I just realized I sent this directly to Clemens, instead of to the list. I guess it's no big deal, but it was supposed to go to the list. On Sat, Oct 08, 2011 at 01:20:34PM +0200, Clemens Ladisch clemens-at-ladisch.de wrote: Thanks, Clemens. That explains why I thought I had it working, and then not working later. The first time, I used the ps command from http://subversion.ffado.org/wiki/IrqPriorities (even though I'm not using ffado), which included the -L option (which also shows threads like H), but the next time I was doing it from memory, and I neglected to include the -L option, so it looked like it wasn't working when it really was. Well, one advantage to making that mistake is that I've now learned something more about ps. I was wondering why there were so few lines in the output from what I remembered from the first time, and now I know. Chuck