Maximum count of the CMA areas

configname: CONFIG_CMA_AREAS

Linux Kernel Configuration
└─>Memory Management options
└─>Maximum count of the CMA areas
In linux kernel since version 3.1 (release Date: 2011-10-24)  
CMA allows to create CMA areas for particular purpose, mainly,
used as device private area. This parameter sets the maximum
number of CMA area in the system.

If unsure, leave the default value "8" in UMA and "20" in NUMA.

depends
CONFIG_CMA