Date: Sun, 4 Jan 2004 22:55:41 +0100
From: Vojtech Pavlik <vojtech@suse.cz>
To: Valdis.Kletnieks@vt.edu
Cc: Rob Love <rml@ximian.com>, linux-kernel@vger.kernel.org
Subject: Re: Pentium M config option for 2.6
Message-ID: <20040104215541.GB14982@ucw.cz>
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On Sun, Jan 04, 2004 at 03:34:47PM -0500, Valdis.Kletnieks@vt.edu wrote:
> On Sun, 04 Jan 2004 11:33:08 EST, Rob Love said:
> 
> > I actually like this patch (perhaps since I have a P-M :) and think it
> > ought to go in, although I agree with others that the P-M is more of a
> > super-P3 than a scaled down P4.
> 
> Same here - /proc/cpuinfo says:
> 
> vendor_id       : GenuineIntel
> cpu family      : 15
> model           : 2
> model name      : Intel(R) Pentium(R) 4 Mobile CPU 1.60GHz
> 
> Question for those more knowledgeable: Are there any known Pentium4 features
> enabled in the kernel with the PENTIUM4 options that simply Will Not Work on a
> 4M chipset (similar to a kernel built for a 586 not working on a 486), or are
> the differences limited to "sub-optimal performance" (for example, compiling
> with -mpentium4 results in code that runs but schedules less optimally)?  If
> there are, they must be fairly obscure corner cases, since I haven't knowingly
> hit one in several months.. :)
> 
> 2.7 timeframe - are there any added features of a P4 core we would *like*
> to exploit that aren't on a P4M?

Pentium 4M is a real Pentium 4 core, but with mobile features.

Pentium M is a beefed up Pentium III core, with mobile features and all
		Pentium 4 extra features (instructions, etc).

I think that answers your question.

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR
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