Messages in this thread | | | Date | Fri, 27 May 2005 22:53:18 -0700 | Subject | Re: RT patch acceptance | From | Bill Huey (hui) <> |
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On Sat, May 28, 2005 at 02:43:30PM +1000, Nick Piggin wrote: > If you are talking about soft-RT, or things running on Linux today, > then sure they'll keep working. Even some or all of PREEMPT_RT may > be merged into the Linux guest too, for better soft-RT. I haven't > been arguing against that.
Hard RT guarantee are very possible, not in years, but months (possibly already) under constraints previously outlined.
[dual complexity issues snippeted]
> I agree we'll never have a fully functional hard-RT Linux kernel. > But this thread hasn't been about whether or not the RT task knows > what it is doing (we assume it does), but the possibility of making > more parts of the kernel able to provide some RT guarantee (ie. so > said RT task *can* use more functionality).
No sane RT app person is going to call into the kernel and expect guarantees in a general purpose system. Folks doing this kind of RT work will have at least a path that they can follow to *possibly* make this happen. It's all conjecture at the moment and it won't be known until somebody takes a shot at it and all associated kernel issues. It's most definitely a worthy project.
If this happens Linux would be an ideal kernel for digital video recorders and such.
bill
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