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Changes coming for systemd and control groups

Changes coming for systemd and control groups

Posted Jun 24, 2013 5:29 UTC (Mon) by mjg59 (subscriber, #23239)
In reply to: Changes coming for systemd and control groups by russell
Parent article: Changes coming for systemd and control groups

Evolution does not inherently imply diversity.


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Changes coming for systemd and control groups

Posted Jun 24, 2013 8:20 UTC (Mon) by ebiederm (subscriber, #35028) [Link]

Please let's not suggest domineering abuse on lwn.

Changes coming for systemd and control groups

Posted Jun 24, 2013 12:46 UTC (Mon) by Karellen (subscriber, #67644) [Link]

How do you propose that evolution can occur without diversity? How can you discard the "less-fit" and retain the "more-fit" variations, if there is no variation?

Changes coming for systemd and control groups

Posted Jun 24, 2013 16:54 UTC (Mon) by dlang (subscriber, #313) [Link]

They are convinced that they have the end-all-be-all solution, so there is not going to be any need to ever have anything different (either at the kernel level or at the 'low level system, i.e. systemd' level

Changes coming for systemd and control groups

Posted Jun 24, 2013 23:04 UTC (Mon) by marcH (subscriber, #57642) [Link]

> How do you propose that evolution can occur without diversity?

One gene mutation or refactoring at a time.

Changes coming for systemd and control groups

Posted Jun 24, 2013 23:17 UTC (Mon) by dark (guest, #8483) [Link]

That's not evolution, that's intelligent design :)

Changes coming for systemd and control groups

Posted Jun 26, 2013 15:44 UTC (Wed) by Karellen (subscriber, #67644) [Link]

Right, but then you have diversity between the original allele/factoring and the new one.

If the old variation is fitter, the new one dies out/is ignored. If the new one is fitter, the old one dies out/is discarded. If they are equally fit, they both spread throughout the population.

(Note, "fitness" is a wide-ranging property. With regards to code changes, if two variants are equally performant and equally simple, then one might be "more fit" simply because it is more widely adopted, and minimising the set of patches you have to others increases the "fitness" of your tree.)

Changes coming for systemd and control groups

Posted Jun 27, 2013 17:42 UTC (Thu) by marcH (subscriber, #57642) [Link]

I think the misunderstanding is in the definition of "diversity". Where does it start?

Changes coming for systemd and control groups

Posted Jun 28, 2013 1:49 UTC (Fri) by jschrod (subscriber, #1646) [Link]

> If the old variation is fitter, the new one dies out/is ignored. If the
> new one is fitter, the old one dies out/is discarded. If they are equally
> fit, they both spread throughout the population.

Arrggghhhh!

That's not evolution, that's social-darwinistic misinterpretation of evolution.

In nature, something doesn't die out because there's an other species that's "more fit". If that were the case, we wouldn't have so many species on earth. A species dies out if it is _not fit enough_ to adapt to changing environmental circumstances (which might be the pressure of other inhabitants of that environment, but that's seldom the case).

Selection does *not* mean only the fittest survive. It means the unfit-to-adapt die.

Changes coming for systemd and control groups

Posted Jun 25, 2013 0:14 UTC (Tue) by rgmoore (✭ supporter ✭, #75) [Link]

The evolution moves to a different part of the stack.

Changes coming for systemd and control groups

Posted Jun 27, 2013 2:43 UTC (Thu) by russell (guest, #10458) [Link]

OK let's look at a more mathematical analogy. Lack of diversity is the fastest way to a local minima not a global minima and not an optimal solution.

Changes coming for systemd and control groups

Posted Jun 28, 2013 11:23 UTC (Fri) by dgm (subscriber, #49227) [Link]

Almost. Reducing diversity takes you faster _somewhere_. It could be a local minima if you are lucky (or live in a bumpy world), but it needs not be. If you happen to take the wrong path, then lack of diversity is the fastest way to catastrophe.


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