Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755939AbZFVIvu (ORCPT ); Mon, 22 Jun 2009 04:51:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752995AbZFVIvm (ORCPT ); Mon, 22 Jun 2009 04:51:42 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:48896 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751732AbZFVIvm (ORCPT ); Mon, 22 Jun 2009 04:51:42 -0400 Date: Mon, 22 Jun 2009 09:52:45 +0100 From: Alan Cox To: michael@ellerman.id.au Cc: Sachin Sant , linux-kernel , linuxppc-dev@ozlabs.org Subject: Re: Badness at drivers/char/tty_ldisc.c:210 during shutdown Message-ID: <20090622095245.38edafdd@lxorguk.ukuu.org.uk> In-Reply-To: <1245655421.4400.78.camel@concordia> References: <4A3A2D2B.7070704@in.ibm.com> <4A3F281F.9000408@in.ibm.com> <1245655421.4400.78.camel@concordia> X-Mailer: Claws Mail 3.7.0 (GTK+ 2.14.7; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1190 Lines: 23 > > [c00000003cf6ba70] [c00000000040a3d0] .tty_ldisc_put+0xa4/0xf4 (unreliable) > > [c00000003cf6bb10] [c00000000040a7c8] .tty_ldisc_reinit+0x38/0x80 > > [c00000003cf6bba0] [c00000000040b1d8] .tty_ldisc_hangup+0x190/0x260 > > [c00000003cf6bc40] [c000000000401090] .do_tty_hangup+0x188/0x4c0 > > [c00000003cf6bd20] [c000000000401440] .tty_vhangup_self+0x34/0x54 > > [c00000003cf6bdb0] [c00000000019236c] .sys_vhangup+0x38/0x58 > > [c00000003cf6be30] [c000000000008534] syscall_exit+0x0/0x40 > > Instruction dump: > > 912b0088 4bcd17bd 60000000 e87e8008 7f44d378 481c04fd 60000000 801b0008 > > 7c09fe70 7d200278 7c004850 54000ffe <0b000000> 7f63db78 4bd7c98d 60000000 > > Ah right, so this has check has just gone in, and the code in question > has been rewritten somewhat just recently. The check is to catch any cases where a line discipline is being freed up but has a refcount that is non zero. I think I know what is going on here. Alan -- 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/