Re: [PATCH] sched/deadline: Add sched_dl documentation

From: Steven Rostedt
Date: Tue Jan 21 2014 - 11:28:47 EST

On Tue, 21 Jan 2014 14:55:59 +0100
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> > >I would strongly urge you not to use that as an example, because its
> > >dead wrong design. An RT thread (be it RR,FIFO or DL) should _NEVER_ do
> > >blocking IO.
> > Well, but it does happen in reality :)
> Yeah, I know, my point was more about not encouraging people to do this
> by explicitly mentioning it.

Unless it is mentioned that this is fine for soft real-time uses, such
as what Luca described (mplayer and possibly Jack). Tools where missing
a deadline does not crash the system, but just reduces quality.

-- Steve
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