/proc/bus/pci and domains

[Jesse Barnes]

On Thursday, February 14, 2008 1:40 am Martin Mares wrote:
> Hi Greg!
>
> > I have no idea, it sounds like a PPC specific thing, not anything the
> > PCI core does, right?  So I'll add the ppc list to the cc: and ask if
> > anyone there has any ideas?
>
> Unfortunately, this is not PPC specific at all -- proc_attach_device()
> calls pci_proc_domain(bus), which is an arch-specific hook turning on
> the weird behavior I described. This hook can return non-zero even on
> x86 if there are buses outside domain 0.
>
> I think that the hook itself is correct, it only should trigger more
> consistent behavior of the generic code :)
>
> Would it be acceptable for the PPC folks to modify the code to add
> domain numbers to the device numbers in /proc/bus/pci/devices in the
> same format as the bus directories already have?
>
> If so, I will cook up a patch.

I've run into this too, on machines with many domains.  It's unfortunate that 
there's no way to preserve compatibility, but I agree that the brokenness may 
as well be consistent.

Jesse