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Subject[PATCH] 2.5.5-dj2, modify arch/i386/Config.help for highpte options.
Date
This patch modifies the help text for the CONFIG_NOHIGHMEM option in
arch/i386/Config.help to explain the two new options;
CONFIG_HIGHMEM4G_HIGHPTE and CONFIG_HIGHMEM64G_HIGHPTE.

Since this is a choice selection, the help text for the first option,
CONFIG_NOHIGHMEM is the only one which is visible using the current
configurators.

Here is a snippet from arch/i386/config.in both 2.5.5-dj2 and 2.5.6-pre1:

choice 'High Memory Support' \
"off CONFIG_NOHIGHMEM \
4GB CONFIG_HIGHMEM4G \
4GB-highpte CONFIG_HIGHMEM4G_HIGHPTE \
64GB CONFIG_HIGHMEM64G \
64GB-highpte CONFIG_HIGHMEM64G_HIGHPTE" off

If the notes for the highpte options are incorrect, feel free to provide
a better explanation.

Steven

--- linux-2.5.5-dj2/arch/i386/Config.help.orig Thu Feb 28 10:58:01 2002
+++ linux-2.5.5-dj2/arch/i386/Config.help Thu Feb 28 11:52:43 2002
@@ -111,13 +111,21 @@
possible.

If the machine has between 1 and 4 Gigabytes physical RAM, then
- answer "4GB" here.
+ answer "4GB" or "4GB-highpte" here. The "4GB-highpte" option
+ will put user-space page table entries into high memory.
+
+ If the machine has more than 4 Gigabytes physical RAM, then
+ answer "64GB" or "64GB-highpte" here. The "64GB-highpte" option
+ will put user-space page table entries into high memory.
+
+ Selecting either "64GB" or "64GB-highpte" turns Intel PAE
+ (Physical Address Extension) mode on.

- If more than 4 Gigabytes is used then answer "64GB" here. This
- selection turns Intel PAE (Physical Address Extension) mode on.
PAE implements 3-level paging on IA32 processors. PAE is fully
supported by Linux, PAE mode is implemented on all recent Intel
- processors (Pentium Pro and better). NOTE: If you say "64GB" here,
+ processors (Pentium Pro and better).
+
+ NOTE: If you say "64GB" or "64GB-highpte" here,
then the kernel will not boot on CPUs that don't support PAE!

The actual amount of total physical memory will either be


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