On Wed, 6 Jun 2018, at 2:38 AM, Dennis Gilmore wrote:
> El mar, 05-06-2018 a las 15:59 -0400, Adam Jackson escribió:
> > On Tue, 2018-06-05 at 13:20 -0500, Dennis Gilmore wrote:
> >
> > > as part of this change I suspect we would need to make kernel
> > > changes
> > > to stop building a i686 kernel, and all i686 deliverables would
> > > stop
> > > being made.
> >
> > We would?
> It may be a bad assumption on my part, I am assuming that optimising to
> run on x86_64 means that we will not be able to run on any actual
> x86_32 hardware.
>
> Dennis
>
The optimisation proposed here wouldn’t technically prevent running on P4 systems or the atoms that have been mentioned, as I understand it. These systems would still benefit from a 32-bit kernel.
For reference, the last CPU I used that didn’t have SSE2 support was an Athlon XP - introduced to compete with the P4 but actually had the instruction set of a PIII more or less. I remember this because I tried to run OpenSolaris on it. Which even about 15 years ago, required SSE2
How about instead of proposing to drop support for anything not using x86-64 this was pushed as a proposal to stop supporting anything that doesn’t do SSE2 (which seems to be the actual proposal) - does it sound any different now?
To me, it does - because I’d suspect P4 and some Atom chips covers quite a range of hardware that people still use.
Whether it’s worth running such a P4 machine nowadays is another question of course, given how power hungry they are for not much compute power...
To me? It’s perhaps worth dropping non-SSE2 support but i wouldn’t stop building kernels for 32-bit
Michael
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