Date: Wed, 24 Oct 2001 09:20:02 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Mike Smith <msmith@freebsd.org> Cc: Marcel Moolenaar <marcel@xcllnt.net>, <ia64@FreeBSD.org> Subject: Re: Enumerating processors using ACPI Message-ID: <20011024091929.I549-100000@salmon.nlsystems.com> In-Reply-To: <200110240814.f9O8ExI08929@mass.dis.org>
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On Wed, 24 Oct 2001, Mike Smith wrote: > > Mike, > > > > I'm looking at SMP support for ia64 and it looks to me that we > > really want to use ACPI to enumerate the processors. Besides > > the phase ordering problem (cpu_mp_probe, cpu_mp_start and > > cpu_mp_announce is called too early to have them keep their > > current meaning) we also need a clean way to scan the devices. > > Assuming that we can reliably expect ACPI on the IA64 to describe the > processors that are actually present (vs. those that merely appear to > be), or we can check for certain that a CPU is present, there's no reason > not to defer attaching the CPU until we handle the Processor device in > the ACPI namespace. My SDV reports two cpus through ACPI but only one is actually present. -- Doug Rabson Mail: dfr@nlsystems.com Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-ia64" in the body of the message
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