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Subject: Re: [RFC PATCH 2/4] x86: use dmi check to treat disabled cpus as
 hotplug cpus.
From: Suresh Siddha <suresh.b.siddha@intel.com>
Reply-To: Suresh Siddha <suresh.b.siddha@intel.com>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
       "ananth@in.ibm.com" <ananth@in.ibm.com>, Ingo Molnar <mingo@elte.hu>,
       Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
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Organization: Intel Corp
Date: Tue, 12 Jan 2010 10:24:07 -0800
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On Tue, 2010-01-12 at 10:13 -0800, Yinghai Lu wrote:
> ok let stay with option 1.
>
> and would like to use DMI to blacklist those systems that do need treat disabled
> cpus MADT as hotplug cpus.

Yinghai, I don't think we have to worry about disabled cpu's etc using
DMI etc. If we really come across such a system, they can use ACPI FADT
flags (ACPI_FADT_APIC_PHYSICAL) to specify that they need to use
physical mode.

thanks,
suresh