Can't fine 10 g of memory

[Alan Bunch]

Dr. David Alan Gilbert wrote:
> * Alan Bunch (Alan.Bunch at udfc.com) wrote:
>   
>> This is a don0 on Centos 5.
>>
>> Top report 6 gig, /proc/meminfo report 6 gig dmidecode says 4 sticks of 
>> 4 gig.
>>
>> Any idea why I can't see of my memory ?
>>     
>
> Hmm 6 isn't a very round number is it.  One thing that is sometimes
> interesting for missing RAM is the BIOS-e820 messages you get right
> at the very start of boot - is it all showing up as 'useable' in
> that (from the top of a dmesg)
>
> Dave
>   
The BIOS looks like it sees it all.  That number is 16 gig.

dmesg output

Bootdata ok (command line is ro root=/dev/disk/root rhgb quiet)
Linux version 2.6.18-8.1.15.el5xen (mockbuild at builder6.centos.org) (gcc 
version
4.1.1 20070105 (Red Hat 4.1.1-52)) #1 SMP Mon Oct 22 09:01:12 EDT 2007
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 00000003eb0a8000 (usable)
On node 0 totalpages: 4108456
  DMA zone: 4108456 pages, LIFO batch:31
DMI 2.3 present.

alabun