Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range. | Date | Wed, 25 Apr 2007 08:55:48 +0200 |
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On Wednesday 25 April 2007 03:12:51 H. Peter Anvin wrote:
> You can probably find almost any possible bitmask if you look long > enough. Hardware vendors are notorious for this kind of "optimizations".
The nice thing is if this was solved in the IOMMU code then we could drop (or not initialize) GFP_DMA on systems with that hardware. I guess GFP_DMA32 would still need to stay for the graphics devices though.
Not sure how much difference it would make though, but at least Christoph Lameter seems to think it would.
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