[Xen-users] unregister_netdevice: waiting for vif3.0 to become free. Usage count = 15

[Anton Khalikov <anton@xxxxxxxxxxx>]

Hello guys

I am sorry if I am annoying but I still get such messages when I try to 
reboot/shutdown any domU. Yesterday I upgraded my xen to the latest 
testing (3.0.2-2) with the latest available kernel (2.6.26.13) but the 
problem is still here. It happens almost always when i do shutdown and 
time to time when I do reboot.
After this happens I can't reboot my dom0 except of using SysRq reboot 
(reset). ifconfig gets frozen too. Actually nothing helps me to solve 
the problem without rebooting the whole server.
The worst part of this problem is that I can't boot affected domU after 
this because dead domU becomes Zombie process and locks all resources 
used by it ie memory and disk partition (lvm) so the only solution i 
found yet is to stop all domUs and do SysRq reset of dom0.
I use bridged networking and I am sure this is something related to 
kernel support of bridged networks.
Google says that such problem existed in old kernels (ie. 2.6.8) but 
after there was a patch that had to solve this problem. I checked my 
kernel (infact this is the stock kernel downloaded by xen from 
kernel.org) and my kernel contains this patch.
Does anyone have any ideas about this ?

--
Best regards
Anton Khalikov

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