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[Xen-users] Ballooning support in HVM domains (Centos 5.3)


  • To: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: Aravindh Puthiyaparambil <aravindh@xxxxxxxxxx>
  • Date: Wed, 12 May 2010 13:40:44 -0700
  • Accept-language: en-US
  • Acceptlanguage: en-US
  • Delivery-date: Wed, 12 May 2010 13:47:46 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>
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  • Thread-topic: Ballooning support in HVM domains (Centos 5.3)

Hi,

 

I am running Xen packaged with Centos 5.3 x86_64.

xen_major              : 3

xen_minor              : 1

xen_extra              : .2-164.11.1.el5

 

I created a Centos 5.3 HVM domain (fully virtualized domain) with the following configuration:

 

name = 'centos-x86_64'

memory = 1024

maxmem = 2048

vcpus = 1

vnc = 1

vncdisplay = 1

vncunused = 0

apic = 1

pae = 1

acpi = 1

disk = [ 'phy:/dev/vm/centos-x86_64,hda,w']

vif = [ '' ]

usbdevice = 'tablet'

builder = 'hvm'

kernel = '/usr/sbin/hvmloader'

boot = 'cd'

device_model = '/usr/sbin/qemu-dm'

on_reboot   = 'restart'

on_crash    = 'preserve'

 

The domain installed and booted successfully. I want to increase the memory in the domain to 1512MB from 1024MB using the xm mem-set command. On issuing the command, I do not see the memory changing dynamically in the domain. The increase is only picked up on a reboot. When I do an lsmod in the domain, I see that the xen_balloon driver is loaded. However, I cannot see a /proc/xen directory. The xen_balloon driver is loaded in Dom0 and I do see the /proc/xen directory there. Do I need to do anything extra to enable ballooning in a HVM / fully virtualized domain?

 

Thanks,

Aravindh

 

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