Any suggestions? Adding mem=4G to grub doesn`t help.
free total used free shared buffers cached Mem: 2538496 299684 2238812 0 7380 34328 -/+ buffers/cache: 257976 2280520 Swap: 9896000 0 9896000 uname -a Linux 2.6.26-1-xen-amd64 #1 SMP Fri Mar 13 21:39:38 UTC 2009 x86_64 GNU/Linux grub> displaymem displaymem EISA Memory BIOS Interface is present Address Map BIOS Interface is present Lower memory: 640K, Upper memory (to first chipset hole): 3072K [Address Range Descriptor entries immediately follow (values are 64-bit)] Usable RAM: Base Address: 0x0 X 4GB + 0x0, Length: 0x0 X 4GB + 0xa0000 bytes Reserved: Base Address: 0x0 X 4GB + 0xa0000, Length: 0x0 X 4GB + 0x60000 bytes Usable RAM: Base Address: 0x0 X 4GB + 0x100000, Length: 0x0 X 4GB + 0x300000 bytes