I'm curious how the following situation is handled by thread scheduler...
Consider a multi-core system with thread A limited by runmask to be scheduled on core 0 only. If the thread A becomes 
ready but thread scheduler determines that core 0 is at the moment occupied with a higher priority thread B which can 
also be run on other cores, does it move thread B to continue execution on a different core which was idle or handling a
 thread with priority less than that of A to make core 0 available for thread A?