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

[Ingo Molnar <mingo@elte.hu>]

* Steven Rostedt <rostedt@goodmis.org> wrote:

> So it is probably stuck in some spinning "yield" loop, which was the 
> reason I was writing this test to begin with!  It's most likely also 
> waiting for kjournald to do some work, and is starving it in a 
> schedule or yield loop never actually going to sleep letting kjournald 
> do the real work.

actually, what priorities do the yielding tasks have? sched_yield() does 
not guarantee that the CPU will be given up, of if a highest-prio 
SCHED_FIFO task is in a yield() loop it will livelock the system.

	Ingo

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