Bug#338973: unregister_netdevice: waiting for vpn0 to become free. Usage count = 23

[Marc Lehmann <schmorp@schmorp.de>]

On Mon, Nov 14, 2005 at 11:35:27AM +0100, Maximilian Attems <maks@sternwelten.at> wrote:
> please reassign in those cases. :)

ok! :)

> > This happens whenever I want to upgrade gnu virtual private ethernet and
> > kill it (which should free the tun interface it uses). Following ifconfig
> > -a or other interface-related calls hang till the machine is rebooted hard
> > (shutdown hangs for obvious reasons).
>  
> your .config has several ethernet card enabled which are you using,
> please post the running lsmod?

Hmm, what would ethernet cards have to do with the issue? Anyways, the
lsmod is below.

> also could you try to boot the debian kernel with noapic in boot cmdline?

This is hard to do (it's a production server), and since it's highly
unlikely for an arp cache bug on a virtual tunnel device to be caused by
interrupt problems, I'd rather avoid it unless it's really necessary for
further analysing the bug (which seems to be pretty obvious now)?

Module                  Size  Used by
reiserfs              282096  4 
xfs                   591772  6 
exportfs                6368  1 xfs
autofs4                20772  1 
ipt_REDIRECT            2048  2 
iptable_nat             8036  1 
ip_nat                 20148  2 ipt_REDIRECT,iptable_nat
ip_conntrack           56412  2 iptable_nat,ip_nat
nfnetlink               6680  2 ip_nat,ip_conntrack
ipt_TOS                 2464  15 
iptable_mangle          2880  1 
ipt_REJECT              6016  4 
iptable_filter          3008  1 
ip_tables              22048  6 ipt_REDIRECT,iptable_nat,ipt_TOS,iptable_mangle,ipt_REJECT,iptable_filter
pdc202xx_old           11520  0 [permanent]
pdc202xx_new            9568  0 [permanent]
tun                    12320  1 
w83781d                34660  0 
hwmon_vid               2688  1 w83781d
i2c_isa                 4960  1 w83781d
i2c_viapro              8304  0 
i2c_core               22656  3 w83781d,i2c_isa,i2c_viapro
3c59x                  43368  0 
8139too                29664  0 
mii                     5728  2 3c59x,8139too
dmfe                   22780  0 
de2104x                22944  0 
de4x5                  54144  0 
tulip                  52576  0 
ipv6                  278688  18 
genrtc                  9448  0 
unix                   30192  27 
ext3                  146344  1 
jbd                    62100  1 ext3
mbcache                10180  1 ext3
ide_disk               19200  23 
ide_generic             1376  0 [permanent]
via82cxxx              14140  0 [permanent]
generic                 4516  0 [permanent]
ide_core              135372  6 pdc202xx_old,pdc202xx_new,ide_disk,ide_generic,via82cxxx,generic
evdev                   9760  0 
mousedev               12100  0

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