [ 6.684417] [] ? double_rq_lock+0x70/0x79 > [ 6.684417] [] lock_acquire+0x103/0x153 > [ 6.684417] [] ? double_rq_lock+0x70/0x79 > [ 6.684417] [] _raw_spin_lock_nested+0x3a/0x49 > [ 6.684417] [] ? double_rq_lock+0x70/0x79 > [ 6.684417] [] ? _raw_spin_lock+0x3e/0x45 > [ 6.684417] [] ? double_rq_lock+0x51/0x79 > [ 6.684417] [] double_rq_lock+0x70/0x79 > [ 6.684417] [] double_lock_balance+0x4f/0x5d > [ 6.684417] [] find_lock_lowest_rq+0x5a/0xfe > [ 6.684417] [] push_rt_task.part.61+0xad/0x149 > [ 6.684417] [] post_schedule_rt+0x1b/0x23 > [ 6.684417] [] post_schedule.part.21+0x2b/0x45 > [ 6.684417] [] __schedule+0x720/0x766 > [ 6.684417] [] ? irq_thread_fn+0x37/0x37 > [ 6.684417] [] schedule+0x55/0x57 > [ 6.684417] [] irq_thread+0x18b/0x1c9 > [ 6.684417] [] ? irq_finalize_oneshot+0xc9/0xc9 > [ 6.684417] [] kthread+0x7f/0x87 > [ 6.684417] [] kernel_thread_helper+0x4/0x10 > [ 6.684417] [] ? retint_restore_args+0xe/0xe > [ 6.684417] [] ? __init_kthread_worker+0x55/0x55 > [ 6.684417] [] ? gs_change+0xb/0xb > [ 6.896264] usb 6-1: New USB device found, idVendor=0e8f, idProduct=0020 > [ 6.897516] usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 > [ 6.898848] usb 6-1: Product: PS2toUSB Adapter > [ 6.899718] usb 6-1: Manufacturer: GASIA > [ 6.917981] input: GASIA PS2toUSB Adapter as /devices/pci0000:00/0000:00:1d.0/usb6/6-1/6-1:1.0/input/input13 > -- Only stand for myself