linux-kernel - RE: smp + acpi

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Message-ID: <CFF307C98FEABE47A452B27C06B85BB6011250B3@hdsmsx411.amr.corp.intel.com>
Date:	Wed, 26 Jul 2006 13:22:52 -0400
From:	"Brown, Len" <len.brown@...el.com>
To:	"Andi Kleen" <ak@...e.de>
Cc:	"Marco Berizzi" <pupilla@...mail.com>,
	<linux-kernel@...r.kernel.org>
Subject: RE: smp + acpi

>> CONFIG_ACPI=y is necessary to parse the ACPI tables
>> and discover HT siblings.  Except for the rare BIOS
>> that gives the option to enumerate HT via MPS
>> (thus breaking some versions of Windows),
>> enabling ACPI is the only way to enable HT.
>> 
>> Yes, in the distant past, CONFIG_ACPI=n did not remove
>> all ACPI code from your kernel, and that was a bug.
>
>Ok thanks for the confirmation.
>
>However the proposed change would be still wrong because
>SMP can be without HT.

What proposed change?

I expect that the problem at hand is that CONFIG_SMP=y
is fine, but with CONFIG_ACPI=n, that isn't going to
find the HT threads on an HT system.

-Len
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