Re: [RFC 0/4] dynamically allocate arch specific system vectors

[Ingo Molnar]

* Dean Nelson <dcn@xxxxxxx> wrote:

> > while i understand the UV_BAU_MESSAGE case (TLB flushes are 
> > special), why does sgi-gru and sgi-xp need to go that deep? They are 
> > drivers, they should be able to make use of an ordinary irq just 
> > like the other 2000 drivers we have do.
> 
> The sgi-gru driver needs to be able to allocate a single irq/vector 
> pair for all CPUs even those that are not currently online. The sgi-xp 
> driver has similar but not as stringent needs.

why does it need to allocate a single irq/vector pair? Why is a regular 
interrupt not good?

	Ingo
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