[PATCH 6/8] drivers: add Contiguous Memory Allocator

[Russell King - ARM Linux]

On Tue, Jul 05, 2011 at 09:41:48AM +0200, Marek Szyprowski wrote:
> The Contiguous Memory Allocator is a set of helper functions for DMA
> mapping framework that improves allocations of contiguous memory chunks.
> 
> CMA grabs memory on system boot, marks it with CMA_MIGRATE_TYPE and
> gives back to the system. Kernel is allowed to allocate movable pages
> within CMA's managed memory so that it can be used for example for page
> cache when DMA mapping do not use it. On dma_alloc_from_contiguous()
> request such pages are migrated out of CMA area to free required
> contiguous block and fulfill the request. This allows to allocate large
> contiguous chunks of memory at any time assuming that there is enough
> free memory available in the system.
> 
> This code is heavily based on earlier works by Michal Nazarewicz.

And how are you addressing the technical concerns about aliasing of
cache attributes which I keep bringing up with this and you keep
ignoring and telling me that I'm standing in your way.