[Asterisk-Users] Memory Problems

[Dumpolid Exeplish]

Hello,
This is not a question directly related to asterisk.
I am currently rinning ansterisk on  a Debian server and i just upgraded my
memory from 1GB to 2GB. However, my linux OS does not recognise the memory
upgrade. The BIOS does, but the Debian Linux refuses to use the entier
memory, currently, it registered only 900MB.
Can anyone tell me why thi is and a solution to this??

My Debian version is "Linux asterisk 2.6.12.3 #1 Mon Aug 1 19:33:51 WAT 2005
i686 GNU/Linux"

The server is currently routing calls from SIP internal users through an E1
card (TE410)

OUTPUT FROM dmesg command

00000000009dc00 (usable)
 BIOS-e820: 000000000009dc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000007fee0000 (usable)
 BIOS-e820: 000000007fee0000 - 000000007fee3000 (ACPI NVS)
 BIOS-e820: 000000007fee3000 - 000000007fef0000 (ACPI data)
 BIOS-e820: 000000007fef0000 - 000000007ff00000 (reserved)
 BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
Warning only 896MB will be used.
Use a HIGHMEM enabled kernel.
896MB LOWMEM available.
found SMP MP-table at 000f5a20
On node 0 totalpages: 229376
  DMA zone: 4096 pages, LIFO batch:1
  Normal zone: 225280 pages, LIFO batch:31
  HighMem zone: 0 pages, LIFO batch:1

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