On Mon, 11 Jun 2007, Arjan van de Ven wrote:

> the problem with that is that if anything downstream from the iommu layer ALSO
> needs memory, we've now eaten up the last free page and things go splat.

Hmmm... We need something like a reservation system right? Higher levels 
in a atomic context could register their future needs. Then we can avoid 
overallocating in the iommu layer.

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