PMEM DAX: direct access to persistent memory

modulename: dax_pmem.ko

configname: CONFIG_DEV_DAX_PMEM

Linux Kernel Configuration
└─>Device Drivers
└─>DAX: direct access to differentiated memory
└─>NVDIMM (Non-Volatile Memory Device) Support
└─>PMEM DAX: direct access to persistent memory
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Support raw access to persistent memory. Note that this
driver consumes memory ranges allocated and exported by the
libnvdimm sub-system.

Say M if unsure

source code: