From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755712Ab2KMTzj (ORCPT ); Tue, 13 Nov 2012 14:55:39 -0500 Received: from mail-ea0-f174.google.com ([209.85.215.174]:43471 "EHLO mail-ea0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755695Ab2KMTzi (ORCPT ); Tue, 13 Nov 2012 14:55:38 -0500 Message-ID: <50A2A5B6.4080600@suse.cz> Date: Tue, 13 Nov 2012 20:55:34 +0100 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: Fengguang Wu CC: LKML Subject: Re: WARNING: at drivers/tty/tty_buffer.c:476 flush_to_ldisc() References: <20121113052026.GA26289@localhost> In-Reply-To: <20121113052026.GA26289@localhost> X-Enigmail-Version: 1.5a1pre Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/13/2012 06:20 AM, Fengguang Wu wrote: > Hi Jiri, Hi, > I got the following warning > > cat: /proc/1/maps: No such file or directory > [ 72.249806] ------------[ cut here ]------------ > [ 72.250807] WARNING: at /c/kernel-tests/src/tip/drivers/tty/tty_buffer.c:476 flush_to_ldisc+0x5a/0x1ad() > [ 72.252674] tty is NULL > [ 72.253182] Pid: 15, comm: kworker/0:1 Not tainted 3.7.0-rc4-05821-gdb38463 #166 > [ 72.253672] Call Trace: > [ 72.253672] [] warn_slowpath_common+0x62/0x79 > [ 72.256297] [] warn_slowpath_fmt+0x46/0x48 > [ 72.257292] [] flush_to_ldisc+0x5a/0x1ad > [ 72.258478] [] process_one_work+0x246/0x44f > [ 72.259640] [] ? process_one_work+0x1b3/0x44f > [ 72.260817] [] ? tty_buffer_free+0x61/0x61 > [ 72.261820] [] worker_thread+0x1ed/0x2c8 > [ 72.262883] [] ? rescuer_thread+0x140/0x140 > [ 72.263878] [] kthread+0xd4/0xdc > [ 72.264980] [] ? finish_task_switch.constprop.79+0x7a/0xbf > [ 72.266150] [] ? __kthread_parkme+0x61/0x61 > [ 72.267145] [] ret_from_fork+0x7a/0xb0 > [ 72.268361] [] ? __kthread_parkme+0x61/0x61 > > and it's bisected to > > commit ecbbfd44a08fa80e0d664814efd4c187721b85f6 Yes, I know about this already. Can you reproducible that easily given you bisected that? I would love to be able to reproduce that... thanks, -- js suse labs