I ran into this issue on a busy vtund server, it would eventually deadlock networking After some detective work it appears to be as a result of this bug https://bugzilla.redhat.com/show_bug.cgi?id=541224 The bug report has a patch, I applied it to the kernel source and rebuilt a new kernel RPM which I installed on our vtun servers . This has resolved the issue for us please let me know if this solves the issue for you too. regards Brendan On Mon, 2010-04-05 at 09:57 -0430, Daniel Bruno wrote: > On Wed, Mar 24, 2010 at 9:21 AM, robert mena <robert.mena at gmail.com> wrote: > > Hi, > > Does it prevent you from accessing the machine with several of those > > messages appearing ? Like it was re spawning ? > > > The same here without a clue? > nop. > > > Does the version of vtund is the same in both ends? > > Yeah, the same version in both ends. > > > On Sat, Mar 20, 2010 at 11:05 AM, Daniel Bruno > > <danielbruno at projetofedora.org> wrote: > >> > >> Hello, > >> > >> I have two hosts with a tunnel closed by vtun, when I reboot a host, > >> the other show the error bellow. > >> > >> unregister_netdevice: waiting for tun0 to become free. Usage count = 6 > >> > >> OS version: CentOS 5.4 > >> Vtund version: vtun-3.0.2-1 > >> > >> some idea about? > >> > >> Thanks > >> -- > >> Daniel Bruno