lock violation in unionfs (9.0-STABLE r230270)

Pavel Polyakov bsd at kobyla.org
Tue Mar 6 10:20:30 UTC 2012

>> mount -t unionfs -o noatime /usr /mnt
>> insmntque: mp-safe fs and non-locked vp: 0xfffffe01d96704f0 is not
>> exclusive locked but should be
>> KDB: enter: lock violation
> Pavel,
> can you give a spin to this patch?:
> http://www.freebsd.org/~attilio/unionfs_missing_insmntque_lock.patch
> I think that the unlocking is due at that point as the vnode lock can
> be switch later on.
> Let me know what you think about it and what the test does.

This patch fixes the problem with lock violation. Sorry I've tested it so

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