eieio rule-of-thumb?

[Dan Malek]

benh at kernel.crashing.org wrote:


> Regarding eieio on uncached, Paul or Anton can tell you more about it,
> I think there is still a case where guarded doesn't prevent a load
> from moving accross a store.

Oh right....You get guarded to prevent out of order loads, and I just
get lucky that the uncached store doesn't cross the load.

> Regarding the bridge,...

OK.  I thought that was a PCI master, memory controller thing, not
something that would happen from a CPU programmed I/O.


> I think it is on desktop CPUs, but again, here, Paul and Anton have more
> knowledge than I do.

Right.  I know I found a couple of things we had to update for the 74xx
processors.

Thanks.


	-- Dan


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