> Note that this patch does NOT properly drop a region which, for instance,
> begins at 0x80000000 of length 512, because it's length is NOT zero (until
> we page align it.) Such regions may in fact exist as left-overs from ACPI
> or NVS regions.
ACPI regions would be of type E820_ACPI and thus skipped automatically.
However, you are right, on Intel platforms having less than a page of
memory is like having no memory at all, see patch below. Is this one
acceptable now?
--- linux/arch/i386/kernel/setup.c Wed Dec 8 07:01:40 1999
+++ work/arch/i386/kernel/setup.c Thu Dec 16 09:38:54 1999
@@ -594,7 +594,7 @@
for (i = 0; i < e820.nr_map; i++) {
unsigned long curr_pfn;
/* RAM? */
- if (e820.map[i].type != E820_RAM)
+ if (e820.map[i].type != E820_RAM ||
PFN_DOWN(e820.map[i].size) == 0)
continue;
curr_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
if (curr_pfn > max_pfn)
-
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