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Date: Mon, 15 May 2006 20:24:42 -0700
From: Nate Lawson <nate@root.org>
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To: Maxim Sobolev <sobomax@FreeBSD.org>
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Cc: "current@freebsd.org" <current@FreeBSD.org>, John Baldwin <jhb@FreeBSD.org>
Subject: Re: SMP on MacBook Pro, some new info
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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