Re: low priority soft RT?

Marc Lehmann (pcg@goof.com)
Tue, 27 Jul 1999 22:42:19 +0200

On Tue, Jul 27, 1999 at 04:04:12PM +0200, Rik van Riel <riel@humbolt.nl.linux.org> wrote:
>
> Unfortunately, we showed him he was wrong and the deadlock
> could still happen with normal timeslicing processes and
> RT tasks...
>
> SCHED_IDLE adds nothing new and has just as little chance

At least HP-UX and IRIX had this for a long time.

BTW, how about enhancing the patch to allow a similar behaviour as
other unixen, i.e. being able to attach a priority to these SCHED_IDLE
processes?

Under IRIX (for example) SCHED_OTHER processes run at a priority thats about
in the _middle_ of the SCHED_FIFO priority range, i.e. you can have
SCHED_FIFO processes with lower priority than normal tasks.

It's also fully POSIX compliant, btw ;)

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