Messages in this thread | | | Date | Fri, 1 Sep 2006 11:59:44 +0200 | From | "Jesper Juhl" <> | Subject | Re: Unable to halt or reboot due to - unregister_netdevice: waiting for eth0.20 to become free. Usage count = 1 |
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On 31/08/06, Jesper Juhl <jesper.juhl@gmail.com> wrote: > On 31/08/06, Ben Greear <greearb@candelatech.com> wrote: > > Jesper Juhl wrote: > > > Hi, > > > > > > I've got a small problem with 2.6.18-rc5-git2. > > > > > > I've got a vlan setup on eth0.20, eth0 does not have an IP. > > > > > > When I attempt to reboot or halt the machine I get the following > > > message from the loop in net/core/dev.c::netdev_wait_allrefs() where > > > it waits for the ref-count to drop to zero. > > > Unfortunately the ref-count stays at 1 forever and the server never > > > gets any further. > > > > > > unregister_netdevice: waiting for eth0.20 to become free. Usage count = 1 > > > > > > I googled a bit and found that people have had similar problems in the > > > past and could work around them by shutting down the vlan interface > > > before the 'lo' interface. I tried that and indeed, it works. > > > > > > Any idea how we can get this fixed? > > > > This is usually a ref-count leak somewhere. Used to be IPv6 had > > issues..then there were some neighbor leaks...but these were fixed as > > far as I know. > > > Using IPv4 here. > > > > Can you reproduce this on older kernels? > > > I've not actively tried, but I do have several servers running various > older kernel releases with similar vlan setups and I'm not aware of > any problems with those. Only this new box that I'm using for testing > new kernels (currently) shows the problem, and I've only tried 2.6.8 > and 2.6.18-rc5-git2 on the box so far (2.6.8 doesn't have the > problem). > I've just encountered the problem on a different server with an identical vlan setup. That server is running 2.6.13.4
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