choice prompt "Memory model" default FLATMEM default SPARSEMEM if ARCH_SPARSEMEM_DEFAULT default DISCONTIGMEM if ARCH_DISCONTIGMEM_DEFAULT config FLATMEM bool "Flat Memory" depends on !ARCH_DISCONTIGMEM_ENABLE || ARCH_FLATMEM_ENABLE help This option allows you to change some of the ways that Linux manages its memory internally. Most users will only have one option here: FLATMEM. This is normal and a correct option. If unsure, choose this option over any other. config DISCONTIGMEM bool "Discontigious Memory" depends on ARCH_DISCONTIGMEM_ENABLE help If unsure, choose "Flat Memory" over this option. endchoice