Re: periods and deadlines in SCHED_DEADLINE

[Peter Zijlstra]

On Fri, 2010-07-09 at 15:38 +0200, Raistlin wrote:
> 
> Therefore, here it is my proposal:
>  - if the programmer specify both period and deadline, I act as above,
>    running the _only_necessary_ test in the kernel, assuming that
>    userspace performed some other kind of (correct!) admission test by
>    its own, or that it is cool with missing some deadlines... What do
>    you think?

It would be good to provide room in the interface to improve upon this
situation.

One thing we could do, although this would make the proposed scheduler a
wee bit more complex, is split between hard and soft realtime. Only
accept P==rel_D for hard, and schedule the soft tasks in the hard slack
or something like that.

That way we can later extend the hard admission tests to accept more.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/