We have a "virtual driver" mounted on io-pkt as a normal driver but exchanging packets through standard IPC with other 
processes instead of through the wire.
All stuff works fine but when high packet rate is involved (and fast forward with real interface) we have an io-pkt core
.
I see on sloginfo a the following traces:

Apr 30 09:45:20 5 14 0 ient 82fbc9c from 0 to 1
Apr 30 10:28:07 1 14 0 ipflow: unexpected context: cur: 476 from: 662
Apr 30 10:28:07 5 21 0 run fault pid 770547726 tid 2 signal 6 code 0 ip 0xb033e2c1 sbin/io-pkt-v6-hc

What is the meaning of this "unexpected context" and what can I do to avoid that?
Thanks
Alessio Carlini