Re: [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.43-00

Steven Rostedt
2005-04-04T21:34:34Z

On Mon, 2005-04-04 at 22:47 +0200, Ingo Molnar wrote:

> > Currently my fix is in yield to lower the priority of the task calling
> > yield and raise it after the schedule. This is NOT a proper fix. It's
> > just a hack so I can get by it and test other parts.
>
> yeah, yield() is a quite RT-incompatible concept, which could livelock
> an upstream kernel just as much - if the task in question is SCHED_FIFO.
> Almost all yield() uses should be eliminated from the upstream kernel,
> step by step.

Now the question is, who will fix it? Preferably the maintainers, but I
don't know how much of a priority this is to them. I don't have the time
now to look at this and understand enough about the code to be able to
make a proper fix, and I'm sure you have other things to do too.

-- Steve