On Fri, Jan 10, 2020 at 2:37 PM Chris Adams <linux(a)cmadams.net> wrote:
Once upon a time, Aleksandra Fedorova <alpha(a)bookwar.info> said:
> The rejected change
> is explicitly referenced from the current one. So yes, it is the
> architecture update we are looking for.
> And I would suggest to avoid calling things weird and crazy just
> because you are not interested in them.
The premise of the new change request is to ignore all the issues that
led to the original change request being rejected, and just assume that
the original will be accepted in the near future.
No. Afaik, the main reason the change was rejected is that we are not
ready yet (or don't see yet the reason) for the update of the
architecture. And the benefit of such an update is unclear.
Thus we design this change to be explicitly standalone with no impact
on the current Fedora release. We want to have a separate test
environment where we can experiment with the architecture updates
(compiler flag changes and new features). This test environment is
needed to preview and test the changes ahead of time.
So that in next years, when (and I do believe that there will be such
moment, while it might be that the final configuration flags will be
different from those proposed right now) we decide to update the
baseline, we have much better understanding on what changes are needed
and which benefits we can get from it, and we don't have to squeeze
them into one single mass rebuild in one particular moment in the
AVX2 is not a reasonable requirement as a replacement for the
Fedora x86_64, as there are CPUs still being made today that don't
support that. If you want to split x86_64 (along the lines of i386 vs.
i686), then building a shadow copy of the entire distribution is not a
good way forward - you need to do all the actual work required to make a
second x86_64 sub-architecture in the main x86_64 distribution. Come up
with a name, make the changes to the required packages, etc.
Otherwise, what is the point of the shadow architecture? What is the
end goal? Build it in perpetuity and just try to get people to run your
packages instead of the main distribution?
There is no intent to provide those packages to the regular user or
make a separate Fedora Edition out of them. There will be no releases
of repositories or media with such packages. It is only an
experimental test environment linked to the Fedora Rawhide state.
The end goal of this is not to add new architecture but to have a
possibility to move actual Fedora configuration forward, without
breaking it. Which means preparing and testing changes as close as
possible to Fedora mainline, but without disrupting it.
Chris Adams <linux(a)cmadams.net>
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