Messages in this thread | | | Date | Mon, 15 Sep 2003 22:55:23 +0200 | From | Adrian Bunk <> | Subject | Re: [PATCH] 2.6 workaround for Athlon/Opteron prefetch errata |
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On Mon, Sep 15, 2003 at 07:32:49AM +0100, John Bradford wrote: >... > It should be possible, and straightforward, to compile a kernel which: > > 1. Supports, (I.E. has workarounds for), any combination of CPUs. > E.G. a kernel which supports 386s, and Athlons _only_ would not > need the F00F bug workaround. Currently '386' kernels include it, > because '386' means 'support 386 and above processors'. > > 2. Has compiler optimisations for one particular CPU. > E.G. the 386 and Athlon supporting kernel above could have > alignment optimised for either 386 or Athlon. >...
That's the point where even I consider such a system to be too complex.
If you want maximum performance compile a kernel specific for your system.
Compiling a kernel that supports more than one CPU is for people that can even live with let's say a 10% performance penalty.
If you want to run a kernel on both a 386 and an Athlon it's most likely non-optimal for both of them.
> John.
cu Adrian
--
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