Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range.
From: Roland Dreier
Date: Tue Apr 24 2007 - 17:33:27 EST
> My suggestion would be to allocate top-down in the 32-bit IOMMU space.
I think that's good for normal things, but it's not unreasonable to
want to map > 4 GB of memory at once for an Infiniband device.
So maybe we would want some heuristics about the size of the mapping
being requested or the amount of 32-bit space left to decide whether a
mapping should be below 4 GB.
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