New: after lxc-stop: unregister_netdevice: waiting for lo to become free. Usage count: 3

Bugme-new Andrew Morton 1 participant 1 message Mar 2, 2011 1 message not in the archive

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Andrew Morton

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2011-03-02 00:14 UTC #1 lore raw

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Quoted 40 lines · On Mon, 28 Feb 2011 14:47:03 GMT [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=30082
Summary: after lxc-stop: unregister_netdevice: waiting for lo
to become free. Usage count: 3
Product: Networking
Version: 2.5
Kernel Version: 2.6.36 2.6.37
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
As far as I can tell so far this is triggered by lxc version 0.7.4, at least I haven't seen this before. I tried 2.6.36[.3] and 2.6.37[.2] kernels so far, both behaves similarly.
The problem is, when I shut down a container which uses bridged veth interface pair using lxc-stop, the container terminates, but host system starts crying about unregister_netdevice like this:
[902885.096462] unregister_netdevice: waiting for lo to become free. Usage
count = 3
[902895.229785] unregister_netdevice: waiting for lo to become free. Usage
count = 3
[...]
[904247.123002] unregister_netdevice: waiting for lo to become free. Usage
count = 3
After some, random, time, this stops - sometimes after just one message, sometimes after several minutes. Sometimes it does not happen at all.
This looks like a kernel issue triggerable by lxc-0.7.4.