x86: increase the kernel text limit to 512 MB

people sometimes do crazy stuff like building really large static
arrays into their kernels or building allyesconfig kernels. Give
more space to the kernel and push modules up a bit: kernel has
512 MB and modules have 1.5 GB.

Should be enough for a few years ;-)

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index a007454..0172169 100644 (file)
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -383,12 +383,12 @@ NEXT_PAGE(level2_ident_pgt)
 
 NEXT_PAGE(level2_kernel_pgt)
        /*
-        * 128 MB kernel mapping. We spend a full page on this pagetable
+        * 512 MB kernel mapping. We spend a full page on this pagetable
         * anyway.
         *
         * The kernel code+data+bss must not be bigger than that.
         *
-        * (NOTE: at +128MB starts the module area, see MODULES_VADDR.
+        * (NOTE: at +512MB starts the module area, see MODULES_VADDR.
         *  If you want to increase this then increase MODULES_VADDR
         *  too.)
         */

diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h
index 1435460..aee05c6 100644 (file)
--- a/include/asm-x86/page_64.h
+++ b/include/asm-x86/page_64.h
@@ -48,10 +48,10 @@
 #define __VIRTUAL_MASK_SHIFT   48
 
 /*
- * Kernel image size is limited to 128 MB (see level2_kernel_pgt in
+ * Kernel image size is limited to 512 MB (see level2_kernel_pgt in
  * arch/x86/kernel/head_64.S), and it is mapped here:
  */
-#define KERNEL_IMAGE_SIZE      (128*1024*1024)
+#define KERNEL_IMAGE_SIZE      (512*1024*1024)
 #define KERNEL_IMAGE_START     _AC(0xffffffff80000000, UL)
 
 #ifndef __ASSEMBLY__

diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h
index 0a0b77b..01d2359 100644 (file)
--- a/include/asm-x86/pgtable_64.h
+++ b/include/asm-x86/pgtable_64.h
@@ -140,7 +140,7 @@ static inline void native_pgd_clear(pgd_t * pgd)
 #define VMALLOC_START    _AC(0xffffc20000000000, UL)
 #define VMALLOC_END      _AC(0xffffe1ffffffffff, UL)
 #define VMEMMAP_START   _AC(0xffffe20000000000, UL)
-#define MODULES_VADDR    _AC(0xffffffff88000000, UL)
+#define MODULES_VADDR    _AC(0xffffffffa0000000, UL)
 #define MODULES_END      _AC(0xfffffffffff00000, UL)
 #define MODULES_LEN   (MODULES_END - MODULES_VADDR)