From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Subject: Re: linux-3.7.10: possible circular locking dependency detected: tty_lock_nested vs. process_one_work Date: Thu, 14 Mar 2013 15:56:13 -0700 Message-ID: <20130314225613.GD11945@kroah.com> References: <514100BE.6030601@fold.natur.cuni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pb0-f50.google.com ([209.85.160.50]:50229 "EHLO mail-pb0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753280Ab3CNW4Q (ORCPT ); Thu, 14 Mar 2013 18:56:16 -0400 Received: by mail-pb0-f50.google.com with SMTP id up1so2870497pbc.23 for ; Thu, 14 Mar 2013 15:56:15 -0700 (PDT) Content-Disposition: inline In-Reply-To: <514100BE.6030601@fold.natur.cuni.cz> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Martin Mokrejs Cc: linux-serial@vger.kernel.org, Jiri Slaby On Wed, Mar 13, 2013 at 11:42:06PM +0100, Martin Mokrejs wrote: > Hi, > I was running my laptop on batteries with pppd using /dev/ttyUSB0 with a 3G usb modem > using the slow option serial driver but with pppd's 'debug nodetach'. pppd did not > therefore detach from my shell but I did not care. ;-) While shutting down the whole > system pppd exited but then ...a possible locking issue was reported. Much later > pppd finally exited. Is the locking issue a false alarm or not? This should be just fine, nothing to worry about, I think this is already fixed in 3.9-rc1. thanks, greg k-h