Messages in this thread | | | From | "H. Peter Anvin" <> | Subject | Re: Dmesg: Use a PAE enabled kernel | Date | 3 Mar 2003 19:22:25 -0800 |
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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.
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