On Thu, 21 Aug 2014 10:45:12 +0200 Marek Szyprowski [off-list ref] wrote:

Russell King recently noticed that limiting default CMA region only to
low memory on ARM architecture causes serious memory management issues
with machines having a lot of memory (which is mainly available as high
memory). More information can be found the following thread:
http://thread.gmane.org/gmane.linux.ports.arm.kernel/348441/

Those two patches removes this limit letting kernel to put default CMA
region into high memory when this is possible (there is enough high
memory available and architecture specific DMA limit fits).

This should solve strange OOM issues on systems with lots of RAM
(i.e. >1GiB) and large (>256M) CMA area.

What do we think is the priority on these fixes?  3.17 or 3.18?