Re: x86_64-v2 in Fedora

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On Tue, Jun 15, 2021 at 05:34:02PM -0400, Neal Gompa wrote:
> Hey all,
> 
> Earlier this week, I was helping with processing features for openSUSE
> Leap 15.4[1] and I discovered that they're planning on introducing
> x86_64-v2 to openSUSE soon. The reference for this change was that
> RHEL 9 is going to use x86_64-v2[2]. Additionally, other distributions
> have been considering bumping up to v2 or v3[3][4].
> 
> Some cursory examination of the new x86_64 sublevels seem to indicate
> that x86_64-v2 goes back to roughly 2007~2008, merely cutting off the
> first couple of generations of x86_64 CPUs from Intel and AMD. I
> personally don't have any computers that don't have support for
> x86_64-v2 anymore.

Yes, you loose primarily Intel Conroe and Penryn generations and
AMD Opteron Gen 1 -> Gen 3. I doubt this is a significant portion
of Fedora installs.

Slight tangent but I find Fedora's approach to hardware somewhat
at odds with our approach to software.

On the one hand we portray our project as a place for cutting
edge Linux software & innovation.

On the other hand we hold back our software by trying to keep
supporting long obsolete hardware.

There is of course always a balance between bumping min hardware
specs and the impact on maintainers & users, but I'm not convinced
that we have the balance right in targeting our x86_64 baseline at
the very first generation of 64-bit CPUs from 15 years ago. I can't
imagine such old CPUs makes up a significant portion of our users.

Regards,
Daniel
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