rtprio threads

[Laurie Jennings]

Im trying to get a user space pthread to monitor some kernel buffers but I can't get it to run at
any sort or reliable priority. The docs on rtprio are pretty weak. I've tried to change the rtprio of 
the process, but it just locks up the system. I can't figure it out.

what are the ways to give a user process the top users pace priority? renice doesn't seem to help
much.

Thanks!

Laurie