diff -urN oldtree/arch/i386/Kconfig newtree/arch/i386/Kconfig
--- oldtree/arch/i386/Kconfig	2006-06-07 15:35:00.025013250 +0000
+++ newtree/arch/i386/Kconfig	2006-06-08 19:30:29.940823250 +0000
@@ -426,6 +426,43 @@
 source "drivers/firmware/Kconfig"
 
 choice
+	depends on EXPERIMENTAL && !X86_PAE
+	prompt "Memory split"
+	default VMSPLIT_3G
+	help
+	  Select the desired split between kernel and user memory.
+
+	  If the address range available to the kernel is less than the
+	  physical memory installed, the remaining memory will be available
+	  as "high memory". Accessing high memory is a little more costly
+	  than low memory, as it needs to be mapped into the kernel first.
+	  Note that increasing the kernel address space limits the range
+	  available to user programs, making the address space there
+	  tighter.  Selecting anything other than the default 3G/1G split
+	  will also likely make your kernel incompatible with binary-only
+	  kernel modules.
+
+	  If you are not absolutely sure what you are doing, leave this
+	  option alone!
+
+	config VMSPLIT_3G
+		bool "3G/1G user/kernel split"
+	config VMSPLIT_3G_OPT
+		bool "3G/1G user/kernel split (for full 1G low memory)"
+	config VMSPLIT_2G
+		bool "2G/2G user/kernel split"
+	config VMSPLIT_1G
+		bool "1G/3G user/kernel split"
+endchoice
+
+config PAGE_OFFSET
+	hex
+	default 0xB0000000 if VMSPLIT_3G_OPT
+	default 0x78000000 if VMSPLIT_2G
+	default 0x40000000 if VMSPLIT_1G
+	default 0xC0000000
+
+choice
 	prompt "High Memory Support"
 	default NOHIGHMEM