On Thu, Dec 05, 2002 at 06:49:10PM +0100, Manfred Spraul wrote:
> >
> >
> >Hmm... that doesn't seem sufficient to explain it.
> >
> >Some background: I work with PPC embedded chips (the 4xx family) whose
> >only way to get consistent memory is by entirely disabling the cache.
> What do you mean with "disable"?
> Do you have to disable the cache entirely when you encounter the first
> pci_alloc_consistent() call, or do you disable the cache just for the
> region that is returned by pci_alloc_consistent()?
Just for the region - it is an attribute in the PTE.
-- David Gibson | For every complex problem there is a david@gibson.dropbear.id.au | solution which is simple, neat and | wrong. http://www.ozlabs.org/people/dgibson - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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