Re: [Xen-devel] PCI pass-through / MSI question: Is 30(hex) the lower limit for pirq?

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, May 28, 2010 at 08:30:40AM +0100, Jan Beulich wrote:
> >>> On 28.05.10 at 01:29, Dante Cinco <dantecinco@xxxxxxxxx> wrote:
> > I'm trying to bring up a Windows domU with PCI pass-through and it looks
> > like Xen is running out of pirqs (see log below). I'm using Xen 4.0.0 and
> > dom0 2.6.32.12 pv-ops and pci-stub to hide the PCIe device.
> > 
> > It looks like the first available pirq is 4e(hex) and the last available is
> > 30(hex) and after that, Xen returns an msix error. What's the consequence of
> > running out of pirqs?
> 
> Did you try the extra_guest_irqs= Xen command line option to
> increase the number of PIRQs (defaulting to 32) for the guest?
> 

I added this xen.gz option to:
http://wiki.xensource.com/xenwiki/XenHypervisorBootOptions

-- Pasi


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