From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269027AbUHMIFJ (ORCPT ); Fri, 13 Aug 2004 04:05:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269041AbUHMIFJ (ORCPT ); Fri, 13 Aug 2004 04:05:09 -0400 Received: from tentacle.s2s.msu.ru ([193.232.119.109]:56271 "EHLO tentacle.sectorb.msk.ru") by vger.kernel.org with ESMTP id S269027AbUHMIDg (ORCPT ); Fri, 13 Aug 2004 04:03:36 -0400 Date: Fri, 13 Aug 2004 12:03:34 +0400 From: "Vladimir B. Savkin" To: Nuno Silva Cc: linux-kernel@vger.kernel.org, netdev@oss.sgi.com Subject: Re: 2.6.8-rc4-bk1 problem: unregister_netdevice: waiting for ppp0 to become free. Usage count = 1 Message-ID: <20040813080334.GA13337@tentacle.sectorb.msk.ru> References: <411BC284.6080807@vgertech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Disposition: inline In-Reply-To: <411BC284.6080807@vgertech.com> X-Organization: Moscow State Univ., Dept. of Mechanics and Mathematics X-Operating-System: Linux 2.6.8-rc3-barrier User-Agent: Mutt/1.5.5.1+cvs20040105i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 12, 2004 at 08:18:28PM +0100, Nuno Silva wrote: > Hi! > > With 2.6.8-rc4-bk1 I get "Aug 12 17:33:10 puma kernel: > unregister_netdevice: waiting for ppp0 to become free. Usage count = 1" > in the logs after pppd exit. > > Also, the box won't reboot and print that message forever in the > console. sysrq-U && sysrq-R did it :-) > > The last version I tried was 2.6.8-rc2-bk11 and, wrt this prob, is > running fine. So, the problem is in that window and the changelog for > rc4 mentions something about ppp: > http://kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.8-rc4 > > If someone requires more information or tests feel free to ask! I saw this too, with 2.6.7-rc3-mm1. I have discovered that it happens because of idle TCP socket holds a reference to a network device. After killing associated process, device was freed immediately. ~ :wq With best regards, Vladimir Savkin.