SMP on MacBook Pro, some new info

[Maxim Sobolev]

Hi,

I have discovered that it's possible with a very good repeatability (90% 
or more) to start the second core by pressing power button promptly 
during the 5 second period when BSP have sent startup IPIs already and 
is waiting for the AP going online. I am not sure how to interpret this 
info - perhaps there is some problem with caching BSPs LAPIC writes, and 
interrupt generated by the power button causes the cache to be flushed.

Any ideas?

-Maxim