It looks like 'hammer rebalance' (part of hammer cleanup) can panic while doing a b-tree search. I'm in need of a kernel vmcore/binary for this event if it happens to you.
Hammer rebalance is a fairly new feature that was enabled as part of the general hammer cleanup sequence in the last release. So far the panic looks fairly straight forward and it should be easy to fix once I get a core. -Matt Matthew Dillon <dil...@backplane.com>