Re: [0/4] NUMA-Q: remove PCI bus number mangling

Martin J. Bligh
2002-11-12T22:53:35Z

>>> Also, every PCI bridge in my box has a bus number of 3 so the lookup
>>> table will produce wrong answers every time.
>
> On Tue, Nov 12, 2002 at 02:46:29PM -0800, Martin J. Bligh wrote:
>> Isn't that the local bus number though? The topology functions take
>> global bus numbers, which should be unique ...
>> M.
>
> That bus number mangling scheme is an instance of an approach vetoed
> over a year ago by Dave Miller and others, and does not work for bridges
> because arch code does not get the opportunity to mangle the bus number
> during bridge discovery.

Right, I'm not against the sysdata thing, seems like a much better way
to do it in general (what I did was a quick hack). Was just confused
by the global bus number assertion, but if we use the sysdata stuff,
it's all a non-issue ;-)

M.