o Memory till end_pfn_map has been directly mapped. So all the memory
references to the last page (represented by end_pfn_map) should be
valid.
o I run into problem with kdump when I use memmap=exactmap option and also
pass memmap=X#Y to directly map acpi tables. ACPI initialization in second
kernel fails because some of the valid ACPI memory is not accessible.
o /proc/iomem shows ACPI tables at c7fcb940-c7fcf7ff : ACPI Tables. Here
end_pfn_map is set to c7fcf000. But c7fcf700 should also be a valid access.
Signed-off-by: Vivek Goyal <[email protected]>
---
diff -puN arch/i386/kernel/acpi/boot.c~acpi-map-address-fix arch/i386/kernel/acpi/boot.c
--- linux-2.6.15-rc5-mm1-16M/arch/i386/kernel/acpi/boot.c~acpi-map-address-fix 2005-12-07 15:56:33.000000000 +0530
+++ linux-2.6.15-rc5-mm1-16M-root/arch/i386/kernel/acpi/boot.c 2005-12-07 15:58:04.000000000 +0530
@@ -108,7 +108,7 @@ char *__acpi_map_table(unsigned long phy
if (!phys_addr || !size)
return NULL;
- if (phys_addr < (end_pfn_map << PAGE_SHIFT))
+ if (phys_addr < ((end_pfn_map << PAGE_SHIFT) + PAGE_SIZE))
return __va(phys_addr);
return NULL;
_
-
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