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Re: [Xen-devel] not enough memory for DOM0 memory reservation

To: Fernanda Barbosa Coelho <fbarbosa@xxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] not enough memory for DOM0 memory reservation
From: Jan Kundrát <jan.kundrat@xxxxxx>
Date: Thu, 20 Jan 2005 15:58:05 +0100
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Fernanda Barbosa Coelho wrote:
Hi
I have a PentiumIII with 131079 kb of RAM, I configed my system by following the suggestions.
When I boot xen0, the following error msg printed on the screen:

(xen)> not enough memory for DOM0 memory reservation


My grub configuration look like this:

title Xen 2.0.1 / XenLinux 2.6.9
       kernel /boot/xen.gz dom0_mem=131072 console=vga
       module /boot/vmlinuz-2.6.9-xen0 root=/dev/hda3 ro console=tty0

Xen needs some amount fo memory for itself (32MB, according to what other people said), so you'll have to reduce the dom0_mem parameter by at least 32MB. And of course you'll probably want some memory for other domains, so you can decrease this number even more, or just use baloon driver for lowering dom0 memory usage on-the-fly.

-jkt

--
cd /local/pub && more beer > /dev/mouth



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