From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Lezcano Subject: Re: BUG ? ipip unregister_netdevice_many() Date: Fri, 08 Oct 2010 18:17:12 +0200 Message-ID: <4CAF4408.6070001@free.fr> References: <201010071048.12817.hans.schillstrom@ericsson.com> <4CAEFE2C.3010007@free.fr> <201010081353.28056.hans.schillstrom@ericsson.com> <201010081428.37639.hans.schillstrom@ericsson.com> <4CAF3E78.8030202@free.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Hans Schillstrom , "Eric W. Biederman" , "netdev@vger.kernel.org" To: unlisted-recipients:; (no To-header on input) Return-path: Received: from mtagate6.uk.ibm.com ([194.196.100.166]:48993 "EHLO mtagate6.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753683Ab0JHQRS (ORCPT ); Fri, 8 Oct 2010 12:17:18 -0400 Received: from d06nrmr1806.portsmouth.uk.ibm.com (d06nrmr1806.portsmouth.uk.ibm.com [9.149.39.193]) by mtagate6.uk.ibm.com (8.13.1/8.13.1) with ESMTP id o98GHGeF031964 for ; Fri, 8 Oct 2010 16:17:16 GMT Received: from d06av02.portsmouth.uk.ibm.com (d06av02.portsmouth.uk.ibm.com [9.149.37.228]) by d06nrmr1806.portsmouth.uk.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o98GHHTC3903630 for ; Fri, 8 Oct 2010 17:17:17 +0100 Received: from d06av02.portsmouth.uk.ibm.com (loopback [127.0.0.1]) by d06av02.portsmouth.uk.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id o98GHGvf004352 for ; Fri, 8 Oct 2010 17:17:16 +0100 In-Reply-To: <4CAF3E78.8030202@free.fr> Sender: netdev-owner@vger.kernel.org List-ID: On 10/08/2010 05:53 PM, Daniel Lezcano wrote: > On 10/08/2010 02:28 PM, Hans Schillstrom wrote: >> Hi Eric, >> Any advice how to trace this down ? >> This rollback_registered_many() seems to have on the lists before... >> All IPv4 and IPv6 tunnels causes this crash, all you have to do is >> load the tunnel module(s) >> enter a new ns and exit from it. >> >> Have not tested any more devices than tunnels, >> I did an "ip link delete" on my macvlans before exiting the ns. > > Ah ! I succeed to reproduce it. > It does not appear immediately in fact. > > I am trying to simplify the configuration but I am falling in the bug I > talked about in the previous email. Ok, so after investigating, we just need a macvlan and specify an ipv6 address for it (inside a new netns of course), and the loopback is not released. I compiled out the tunnels, so they are not related to this problem I think. That reduces the scope of investigation :) Looking forward ... -- Daniel