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[PATCH] Increase number of e820 entries hard limit from 32 to 128

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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 init.data increases by ~7.5K
on all systems, due to increase in size of static arrays.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Venkatesh Pallipadi
2005-05-01 08:58:51 -07:00
committed by Linus Torvalds
parent be9e68703c
commit f9ba70535d
10 changed files with 18 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
Documentation/i386/zero-page.txt
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@@ -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