CONFIG_KERNEL_4M_PAGES is not available for thedefaultarchitecture x86.
Result is shown for architecture metag
Map kernel with 4MB pages
configname: CONFIG_KERNEL_4M_PAGES
Linux Kernel Configuration
└─>Map kernel with 4MB pages
In linux kernel since version 3.1 (release Date: 2011-10-24)
Map the kernel with large pages to reduce TLB pressure.