Date: Fri, 11 May 2007 12:19:37 +0200 From: "Florian C. Smeets" <flo@kasimir.com> To: Rui Paulo <rpaulo@fnop.net> Cc: freebsd-smp@freebsd.org Subject: Re: Fixing SMP on MacBooks Message-ID: <46444339.6030707@kasimir.com> In-Reply-To: <86sla45iq9.wl%rpaulo@fnop.net> References: <86sla45iq9.wl%rpaulo@fnop.net>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Rui Paulo wrote: > Hi, Hi! > I would like to bring this discussion to a wider audicence. > > So, here's the problem: > As some of you already know, the second core on Apple's MacBooks fails > to start. There are two nasty tricks to make it start (both involve > interactivity from the user) that I know of. > > They are: > 1) Press the power button during the IPI timeout; > 2) Press a key [1] before the IPIs are sent *OR* during the > IPI timeout. > > [1] This is really an interrupt. Pressing the Fn key doesn't work > because the Fn key doesn't generate an interrupt. > > There tricks don't work on the MacBook Pro. While the source of the > problem might be the same, it's not clear why the tricks work. > Well i was able to boot a 7-CURRENT snapshot from February or March on a first rev. MBP and it did recognize the second core when pressing the power button right after this line: ACPI APIC Table: <APPLE Apple00> This used to work reliably. Thanks for working on the MacBook support for FreeBSD! I will be setting up a partition for FreeBSD again this weekend. So if you have anything to test you can count me in :-) Cheers Florian -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (Darwin) iD8DBQFGREM5A+1tjUZ1YScRCmq3AJ46Uzuc+DDbsxSJQXto2FH9mj+i/wCfVNfh C7YvrN0UkibKHyAjaPNPQ+I= =Ezah -----END PGP SIGNATURE-----
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