linux-kernel - Re: [RFC PATCH 3/4] x86: using logical flat for amd cpu too.

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Date:	Mon, 11 Jan 2010 19:16:16 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Yinghai Lu <yinghai@...nel.org>
cc:	Suresh Siddha <suresh.b.siddha@...el.com>,
	"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
Subject: Re: [RFC PATCH 3/4] x86: using logical flat for amd cpu too.



On Mon, 11 Jan 2010, Yinghai Lu wrote:
> 
> tested that amd support logical flat too when cpus num <= 8 and even
> bsp apic id > 8
> 
> so could remove vendor check...

At least this one makes code simpler.

What was the background for thinking that AMD didn't support the same APIC 
addressing models? If there really is some issue external to the CPU's 
themselves, whatever problem was attributed to AMD might be the same (or 
similar) problem that Ananth had.

		Linus
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