6 Jul
2011
6 Jul
'11
2:37 p.m.
On Wed, 6 Jul 2011, Russell King - ARM Linux wrote:
Another issue is that when a platform has restricted DMA regions, they typically don't fall into the highmem zone. As the dmabounce code allocates from the DMA coherent allocator to provide it with guaranteed DMA-able memory, that would be rather inconvenient.
Do we encounter this in practice i.e. do those platforms requiring large contiguous allocations motivating this work have such DMA restrictions?
Nicolas