Re: [PATCH] Support worst case cache line sizes as config option

[Andi Kleen]

On Mon, Apr 28, 2003 at 11:16:16AM +0200, Adrian Bunk wrote:
> Your X86_GENERIC is semantically equivalent to M386.

M386 is tuning for the Intel 386

X86_GENERIC is "try to tune for all CPUs if possible" 

> This doesn't work. E.g. MPENTIUMIII has the semantics of "support 
> Pentium-III and above". If you want to compile a kernel that runs on 
> both a Pentium-III and a Pentium-4 you choose MPENTIUMIII which implies 
> X86_L1_CACHE_SHIFT=5 ...

Admittedly the other options could be changed to 

default "4" if (MELAN || M486 || M386) && !X86_GENERIC

but that looked a bit too ugly and it seems to work even without.

-Andi