More RAM than MemTotal

[Shachar Shemesh]

On 03/28/2012 08:21 PM, Oleg Goldshmidt wrote:
> $ dmesg | grep Memory
> [    0.000000] Memory: 3956448k/5242880k available (5873k kernel code,
> 1123116k absent, 163316k reserved, 5785k data, 960k init)
>
> I work out that 5242880k=5G, which I know to be wrong because I only
> have 4G of RAM. I seem to be "missing" 5242880k-3956448k=1286432k,
> which is exactly 1123116k+163316k - see above.
>
My guess is that "absent" refers to physical memory addresses that do
not have physical memory access through them. It seems that your BIOS
maps about 1GB of memory above the PCI hole, which is a reasonable
compromise.

Shachar

-- 
Shachar Shemesh
Lingnu Open Source Consulting Ltd.
http://www.lingnu.com

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