Well,
I think I might have discovered the cause of this.
I noticed that when I disabled pf that all the mbufs were released
immediately. I then configured my pf rules from the wireless network
with the 'quick' keyword and the current buffer count doesn't seem to be
rising very much any more - 3 or 4 over the course of a minute while
sending 2 simultaneous ping floods to hosts on the wireless network.
Before I would see the count go up by about 200 every minute.
Is this just an inability of my hardware (soekris net4801) to handle pf?
or is it in any way connected to the fact that it's going out over a
wireless link?
Thanks!