Hello, On Tue, 7 Mar 2017 17:24:21 +0000, David Laight wrote:
> Are the coherent mappings just used for ring structures? > If it might be reasonable to allocate them as a single entity, > thus guaranteeing they all reside in a single 4G region. Do we have the guarantee that a DMA coherent allocation will not span a 4G boundary? Thanks, Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
