linux-kernel - Re: [PATCH] x86_64: make amd quad core 8 socket system not be clustered

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Message-ID: <20080224075039.GA9052@elte.hu>
Date:	Sun, 24 Feb 2008 08:50:39 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <Yinghai.Lu@....COM>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86_64: make amd quad core 8 socket system not be
	clustered_box v2


* Yinghai Lu <Yinghai.Lu@....COM> wrote:

> quad core 8 socket system will have apic id lifting.the apic id range 
> could be [4, 0x23]. and apic_is_clustered_box will think that need to 
> three clusters and that is large than 2. So it is treated as 
> clustered_box.
> 
> and will get
> 
> Marking TSC unstable due to TSCs unsynchronized
> 
> even the CPUs have X86_FEATURE_CONSTANT_TSC set.
> 
> this patch will check if the cpu is from AMD.

thanks Yinghai, applied.

	Ingo
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