Starting the arch/powerpc merge

Giuliano Pochini pochini at
Thu Sep 29 17:20:52 EST 2005

On 28-Sep-2005 Benjamin Herrenschmidt wrote:
> On Tue, 2005-09-27 at 18:30 +1000, Paul Mackerras wrote:
>> Christoph Hellwig writes:
>> > What about just dropping POWER3/4 support in 32bit mode?
>> Yes... I'm getting very close to deciding to do that.  In fact POWER3
>> isn't too bad, since it still has BATs, but POWER4/PPC970 would be
>> tricky.
>> Does anyone on these lists have any major objections if we drop
>> support for 32-bit kernels on POWER3 and POWER4/PPC970?
> I've stopped supporting G5 on 32 bits kernel for some time now, I have
> absolutely no problem just dropping the POWER4 support in 32 bits kernel
> in the merged tree.

Out of curiosity, is there any advantage in using a 32 bits
kernel on ppc64 over a 64 bits kernel ?  Speed ?  Complexity ?
Compatibility ?  Memory ?


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