CONFIG_HUGETLB_PAGE_SIZE_128K is not available for thedefaultarchitecture x86.
Result is shown for architecture metag
default or selected kernelversion does not have config value CONFIG_HUGETLB_PAGE_SIZE_128K.
Result is shown for kernelversion 6.7-rc3

128kB

configname: CONFIG_HUGETLB_PAGE_SIZE_128K

HugeTLB page size
└─>128kB
In linux kernel since version 3.1 (release Date: 2011-10-24)