Re: Using 4gig PAE Capability

[Sven Hartge <sven@svenhartge.de>]

Sven Hartge <sven@svenhartge.de> wrote:
> David Baron <d_baron@012.net.il> wrote:

>> This is apparently not at all a rare problem. I put 4gig in my
>> computer but it only recognizes 3gig.

> Please post the output of

>  dmesg | grep BIOS-e820

> This will show the memory map provided by the BIOS.

I forgot to provide an example. Here is one from my laptop with 4GiB
installed:

e820: BIOS-provided physical RAM map:
BIOS-e820: [mem 0x0000000000000000-0x000000000009efff] usable
BIOS-e820: [mem 0x000000000009f000-0x000000000009ffff] reserved
BIOS-e820: [mem 0x0000000000100000-0x00000000dd04d3ff] usable
BIOS-e820: [mem 0x00000000dd04d400-0x00000000dd04f3ff] ACPI NVS
BIOS-e820: [mem 0x00000000dd04f400-0x00000000dfffffff] reserved
BIOS-e820: [mem 0x00000000f8000000-0x00000000fbffffff] reserved
BIOS-e820: [mem 0x00000000fec00000-0x00000000fec0ffff] reserved
BIOS-e820: [mem 0x00000000fed18000-0x00000000fed1bfff] reserved
BIOS-e820: [mem 0x00000000fed20000-0x00000000fed8ffff] reserved
BIOS-e820: [mem 0x00000000feda0000-0x00000000feda5fff] reserved
BIOS-e820: [mem 0x00000000fee00000-0x00000000fee0ffff] reserved
BIOS-e820: [mem 0x00000000ffe60000-0x00000000ffffffff] reserved
BIOS-e820: [mem 0x0000000100000000-0x000000011fffffff] usable

The number 0x0000000100000000 is exactly the 4GiB memory border, the
last line represents some amount of memory being remapped beyond that
border to be accessible 

Grüße,
Sven.

-- 
Sigmentation fault. Core dumped.