linux-kernel - Re: [patch 2/2] x2apic: use x2apic id reported by cpuid during topology discovery

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Message-ID: <20080819002402.GG9914@elte.hu>
Date:	Tue, 19 Aug 2008 02:24:02 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	hpa@...or.com, tglx@...utronix.de, linux-kernel@...r.kernel.org,
	Yinghai Lu <yhlu.kernel@...il.com>
Subject: Re: [patch 2/2] x2apic: use x2apic id reported by cpuid during
	topology discovery


* Suresh Siddha <suresh.b.siddha@...el.com> wrote:

> use x2apic id reported by cpuid during topology discovery, instead of the
> apic id configured in the APIC. For most of the systems, x2apic id
> reported by cpuid leaf 0xb will be same as the physical apic id reported
> by the APIC_ID register of the APIC. We follow the suggested guidelines
> and use the apic id reported by the cpuid.
> 
> No change to non-generic UV platforms, will use the apic id reported in the
> APIC_ID register as the cpuid reported apic id's may not be unique.
> 
> Signed-off-by: Suresh Siddha <suresh.b.siddha@...el.com>

applied both fixes to tip/x86/x2apic - thanks Suresh!

	Ingo
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