NVDIMM DAX: Raw access to persistent memory

configname: CONFIG_NVDIMM_DAX

Linux Kernel Configuration
└─>Device Drivers
└─>NVDIMM (Non-Volatile Memory Device) Support
└─>NVDIMM DAX: Raw access to persistent memory
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Support raw device dax access to a persistent memory
namespace. For environments that want to hard partition
persistent memory, this capability provides a mechanism to
sub-divide a namespace into character devices that can only be
accessed via DAX (mmap(2)).

Select Y if unsure