Contiguous Memory Allocator

modulename: cma.ko

and/or

dma-contiguous.ko

configname: CONFIG_CMA

Linux Kernel Configuration
└─>Device Drivers
└─>Generic Driver Options
└─>Contiguous Memory Allocator
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This enables the Contiguous Memory Allocator which allows drivers
to allocate big physically-contiguous blocks of memory for use with
hardware components that do not support I/O map nor scatter-gather.

For more information see <include/linux/dma-contiguous.h>.
If unsure, say "n".

source code: