On Monday 27 June 2011, Marek Szyprowski wrote:

quoted

On a related note, do you plan to make the CMA work use this
transparently, or do you want to have a DMA_ATTR_LARGE or
DMA_ATTR_CONTIGUOUS for CMA?

IMHO it will be better to hide the CMA from the drivers. Memory allocated
from CMA doesn't really differ from the one allocated by dma_alloc_coherent()
(which internally use alloc_pages()), so I really see no reason for adding
additional attribute for it.

Ok, fair enough. On a semi-related topic, IIRC we still need to make sure
that dma_alloc_coherent() pages are unmapped from the linear mapping. I hope
this is independent of both CMA and this patch.

	Arnd