Re: struct page to 36 (or 64) bit bus address?

[Andrea Arcangeli]

On Thu, Aug 09, 2001 at 04:35:32PM -0400, Johannes Erdfelt wrote:
> It's not a big deal. It's just less efficient which isn't the end of the
> world.

It's not only less efficient, your machine is going to crash as soon as
you ask the iommu to map some giga of ram with the current state of
drivers (the API says that if you get null out of the map call you
should fallback, but no driver checks for this null retval and so in
turn they're all prone to crash, not going to be fixed in 2.4 I guess).
So try to reduce as much as possible the number of simultaneous pci
mappings and it will probably not crash.

Andrea