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    SubjectRe: Pentium M config option for 2.6
    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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