path: root/Documentation/i386
diff options
authorVenkatesh Pallipadi <>2005-05-01 08:58:51 -0700
committerLinus Torvalds <>2005-05-01 08:58:51 -0700
commitf9ba70535dc12d9eb57d466a2ecd749e16eca866 (patch)
tree7032500f7697e37e8e93869bdcefd4ab5473a136 /Documentation/i386
parentbe9e68703c53fece406bc2e40976a5cfe2a8e77f (diff)
[PATCH] Increase number of e820 entries hard limit from 32 to 128
The specifications that talk about E820 map doesn't have an upper limit on the number of e820 entries. But, today's kernel has a hard limit of 32. With increase in memory size, we are seeing the number of E820 entries reaching close to 32. Patch below bumps the number upto 128. The patch changes the location of EDDBUF in zero-page (as it comes after E820). As, EDDBUF is not used by boot loaders, this patch should not have any effect on bootloader-setup code interface. Patch covers both i386 and x86-64. Tested on: * grub booting bzImage * lilo booting bzImage with EDID info enabled * pxeboot of bzImage Side-effect: bss increases by ~ 2K and increases by ~7.5K on all systems, due to increase in size of static arrays. Signed-off-by: Venkatesh Pallipadi <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'Documentation/i386')
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/i386/zero-page.txt b/Documentation/i386/zero-page.txt
index 67c053a099ed..df28c7416781 100644
--- a/Documentation/i386/zero-page.txt
+++ b/Documentation/i386/zero-page.txt
@@ -79,6 +79,6 @@ Offset Type Description
0x22c unsigned long ramdisk_max
0x230 16 bytes trampoline
0x290 - 0x2cf EDD_MBR_SIG_BUFFER (edd.S)
-0x2d0 - 0x600 E820MAP
-0x600 - 0x7ff EDDBUF (edd.S) for disk signature read sector
-0x600 - 0x7eb EDDBUF (edd.S) for edd data
+0x2d0 - 0xd00 E820MAP
+0xd00 - 0xeff EDDBUF (edd.S) for disk signature read sector
+0xd00 - 0xeeb EDDBUF (edd.S) for edd data