I think this is kernel dependent and probably will change over time depending on the kernel a release uses, correct me if wrong
I'd like to know two things for all the currently supported Ubuntu releases:
How many maximum CPUs can Ubuntu handle (by default) at the same time with a standard desktop kernel? Is that count different from a server kernel and 32bit/64bit systems?
Where can I find that information on my system?
NR_CPUS
I think.