Messages in this thread | | | Date | Thu, 22 Jul 2010 08:39:17 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [RFC 1/3 v3] mm: iommu: An API to unify IOMMU, CPU and device memory management |
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On Wed, Jul 21, 2010 at 09:30:34PM -0700, Zach Pfeffer wrote: > This goes to the nub of the issue. We need a lot of 1 MB physically > contiguous chunks. The system is going to fragment and we'll never get > our 12 1 MB chunks that we'll need, since the DMA API allocator uses > the system pool it will never succeed.
By the "DMA API allocator" I assume you mean the coherent DMA interface, The DMA coherent API and DMA streaming APIs are two separate sub-interfaces of the DMA API and are not dependent on each other.
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