Nothing in the logs prior to the first error message.
I've hit this before at different times on other servers. If there are
some commands I can run to gather more diagnostics on the problem,
please let me know and I'll capture more information next time.
I see the error was reported with older 2.6 kernels and a patch was
floating around. I'm not sure if that is integrated into the current
2.6.11 kernel.
http://www.google.com/search?q=unregister_netdevice%3A+waiting
Regards, Peter
Jul 10 16:52:03 host39 sshd(pam_unix)[19779]: authentication failure;
logname= uid=0 euid=0 tty=ssh ruser= rhost=140.123.23.77 user=halt
Jul 10 16:52:07 host39 sshd(pam_unix)[19781]: check pass; user unknown
Jul 10 16:52:07 host39 sshd(pam_unix)[19781]: authentication failure;
logname= uid=0 euid=0 tty=ssh ruser= rhost=140.123.23.77
Jul 11 12:04:04 host39 kernel: unregister_netdevice: waiting for tap24
to become free. Usage count = 1
Blaisorblade wrote:
On Monday 11 July 2005 21:12, Peter wrote:
Hi. I am hitting a bug that manifests in an unregister_netdevice error
message. After the problem is triggered processes like ifconfig, tunctl
and route refuse to exit, even with killed.
Even from the "D" state below, it's clear that there was a deadlock on some
semaphore, related to tap24... Could you search your kernel logs for traces
of an Oops?
And the only solution I
have found to regaining control of the server is issuing a reboot.
The server is running a number of tap devices. (It is a UML host server
running the skas patches http://www.user-mode-linux.org/~blaisorblade/).
Regards, Peter
# uname -r
2.6.11.7-skas3-v8
unregister_netdevice: waiting for tap24 to become free. Usage count = 1
unregister_netdevice: waiting for tap24 to become free. Usage count = 1
unregister_netdevice: waiting for tap24 to become free. Usage count = 1
unregister_netdevice: waiting for tap24 to become free. Usage count = 1
unregister_netdevice: waiting for tap24 to become free. Usage count = 1
unregister_netdevice: waiting for tap24 to become free. Usage count = 1
unregister_netdevice: waiting for tap24 to become free. Usage count = 1
30684 ? DW 0:45 \_ [tunctl]
31974 ? S 0:00 /bin/bash ./monitorbw.sh
31976 ? S 0:00 \_ /bin/bash ./monitorbw.sh
31978 ? D 0:00 \_ /sbin/ifconfig
31979 ? S 0:00 \_ grep \(tap\)\|\(RX bytes\)
32052 ? S 0:00 /bin/bash /opt/uml/umlcontrol.sh start --user
gildersleeve.de
32112 ? S 0:00 \_ /bin/bash /opt/uml/umlrun.sh --user
gildersleeve.de
32152 ? S 0:00 \_ /bin/bash ./umlnetworksetup.sh
--check --user gildersleeve.de
32176 ? D 0:00 \_ tunctl -u gildersleeve.de -t tap24
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