SMP support preparation is required.

[mkostoevr]

Now the system only utilizes the first system CPU, it should be able to utilize all the system. This requires a lot of preparation because kernel subsystems should be aware of multi-threading possibility to prevent data races. Also since the change is system-wide and touches a lot of subsystems, it's required to establish a strong test system to support the development process.

Tasks to perform:

• Create a strong test system to catch obvious problems early. #3
• Gradually make the system support MT mode.