Deadlocks / hangs in ZFS

Hi,

does someone else experience deadlocks / hangs in ZFS?

What I see is that if on a 2 socket / 4 cores -> 16 threads system I  
do a lot in parallel (e.g. updating ports in several jails), then the  
system may get into a state were I can login, but any exit (e.g. from  
top) or logout of shell blocks somewhere. Sometimes it helps to CTRL-C  
all updates to get the system into a good shape again, but most of the  
times it doesn't.

On another system at the same rev (333966) with a lot less CPUs (and  
AMD instead of Intel), I don't see such a behavior.

Bye,
Alexander.

-- 
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