Okay, I'm starting to get traction on my first question -- so here's my second.  I'd like to patch my gumstix kernel with the PREEMPT_RT patch and I'm having a little difficulty as the patches do not cleanly apply to the omap3 kernel at www.sakoman.com.  It seems like some of the PREEMPT_RT patch has been applied already, but other pieces are not there.  Is anyone else working on this -- I'd certainly be happy to share my experiences if you have.  One key question: what is the difference between the linux-omap3 kernel at www.sakoman.com and the linux-omap kernel in the tmlind directory at kernel.org?