Re: Architecture baseline for Forky

Hi Bastian,

On Sun, 2025-10-26 at 13:21 +0100, Bastian Blank wrote:
> All other architectures use the default values.

What about riscv64, is that going to make the same switch as Ubuntu (RV23)?

And any plans for loong64 yet? The port is very mature these days and we ha=
ve
two beefy loong64 machines under the supervision of DSA. It's a very good
candidate for forky in my opinion.

> ## ppc64el
>=20
> * POWER8: Launched in 2014[^power8].
> * POWER9: Launched in 2017[^power9]. Used in RedHat 9[^redhat9] and
>   10[^redhat10].
>=20
> I propose to use the POWER9 baseline in Forky.  The Debian infrastructure=
 seems
> to be comprised of all POWER9s.  This means POWER8 will stop being suppor=
ted in
> 2028.

I think dropping POWER8 is a bit early given that POWER9 is just three year=
s younger.

> ## s390x
>=20
> * z14: Launched in 2017[^z14]. Used by RedHat 10[^redhat10].
> * z15: Launched in 2019[^z15]. Used by next Ubuntu.
>=20
> I propose to use the z15 baseline in Forky.  Yes, this is less then ten y=
ears,
> but s390 is such a niche architecture and all we do is best (often not ev=
en
> this) effort support.  The Debian infrastructure is documented to be at l=
east
> z15, all accesible system are actually z16.  This means that z14 and olde=
r will
> stop being support in 2028.

Do we have any sort of feedback what machines users run Debian's s390x port=
 on?

I would argue that both POWER and z-Series are hardware with very long supp=
ort
cycles by the manufacturer, so I think the baselines should be moved at a s=
lower
pace compared to x86_64 where acquiring new hardware also doesn't cost a fo=
rtune.

Thanks,
Adrian


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