Re: [Xen-ia64-devel] vIOSAPIC and IRQs delivery

[Tristan Gingold <Tristan.Gingold@xxxxxxxx>]

Le Jeudi 09 Mars 2006 01:31, Luck, Tony a écrit :
> >BTW, I think it will be *very* hard to find an ia64 platform which can
> > share an IRQ line.  Maybe I am wrong but I don't know such a platform :-(
>
> Hard? No.
I'd like to have a vendor name and a platform name!

> Expensive? Yes.
>
> There are only 255 irqs - minus some that the base kernel steals
> for cmc, mca, timer, perfmon, etc.  So any large system with a
> few hundred i/o cards _must_ share irqs.  There aren't enough
> for one each.
I don't agree.  You can have interrupt domains.  See "Intel Itanium Processor 
Family Interrupt Architecture Guide".

Tristan.


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