CONFIG_IA64_GRANULE_16MB is not available for thedefaultarchitecture x86.
Result is shown for architecture ia64

16MB

configname: CONFIG_IA64_GRANULE_16MB

Physical memory granularity
└─>16MB
In linux kernel since version 2.6.12  
IA-64 identity-mapped regions use a large page size called "granules".

Select "16MB" for a small granule size.
Select "64MB" for a large granule size. This is the current default.