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DateTue, 24 May 2005 11:02:40 +0200
FromIngo Molnar <>
SubjectRe: RT patch acceptance

* Nick Piggin <nickpiggin@yahoo.com.au> wrote:

> Oh OK, I didn't realise it is aiming for hard RT. Cool! but
> that wasn't so much the main point I was trying to make...
>
> >so it's well worth the effort, but there's no hurry and all the changes
> >are incremental anyway. I can understand Daniel's desire for more action
> >(he's got a product to worry about), but upstream isnt ready for this
> >yet.
> >
>
> Basically the same questions I think will still be up for debate. Not
> that I want to start now, nor do I really have any feelings on the
> matter yet (other than I'm glad you're not in a hurry :)).

i expect it to be pretty much like voluntary-preempt: there was much
flaming 9 months ago and by today 99% of the voluntary-preempt patches
are already in the upstream kernel and the remaining 1% (which just adds
the config option and touches one include file) i didnt submit yet.

so i dont think there's much need to worry or even to decide anything
upfront: the merge is already happening. The two biggest preconditions
of PREEMPT_RT, the irq subsystem rewrite, and the spinlock-init API
cleanups are already upstream. The rest is just details or out-of-line
code. The discussions need to happen in small isolated steps, as the
component technologies are merged and discussed. The components are all
useful even without the final PREEMPT_RT step (which further proves the
usefulness of PREEMPT_RT - but you dont have to agree with that global
assertion).

So i'm afraid nothing radical will happen anywhere. Maybe we can have
one final flamewar-party in the end when the .config options are about
to be added, just for nostalgia, ok? =B-)

Ingo
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