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SubjectRe: Linux 2.2.19pre2
On Wed, Dec 20, 2000 at 02:28:58PM +0100, Andrea Arcangeli wrote:
> I was in the process of fixing this (I also just backported the thinkpad
> %edx clobber fix), but if somebody is going to work on this please let
> me know so we stay in sync.

Ok this should fix the e820 memory detection, against 2.2.19pre2:

While fixing the code I noticed some bug was inerith from 2.4.x so I forward
ported the fixes to 2.4.0-test13-pre3:

I also include them below so they're handy for Linus:

diff -urN 2.4.0-test13-pre3/arch/i386/kernel/setup.c 2.4.0-test13-pre3-e820/arch/i386/kernel/setup.c
--- 2.4.0-test13-pre3/arch/i386/kernel/setup.c Thu Dec 14 22:33:59 2000
+++ 2.4.0-test13-pre3-e820/arch/i386/kernel/setup.c Thu Dec 21 21:12:47 2000
@@ -477,7 +477,7 @@
if (start < 0x100000ULL && end > 0xA0000ULL) {
if (start < 0xA0000ULL)
add_memory_region(start, 0xA0000ULL-start, type);
- if (end < 0x100000ULL)
+ if (end <= 0x100000ULL)
start = 0x100000ULL;
size = end - start;
@@ -518,7 +518,8 @@

e820.nr_map = 0;
add_memory_region(0, LOWMEMSIZE(), E820_RAM);
- add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
+ add_memory_region(HIGH_MEMORY, (mem_size << 10)-HIGH_MEMORY,
+ E820_RAM);
printk("BIOS-provided physical RAM map:\n");

The above patches doesn't include the fix for the thinkpad from Marc Joosen,
a backport of such bugfix is separately backported here (because it's
orthogonal with the other bugfixes):

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