Re: Fedora 33 System-Wide Change Proposal: ELN Buildroot and Compose V4

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On Tue, Apr 7, 2020 at 3:10 AM Tom Hughes via devel
<devel@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> On 06/04/2020 22:53, Stephen Gallagher wrote:
>
> > Changes in this version of the proposal[2]:
> >
> > * Improve our explanation of why we are doing ELN in the first place
>
> I agree that the proposal is now a lot clearer and I certainly see
> how it furthers the first goral of seeing how Fedora trunk comes
> together asn an EL build, modulo one concern below.
>
> I don't understand how it helps evaluate something like a new
> higher CPU baseline - nobody disputes that packages can be built
> to a new baseline which is what this would prove. The argument
> is about the effect on consumers of such a baseline and about
> what proportion of users/machines would be cut off from further
> upgrades and this proposal does nothing to help with that.

As to what proportion of users/machines would be cut off, we don't
care about the exact number.   It was already established that the
number is an unacceptable amount.  The real question is, how much of a
performance advantage do modern machines get from running things built
for such a baseline.  If there is a significant advantage, then it
becomes worthwhile to explore methods to make relevant packages built
to such a baseline available in standard Fedora.  There have been
various ideas on how to make them available without making them a
required minimum, but all of them involve a non-trivial amount of
work.  It would be a waste of time and energy if the real world
advantage turns out to be minimal.
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