kern/144917: Flowtable crashes system

[Mikolaj Golub]

Are you  sure about process' name 'flowcontroller'?

zhuzha:~% grep -R flowcontroller /usr/src/sys 
zhuzha:~% 

May be you mean 'flowcleaner'? If so it might be related to the issue
discussed on freebsd-net@ in February (Subject: mpd has hung):

http://lists.freebsd.org/pipermail/freebsd-net/2010-February/024642.html

You could try patches provided by Bjoern there to see if it helps.

-- 
Mikolaj Golub