Re: subarchitectures and RISC-V, was Re: F39 proposal: RPM 4.19 (System-Wide Change proposal)

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On 4/15/23 00:25, David Abdurachmanov wrote:
On Sat, Apr 15, 2023 at 7:08 AM Jeff Law <jeffreyalaw@xxxxxxxxx> wrote:



On 4/14/23 20:14, Neal Gompa wrote:



We should not screw up with RISC-V in Fedora like RHEL did with ARM.
Yes, I'm saying RHEL's ARM strategy was a mistake, and still is, to
some degree. We see aspects of this being walked back now as the
ecosystem didn't go the way RHEL ARM folks hoped, and breaking further
into that ecosystem requires reversing some of those choices. We
should learn from that for Fedora RISC-V.
Well, the RHEL direction was essentially mandated by the markets vendors
were chasing.  Plain and simple.  You may say RHEL's ARM strategy was a
mistake, but I'd disagree strongly.

Fedora != CentOS Stream or/and RHEL.
I am *well* aware. I wouldn't have brought RHEL into the discussion at all if Neal hadn't ;-)


I am gonna repeat myself. I doubt there will be a need to support
anything below RVA23 in CentOS Stream. That of course would mean that
existing (or near future, yet to be announced) SBCs wouldn't be able
to run it.
Agreed. It's hard to see a case where anyone that wants Centos on RVA20. RVA23 is a much more realistic target.



That's already happened.  Stratification was inevitable given the RISC-V
model.  The only questions in my mind are viability in the server space
and whether or not that could one day lead to offerings between server
class and the SBC systems.

Brings high-performance (and yet cheap) SBCs that it's fully compliant
is too expensive today (i.e. you would lose money doing it [personal
opinion]). It's going to happen, it's most likely coming from the
Chinese market [personal opinion].
You're probably right on all those points.



I could say that Ubuntu is the dominating distribution for RISCV SBCs.
Canonical engineering resources and willingness to support pretty much
every SBC (but with vendor kernel or/and firmware) is really hard to
compete with. If you want to get the best out-of-the-box experience on
your RISCV SBCs definitely Ubuntu is #1 suggestion, but that wasn't
the case for many years. Ubuntu came to RISCV land very late (I would
say somewhat recently), but now should be dominating (no way to
confirm). Nice work by the Ubuntu community and Canonical engineers.
They truly want to support every piece of hardware available out
there.
Agreed. And one can certainly question the sanity and business model of supporting all those SBCs. But if you look beyond the SBC space, Ubuntu has positioned themselves well to be the distro of choice for aspiring server platforms. One might even look at the SBC engagement as really just positioning themselves for the future (speculation on my part).

Ubuntu may have come late, but they're engaged at a level that the Fedora community isn't even close to matching.

Jeff
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