Re: Ingo's realtime_preempt patch causes kernel oops

[Daniel Walker]

>  Would IRQs stay masked until the thread has finished running?
> 
> I would say yes.  But the system is basically broken if you have the
> same interrupt line that needs both to be threaded and NODELAY.

It's certainly less than and ideal situation .. If set an interrupt as
SA_NODELAY you'd think that it's suppose to be high priority , but then
you share it with something that's not high high priority which doesn't
make a lot of sense ..

However, the PCI bus doesn't (as far as I know) allow for interrupts to
easily be isolated .. So, with PCI, you may end up with potentially high
priority interrupts shared with some other interrupt .. So it is a
situation that could happen, maybe even often .

Daniel

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