more zfs/nfs panics

[Rudy]

>> it just seems to delay the panic though, it smells like some memory leak ...
>>     
>
> Well, the canonical fix seems be to DECREASE vfs.zfs.arc_max to
> something like 100M and keep decreasing until it works.
>   
More info here:
  http://wiki.freebsd.org/ZFSQuickStartGuide

Once you tune, your problems will go away.  The default install should 
not need tuning (so people stop posting this panic problem)... will that 
be fixed in the next stable release?

Rudy