SMP on MacBook Pro, some new info

[Nate Lawson]

Maxim Sobolev wrote:
> 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?

My completely unresearched opinion is that the IPI is not reaching the 
AP or the response is getting lost.  I don't know why.


-- 
Nate