[patch] Patch to use 1GB Low Memory

1g_lowmem1_i386.diff (text/plain), 1.35 KB, created by Pedro Castro on 2005-02-20 07:05:20 UTC

Index: arch/i386/Kconfig
===================================================================
@@ -730,6 +730,20 @@ config X86_PAE
 	depends on HIGHMEM64G
 	default y
 
+config 1GLOWMEM
+	bool "1Gb Low Memory Support"
+	depends on NOHIGHMEM
+	default n
+	help
+	 Linux on i386 architecture normally supports just 896Mb without
+	 enabling HIGHMEM support. This option will enable you to support 1Gb
+	 of ram without needing to enable HIGHMEM support. The advantage of
+	 this is that you don't need the extra overhead of high memory support
+	 to utilise the last 128Mb of ram. However this may break drivers such
+	 as vmware.
+	 
+	 If unsure say "no"
+
 # Common NUMA Features
 config NUMA
 	bool "Numa Memory Allocation and Scheduler Support"
Index: include/asm-i386/page.h
===================================================================
@@ -120,12 +120,19 @@ extern int sysctl_legacy_va_layout;
 
 #endif /* __ASSEMBLY__ */
 
+#ifdef CONFIG_1GLOWMEM
+#ifdef __ASSEMBLY__
+#define __PAGE_OFFSET		(0xB0000000)
+#else
+#define __PAGE_OFFSET		(0xB0000000UL)
+#endif /* __ASSEMBLY__ */
+#else
 #ifdef __ASSEMBLY__
 #define __PAGE_OFFSET		(0xC0000000)
 #else
 #define __PAGE_OFFSET		(0xC0000000UL)
-#endif
-
+#endif /* __ASSEMBLY__ */
+#endif /* CONFIG_1GLOWMEM */
 
 #define PAGE_OFFSET		((unsigned long)__PAGE_OFFSET)
 #define VMALLOC_RESERVE		((unsigned long)__VMALLOC_RESERVE)