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From
SubjectRe: Dmesg: Use a PAE enabled kernel
Date
Followup to:  <3E6381B9.4090708@walrond.org>
By author: Andrew Walrond <andrew@walrond.org>
In newsgroup: linux.dev.kernel
>
> The dump looks like this:
>
> BIOS-provided physical RAM map:
> BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
> BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
> BIOS-e820: 0000000000100000 - 00000000bfffa000 (usable)
> BIOS-e820: 00000000bfffa000 - 00000000bffff000 (ACPI data)
> BIOS-e820: 00000000bffff000 - 00000000c0000000 (ACPI NVS)
> BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
> BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
> BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
> BIOS-e820: 0000000100000000 - 0000000140000000 (usable)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This memory lives above the 4GB mark.

> Warning only 4GB will be used.
> Use a PAE enabled kernel.
> 3200MB HIGHMEM available.
> 896MB LOWMEM available.
>
> So you are saying that not all the 4Gb of ram will get mapped/used
> (specifically, everything not marked 'usable') ?

Basically, your motherboard only allows 3 GB below the 4 GB boundary;
the rest ends up above.

-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
Architectures needed: cris ia64 m68k mips64 ppc ppc64 s390 s390x sh v850 x86-64
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