From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: 2.6.24 regression: reference count leak in PPPoE Date: Sun, 20 Jan 2008 21:01:09 +0100 Message-ID: <20080120200109.GA31876@elte.hu> References: <200801202053.30386.ak@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Linus Torvalds To: Andi Kleen Return-path: Received: from mx2.mail.elte.hu ([157.181.151.9]:47931 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755292AbYATUB0 (ORCPT ); Sun, 20 Jan 2008 15:01:26 -0500 Content-Disposition: inline In-Reply-To: <200801202053.30386.ak@suse.de> Sender: netdev-owner@vger.kernel.org List-ID: * Andi Kleen wrote: > My workstation running 2.6.24-rc8 just hung during shutdown with an > endless (or rather I didn't wait more than a few minutes) loop of > > unregister_netdev: waiting for ppp-device to become free. Usage count > = 1 > > ppp-device was an active PPPoE device. > > No more information currently. i've seen such problems (locked up box with endless loop of usage count == 1) with pppoe in the past, and it seemed to be related to dynamic IPs. (i saw that well before 2.6.24 - reported it once to davem) It seems to have stopped when i stopped using ipsec and started using vpnc. (but no firm info - this was sporadic - happened every few months or so) Are you using ipsec and dynamic IPs by any chance? Ingo