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Re: [Xen-users] pin cpu 0 to dom0.

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] pin cpu 0 to dom0.
From: "J. Roeleveld" <joost@xxxxxxxxxxxx>
Date: Fri, 4 Jun 2010 13:23:45 +0200
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On Friday 04 June 2010 13:12:40 Robert Dunkley wrote:
> Hi,
> First try setting the option in xend-config:
> vi /etc/xen/xend-config.sxp  -  set “(dom0-min-mem 0)” and set “(dom0-cpus
>  1)”

NOTE: Please ignore this advice.

The setting in the "xend-config.sxp" is ignored. (Tried it and it doesn't work)
Setting “(dom0-min-mem 0)” is not a good idea, this allows the dom0 to loose 
ALL memory.

> You might also need to fix the Dom0 Ram:
> dom0_mem=2048M (Put this in the kernel boot line)

Again, wrong place to set this.

The following options in "grub.conf" works on my system:
title Xen 3.4.2 - Linux 2.6.29-r4
root (hd0,0)
kernel /boot/xen.gz dom0_mem=768M console=vga dom0_max_vcpus=1 dom0_vcpus_pin
module (hd0,0)/linux-2.6.29-xen-r4 root=/dev/md3 netloop.nloopbacks=32

Pinning dom0 to a single VCPU needs to be done with the XEN-part, the kernel 
can not do this.

Joost Roeleveld

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