From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751159AbWCZHvE (ORCPT ); Sun, 26 Mar 2006 02:51:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751160AbWCZHvE (ORCPT ); Sun, 26 Mar 2006 02:51:04 -0500 Received: from noby.w34u.sk ([217.67.24.122]:61119 "HELO mail.w34u.sk") by vger.kernel.org with SMTP id S1751159AbWCZHvC (ORCPT ); Sun, 26 Mar 2006 02:51:02 -0500 Message-ID: <442647E4.6080809@skalwifi.sk> Date: Sun, 26 Mar 2006 09:51:00 +0200 From: Martin Petrak User-Agent: Mozilla Thunderbird 1.0.7 (X11/20050923) X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: unregister_netdevice: waiting for ppp0 to become free Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi all, I am using kernel 2.6.14.6-grsec (x86_64 on AMD Sempron 64) with QoS (HTB) Occasionally, when pppd drops a connection I see this in syslog : Mar 25 13:40:17 myserver pppd[1300]: No response to 3 echo-requests Mar 25 13:40:17 myserver pppd[1300]: Serial link appears to be disconnected. Mar 25 13:40:17 myserver pppd[1300]: Connect time 1250.6 minutes. Mar 25 13:40:17 myserver pppd[1300]: Sent 971616622 bytes, received 1884313787 bytes. Mar 25 13:40:20 myserver pppd[1300]: Connection terminated. Mar 25 13:40:30 myserver kernel: unregister_netdevice: waiting for ppp0 to become free. Usage count = 358 Then only force reboot of the machine solves the problem. I found very similar problem with same symptoms : http://groups.google.com/group/linux.debian.kernel/browse_thread/thread/dcb36b5fe827fad6/05445a30be147608 Do you have any ideas how I can debug why dev->refcnt did not reach zero? regards, Martin