Re: [PATCH] 2.6 workaround for Athlon/Opteron prefetch errata

[Bill Davidsen]

On Mon, 15 Sep 2003, John Bradford wrote:

    [... many good points ...]

> This makes it trivial to:
> 
> * Make a kernel for a distribution's initial install
>   Select all CPUs as supported, and optimise for 686.
> 
> * Make an optimised kernel for any system
>   Select only the target CPU as supported, and optimise for it
> 
> * Make a generic kernel for PIV, and Athlon
>   Select PIV and Athlon only as supported.  Optimise for either, or
>   optimise for 386, (yes, even though it is not supported), for a
>   small kernel, on the basis that it will maximise cache usage, and be
>   fairly optimal on both systems.

That last is a good point for sure, I have seen several posts indicating
that -Os is faster on small cache machines like old Celerons, it would be
a sensible choice for a distro, and make the kernel smaller as well.
Kernels are getting near the limits of some machines to boot them.

-- 
bill davidsen <davidsen@xxxxxxx>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/