---

yaml
---
r: 19413
b: refs/heads/master
c: 975b3d3
h: refs/heads/master
i:
  19411: 637535a
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4940fb441275d654cff7d0f7708f91bd8435a85a
+refs/heads/master: 975b3d3d5b983eb60706d35f0d24cd19f6badabf

trunk/arch/i386/Kconfig

@@ -448,6 +448,43 @@ config HIGHMEM64G
 
 endchoice
 
+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
+
 config HIGHMEM
 	bool
 	depends on HIGHMEM64G || HIGHMEM4G

trunk/include/asm-i386/page.h

@@ -110,10 +110,10 @@ extern int page_is_ram(unsigned long pagenr);
 #endif /* __ASSEMBLY__ */
 
 #ifdef __ASSEMBLY__
-#define __PAGE_OFFSET		(0xC0000000)
+#define __PAGE_OFFSET		CONFIG_PAGE_OFFSET
 #define __PHYSICAL_START	CONFIG_PHYSICAL_START
 #else
-#define __PAGE_OFFSET		(0xC0000000UL)
+#define __PAGE_OFFSET		((unsigned long)CONFIG_PAGE_OFFSET)
 #define __PHYSICAL_START	((unsigned long)CONFIG_PHYSICAL_START)
 #endif
 #define __KERNEL_START		(__PAGE_OFFSET + __PHYSICAL_START)