ntpd entered uninterruptible sleep

[AGC <agcarver+netbsd%acarver.net@localhost>]

I sent a message over to the ntpd list about this and they seem to think 
it's a kernel issue.

Anyway, so it seemed the lockups of my IPX were showing up when ntpd was 
running in high priority mode.  Last week I put its priority back to 
normal and attempted to break it again by polling it every five seconds.

Today I got my result, ntpd itself locked up but according to ps, its 
status was "uninterruptible sleep".  This time, because the priority was 
normal, the entire machine didn't crash but the cpu was spinning wildly 
until I was able to kill and restart ntpd.  I forgot to try and run a 
trace on it, but I'm sure it'll lock up again (ktrace -p <pid> does it 
correct)?

Any ideas why this would happen?  I'm assuming that the lower priority 
prevented the locked up code from taking over the entire system. 
Everything else stayed running but ran very slowly (five seconds from 
keypress to character on screen) until ntpd was restarted.