Re: [PATCH] 2.3.49 Configure.help processor patch

From: Andrzej Krzysztofowicz (kufel!ankry@green.mif.pg.gda.pl)
Date: Sat Mar 04 2000 - 14:15:42 EST


> Attached is a Configure.help patch for 2.3.49 for the processor
> selection section. I doubt it's complete, but it's a start. At
> least the options are represented correctly.

Some more comments here:

>
> - If you specify one of "486" or "586" or "Pentium" or "PPro", then
> - the kernel will not necessarily run on earlier architectures (e.g. a
> - Pentium optimized kernel will run on a PPro, but not necessarily on
> - a i486).
> + If you specify anything other than 386, then the kernel the kernel
                                                   ^^^^^^^^^^^^^ duplicated
> + will not necessarily run on earlier architectures (e.g. a Pentium
> + optimized kernel will run on the newer PPro, but not necessarily on
> + the older i486).
>
> Here are the settings recommended for greatest speed:
> - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
> 486DLC/DLC2 and UMC 486SX-S. Only "386" kernels will run on a 386
> class machine.
> - - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
> + - "486/Cx486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
> SL/SLC/SLC2/SLC3/SX/SX2, AMD/Cyrix 5x86, NexGen Nx586 and
> UMC U5D or U5S.
> - - "586" for generic Pentium CPUs, possibly lacking the TSC
> + - "586/K5/5x86/6x86" for the Intel Pentium/Pentium MMX, AMD K5 and
> + generic 5x86 and 6x86.
> + - "Pentium/TSC" for generic Pentium CPUs, possibly lacking the TSC
> (time stamp counter) register.
You reversed these options meaning! Pentium/TSC is for Pentium/Pentium
MMX with TSC support.
AMD K5 does not support TSC...

> - - "Pentium" for the Intel Pentium/Pentium MMX, AMD K5, K6 and
> - K6-3D.
> - - "PPro" for the Cyrix/IBM/National Semiconductor 6x86MX, MII and
> - Intel Pentium II/Pentium Pro.
> + - "K6/II/III" for AMD K6, K6-3D, K6-II and K6-III
> + - "PPro/6x86MX" for the Cyrix/IBM/National Semiconductor 6x86MX, MII
> + and Intel Pentium II/Pentium Pro.
> + - "Athalon" for AMD Athalon.

-
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