Re: [Xen-devel] Interrupt forwarding

[Mark Williamson <maw48@xxxxxxxxxxxx>]

On Monday 14 March 2005 15:39, Ronald G. Minnich wrote:
> On Sat, 12 Mar 2005, Mark Williamson wrote:
> > I believe this problem is eliminated under PCI express, since interrupts
> > are message-based.
>
> I got corrected on this in the openib mailing list :-)
>
> the message signalled interrupts are even available on older hardware, it
> seems; sometimes but not always.

I'd seen they're available on some non-PCIE hardware.  I assumed it was just 
recent / high end hardware (maybe just on PCI-X).  (for instance, I think my 
workstation at Intel does use MSI interrupts and IIRC has PCI / PCI-X 
support).

Does anyone know to what extent MSI is actually used these days?

> That doesn't help much but it is interesting ...

Interesting indeed...

Cheers,
Mark


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