Re: PREEMPT_RT & threading IRQ 0

[Ingo Molnar]

* Lee Revell <rlrevell@xxxxxxxxxxx> wrote:

> Ingo, what's the status of putting irq 0 back in a thread with 
> PREEMPT_RT?  IIRC this had some adverse (maybe unfixable?) effects so 
> it was disabled a few months ago.

the jury is still out on that one - but right now it seems it's too much 
complexity for a handful of usecs of latency improvement. Especially 
with things like high-resolution timer support, the threading IRQ0 
doesnt seem to be worth it.

	Ingo
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