linux-kernel - Re: [RFC PATCH 2/4] x86: use dmi check to treat disabled cpus as hotplug cpus.

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Message-Id: <1263320647.2854.295.camel@sbs-t61.sc.intel.com>
Date:	Tue, 12 Jan 2010 10:24:07 -0800
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"ananth@...ibm.com" <ananth@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 2/4] x86: use dmi check to treat disabled cpus as
 hotplug cpus.

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

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