Watchdog questions

I recently configured SW_WATCHDOG in my kernel and put watchdogd_enable="YES" 
in my rc.conf, hoping it would reboot the machine automatically if it hangs. 
However, it seems that the watchdog just triggers a panic without resetting 
the machine - how can I configure things to reboot?

Also I noticed that the default timeout (what is the default timeout anyway - 
the watchdogd manpage doesn't tell) is a little short: I got a watchdogd 
triggered panic once during a normal shutdown, after "rebooting" was printed 
but before the reboot could happen.

-- 
   ,_,   | Michael Nottebrock               | lofi_at_freebsd.org
 (/^ ^\) | FreeBSD - The Power to Serve     | http://www.freebsd.org
   \u/   | K Desktop Environment on FreeBSD | http://freebsd.kde.org