[RFC] sched: Can we rename 'core scheduling' to 'smt scheduling'?

[Wang Jinchao]

The term 'core' in 'kernel/sched/' implies a relation to the kernel of sched,
and at the same time, 'core' is used in 'core scheduling' to represent a CPU core.
Both meanings coexist in the 'core.c' file and appear numerous times.

This can be confusing for newcomers.

--
Wang Jinchao