Messages in this thread | | | Date | Fri, 12 Sep 2003 20:22:16 +0200 | From | Adrian Bunk <> | Subject | Re: [PATCH] 2.6 workaround for Athlon/Opteron prefetch errata |
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On Fri, Sep 12, 2003 at 01:59:43PM -0400, Jeff Garzik wrote: > Andi Kleen wrote: > >The main reason I'm really against this is that currently the P4 kernels > >work > >fine on Athlon. Just when is_prefetch is not integrated in them there will > >be an mysterious oops once every three months in the kernel in prefetch > >on Athlon. > > > Booting a P4 kernel _without_ CONFIG_X86_GENERIC on an Athlon would be a > user bug.
But even CONFIG_X86_GENERIC doesn't do what you expect. A kernel compiled for Athlon wouldn't run on a Pentium 4 even with CONFIG_X86_GENERIC.
Quoting arch/i386/Kconfig in -test5:
<-- snip -->
config X86_USE_3DNOW bool depends on MCYRIXIII || MK7 default y
<-- snip -->
My patch in the mail
RFC: [2.6 patch] better i386 CPU selection
tries to solve these problem with a different approach (the user selects all CPUs he wants to support).
> Jeff
cu Adrian
--
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