CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG (not configurable)

configname: CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG

Linux Kernel Configuration
└─>Memory Management options
└─>ARCH_ENABLE_MEMORY_HOTPLUG
In linux kernel since version 2.6.16.30-pre1 (release Date: 2006-09-22)  
is selected by
CONFIG_MEMORY_HOTPLUG