From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753665Ab0CIIqs (ORCPT ); Tue, 9 Mar 2010 03:46:48 -0500 Received: from lennier.cc.vt.edu ([198.82.162.213]:60598 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753622Ab0CIIqp (ORCPT ); Tue, 9 Mar 2010 03:46:45 -0500 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.2 To: Andrew Morton , Len Brown , Peter Zijlstra , Ingo Molnar Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org Subject: 2.6.33-mmotm0304 - lockdep warning in ACPI code From: Valdis.Kletnieks@vt.edu Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1268124370_4014P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Tue, 09 Mar 2010 03:46:10 -0500 Message-ID: <5057.1268124370@localhost> X-Mirapoint-Received-SPF: 128.173.34.103 localhost Valdis.Kletnieks@vt.edu 2 pass X-Mirapoint-IP-Reputation: reputation=neutral-1, source=Fixed, refid=n/a, actions=MAILHURDLE SPF TAG X-Junkmail-Info: (45) HELO_LOCALHOST X-Junkmail-Status: score=45/50, host=zidane.cc.vt.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A020205.4B960AD3.01AA,ss=1,fgs=0, ip=0.0.0.0, so=2009-09-22 00:05:22, dmn=2009-09-10 00:05:08, mode=multiengine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1268124370_4014P Content-Type: text/plain; charset=us-ascii Seen in my dmesg. Appears to have started in 2.6.33-rc7-mmotm0210, I can't remember if I reported it before or not... [ 0.212297] ACPI: Using IOAPIC for interrupt routing [ 0.340075] [ 0.340076] ============================================= [ 0.340241] [ INFO: possible recursive locking detected ] [ 0.340330] 2.6.33-mmotm0304 #5 [ 0.340415] --------------------------------------------- [ 0.340504] swapper/1 is trying to acquire lock: [ 0.340591] (&dev->mutex){+.+...}, at: [] __driver_attach+0x47/0x80 [ 0.340926] [ 0.340927] but task is already holding lock: [ 0.340999] (&dev->mutex){+.+...}, at: [] __driver_attach+0x39/0x80 [ 0.340999] [ 0.340999] other info that might help us debug this: [ 0.340999] 1 lock held by swapper/1: [ 0.340999] #0: (&dev->mutex){+.+...}, at: [] __driver_attach+0x39/0x80 [ 0.340999] [ 0.340999] stack backtrace: [ 0.340999] Pid: 1, comm: swapper Not tainted 2.6.33-mmotm0304 #5 [ 0.340999] Call Trace: [ 0.340999] [] __lock_acquire+0xc74/0xceb [ 0.340999] [] ? mark_lock+0x2d/0x22c [ 0.340999] [] ? __driver_attach+0x47/0x80 [ 0.340999] [] lock_acquire+0xf5/0x112 [ 0.340999] [] ? __driver_attach+0x47/0x80 [ 0.340999] [] ? mark_held_locks+0x52/0x70 [ 0.340999] [] __mutex_lock_common+0x5c/0x5aa [ 0.340999] [] ? __driver_attach+0x47/0x80 [ 0.340999] [] ? klist_next+0x24/0xd7 [ 0.340999] [] ? __driver_attach+0x47/0x80 [ 0.340999] [] ? __driver_attach+0x0/0x80 [ 0.340999] [] mutex_lock_nested+0x34/0x39 [ 0.340999] [] __driver_attach+0x47/0x80 [ 0.340999] [] ? __driver_attach+0x0/0x80 [ 0.340999] [] ? __driver_attach+0x0/0x80 [ 0.340999] [] bus_for_each_dev+0x54/0x89 [ 0.340999] [] driver_attach+0x19/0x1b [ 0.340999] [] bus_add_driver+0xb4/0x203 [ 0.340999] [] driver_register+0xb8/0x129 [ 0.340999] [] acpi_bus_register_driver+0x3e/0x40 [ 0.340999] [] acpi_ec_init+0x37/0x55 [ 0.340999] [] acpi_init+0x101/0x116 [ 0.340999] [] ? acpi_init+0x0/0x116 [ 0.340999] [] do_one_initcall+0x59/0x14e [ 0.340999] [] kernel_init+0x14d/0x1d7 [ 0.340999] [] kernel_thread_helper+0x4/0x10 [ 0.340999] [] ? restore_args+0x0/0x30 [ 0.340999] [] ? kernel_init+0x0/0x1d7 [ 0.340999] [] ? kernel_thread_helper+0x0/0x10 [ 0.341046] ACPI: EC: GPE = 0x11, I/O: command/status = 0x934, data = 0x930 --==_Exmh_1268124370_4014P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFLlgrScC3lWbTT17ARAv2xAJ4o03w8LMPUtwT6dXar/ubrrDCQ4wCbBmrw LjONQy/NhE39wgDxLVjrdc4= =nFps -----END PGP SIGNATURE----- --==_Exmh_1268124370_4014P--