Now that everyone has an RPi2 and has the extra cores up and running (you did buy one, right? And saw the SMP demos? ) the next step is figuring out the interrupts and inter process communication.
So far I figured out that Broadcom tagged on extra interrupts on top of what RPi1 had and there should be a core local timer in the extra block. Has anyone figured out how many interrupts there are now and what they are?
What is the mechanism to send interrupts from software between cores?