Re: [Xen-devel] X86_64 and 4GB RAM using Flat Memory Model?

To:	"Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject:	Re: [Xen-devel] X86_64 and 4GB RAM using Flat Memory Model?
From:	"John Hannfield" <hal9020@xxxxxxxxx>
Date:	Sat, 28 Apr 2007 15:39:49 +0100
Cc:	xen-devel@xxxxxxxxxxxxxxxxxxx
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Which bootloader are you using to boot Xen? It's the bootloader which
provides the memory map.


I'm using Grub.

grub --version
grub (GNU GRUB 0.97)

Someone suggested getting grub to display the memory map, which shows this.

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

Does that look right ?
My boot entry in menu.lst is:

title           Xen 3.0.3 (kernel 2.6.16 + xensource)  [*** Option B ***]
kernel          /boot/xen-3.0.3-0.gz dom0_mem=262144 com1=115200,8n1
console=vga,com1
module          /boot/vmlinuz-2.6.16.29-xen0 root=/dev/md0 ro
console=tty0 console=ttyS0


--

John

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