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From: NeilBrown <neilb@suse.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 11 Aug 2017 18:02:23 +1000
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Subject: Re: [Ksummit-discuss] [MAINTAINER TOPIC] ABI feature gates?
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On Thu, Aug 10 2017, Linus Torvalds wrote:

> On Thu, Aug 10, 2017 at 11:21 PM, NeilBrown <neilb@suse.com> wrote:
>>
>> With this pattern, people can still trust an X.Y kernel,
>
> I do *NOT* want people to trust an X.Y kernel.
>
> Quite the opposite.
>
> I want people to realize that the version doesn't matter, and that
> they should feel safe in upgrading. The X and the Y don't matter, and
> they *MUST*NOT*MATTER*.
>
> If they do, the process is completely and utterly broken.
>
> So what people should be able to trust is that they can always upgrade.

What do you mean by "upgrade"?
Can I upgrade from 3.15 to 3.16-rc1?  If not, why not?

NeilBrown


>
> Not the shit that I see *ALL* the time, where you upgrade something,
> and it breaks.
>
> And no, the excuse "but the API was new in X.Y, so it could change in
> X.Y+1" does *not* hold water.
>
> It very much violates that basic principle of trust and makes people
> go "I don't want to upgrade, because it might break something I do".
>
>                     Linus

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