Arjan van de Ven wrote:
> On Thu, 2005-12-15 at 00:13 +0300, Al Boldi wrote:
> > Greg KH wrote:
> > > For people to think that the kernel developers are just "too dumb" to
> > > make a stable kernel api (and yes, I've had people accuse me of this
> > > many times to my face[1]) shows a total lack of understanding as to
> > > _why_ we change the in-kernel api all the time. Please see
> > > Documentation/stable_api_nonsense.txt for details on this.
> >
> > I read this doc, and it doesn't make your case any clearer, on the
> > contrary!
> >
> > But first, your work to the kernel represents a not so dumb
> > contribution, especially the replacement of devfs. Thanks!
> >
> > Now, to call a stable api nonsense is nonsense. Really, only a _stable_
> > api is worth to be considered an API. Think about it.
>
> a stable api/abi for the linux kernel would take at least 2 years to
> develop. The current API is not designed for stable-ness, a stable API
> needs stricter separation between the layers and more opaque pointers
> etc etc.
True. But it would be time well spent.
> There is a price you pay for having such a rigid scheme (it arguably has
> advantages too, those are mostly relevant in a closed source system tho)
> is that it's a lot harder to implement improvements.
This is a common misconception. What is true is that a closed system is
forced to implement a stable api by nature. In an OpenSource system you can
just hack around, which may seem to speed your development cycle when in
fact it inhibits it.
> Linux isn't so much designed as evolved, and in evolution, new dominant
> things emerge regularly. A stable API would prevent those from even coming
> into existing, let alone become dominant and implemented.
GNU/OpenSource is unguided by nature. A stable API contributes to a guided
development that is scalable. Scalability is what leads you to new heights,
or else could you imagine how ugly it would be to send this message using
asm?
Thanks!
--
Al
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