Re: [Lse-tech] [RFC][PATCH] Change pcibus_to_cpumask() to pcibus_to_node()

[Matthew Dobson <colpatch@us.ibm.com>]

On Wed, 2004-07-28 at 08:01, Martin J. Bligh wrote:
> >> I wonder though if we shouldn't add
> >> 
> >>   ...
> >> # ifdef CONFIG_NUMA
> >>   int node; /* or nodemask_t if necessary */
> >> # endif
> >>   ...
> >> 
> >> to struct pci_bus instead?  That would make the existing code paths a little 
> >> faster and avoid the need for a global array, which tends to lead to TLB 
> >> misses.
> > 
> > I like that idea!  Stick a nodemask_t in struct pci_bus, initialize it
> > to NODE_MASK_ALL.  If a particular arch wants to put something more
> > accurate in there, then great, if not, we're just in the same boat we're
> > in now.
> > 
> > Anyone else have opinions one way or the other on Jesse's idea?
> 
> Sounds great - if it's possible to add it to something more generic than
> PCI, that'd be even better, but pci would still be very useful.
> 
> M.

Is there anything like that?  I'm not aware of any structure that keeps
track of general "buses", which would be what we want.  Something that
keeps track of PCI buses, Infiniband buses, arch-specific fabric buses,
etc.  Barring the existence of such a structure, I'll just shove it in
the PCI bus structure for now.

-Matt