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To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Len Brown <lenb@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
       Pavel Machek <pavel@ucw.cz>, Ingo Molnar <mingo@elte.hu>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Nick Piggin <nickpiggin@yahoo.com.au>, Mingming Cao <cmm@us.ibm.com>,
       Adrian Bunk <bunk@stusta.de>, Andrew Morton <akpm@linux-foundation.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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       Oliver Pinter <oliver.pntr@gmail.com>,
       Sid Boyce <g3vbv@blueyonder.co.uk>, Nick Piggin <npiggin@suse.de>,
       Jens Axboe <jens.axboe@oracle.com>, Thomas Renninger <trenn@suse.de>
Subject: Re: [PATCH] i386: add command line option "local_apic_timer_c2_ok"
References: <Pine.LNX.4.64.0703160925270.26106@woody.linux-foundation.org>
	<20070326123141.GA11288@ucw.cz> <1174917142.4182.39.camel@chaos>
	<200703271719.25795.lenb@kernel.org>
	<Pine.LNX.4.64.0703271430310.6730@woody.linux-foundation.org>
From: Andi Kleen <andi@firstfloor.org>
Date: 29 Mar 2007 16:19:25 +0200
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Linus Torvalds <torvalds@linux-foundation.org> writes:

> On Tue, 27 Mar 2007, Len Brown wrote:
> > 
> > I think the only fool-proof way to do this automatically is to
> 
> Why not just take the known-good CPUID signature?

I didn't think we could reliably distingush mobile cpus with C2+ 
versus desktop CPUs without it. Or rather you would need a table
for each new CPU revision Intel/AMD put out. That would be probably
quite nightmarish to maintain.

-Andi