Message-Id: <200401042034.i04KYm1P024587@turing-police.cc.vt.edu>
To: Rob Love <rml@ximian.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Pentium M config option for 2.6 
In-Reply-To: Your message of "Sun, 04 Jan 2004 11:33:08 EST."
             <1073233988.5225.9.camel@fur> 
From: Valdis.Kletnieks@vt.edu
References: <200401041227.i04CReNI004912@harpo.it.uu.se> <1073228608.2717.39.camel@fur> <20040104162516.GB31585@redhat.com>
            <1073233988.5225.9.camel@fur>
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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?

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