kern/134011

[Randy Bush]

>>> this bug is now causing system lockup when the midnight gmt jobs run on
>>> one system and it manifesting with less serious consequences on three
>>> others.
>> oh, and other folk have reported on list of seeing the same.  though
>> they have not added to the pr.
> If you're using ZFS then you want to get to the tip of current to pick 
> up the VM backpressure fixes that were added.

the problem is worst on a zfs system, crashing.  and it is upgrading now
and does so once a week.

the problem also manifests on non-zfs systems.

randy