The options to alter the vmsplit to enable more lowmem are hidden behind the expert option. Make it more exposed for -ck users and make the help menu more explicit about what each option means. -ck --- arch/x86/Kconfig | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) Index: linux-4.7-ck4/arch/x86/Kconfig =================================================================== --- linux-4.7-ck4.orig/arch/x86/Kconfig 2016-09-13 17:21:54.604195898 +1000 +++ linux-4.7-ck4/arch/x86/Kconfig 2016-09-13 17:21:54.601195965 +1000 @@ -1301,7 +1301,7 @@ config HIGHMEM64G endchoice choice - prompt "Memory split" if EXPERT + prompt "Memory split" default VMSPLIT_3G depends on X86_32 ---help--- @@ -1321,17 +1321,17 @@ choice option alone! config VMSPLIT_3G - bool "3G/1G user/kernel split" + bool "Default 896MB lowmem (3G/1G user/kernel split)" config VMSPLIT_3G_OPT depends on !X86_PAE - bool "3G/1G user/kernel split (for full 1G low memory)" + bool "1GB lowmem (3G/1G user/kernel split)" config VMSPLIT_2G - bool "2G/2G user/kernel split" + bool "2GB lowmem (2G/2G user/kernel split)" config VMSPLIT_2G_OPT depends on !X86_PAE - bool "2G/2G user/kernel split (for full 2G low memory)" + bool "2GB lowmem (2G/2G user/kernel split)" config VMSPLIT_1G - bool "1G/3G user/kernel split" + bool "3GB lowmem (1G/3G user/kernel split)" endchoice config PAGE_OFFSET