Re: [patch] Real-Time Preemption, plist fixes

[Daniel Walker]

On Mon, 6 Jun 2005, Ingo Molnar wrote:

> 
> * Daniel Walker <dwalker@xxxxxxxxxx> wrote:
> 
> > 	For me it's strictly a speed question. I was reviewing 
> > V0.7.40-04 and it looks like apples and oranges to me. It's more a 
> > question of where do you perfer the latency , in up() or in down() .. 
> > plist is slower for non-RT tasks, but non-RT tasks also get the 
> > benefit of priority ordering.
> 
> what benefit do non-RT tasks get from plists, compared to the ordered 
> list? Non-RT tasks are not PI handled in any way.

The original wait list was partial ordered, wasn't it? RT tasks on the 
front, non-RT at the back. Now the whole list is sorted (including non RT 
tasks) . So non-RT task will get the lock in priority sorted order, as 
opposed to just random. Like you said, there is no PI done.


Daniel

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