On Fri, 21 Dec 2007 02:45:20 +0100
Petar Bogdanovic <list+2007@smokva.net> wrote:

> Thanks, I just recompiled the kernel with NMBCLUSTERS=8192. Is this too
> high? What is the unit of this value anyway?

It's high, but still a perfectly sane value for a busy server.
"netstat -m" displays the current mbuf usage.

> Maybe I would have tried increasing NMBCLUSTERS in the first place but
> somehow I couldn't believe that an unprivileged user can kill a whole
> network-link with nothing more than executing his favorite
> bittorrent-client.. :-/

Unless there's some bug in ath(4), the connection should unwedge after
a short while (when transmissions and TCP connections start to time
out, mbufs will be freed).