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Re: [Xen-users] xen 4.1 missing memory

  • To: Xen User-List <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Fajar A. Nugraha" <list@xxxxxxxxx>
  • Date: Wed, 17 Aug 2011 16:43:57 +0700
  • Delivery-date: Wed, 17 Aug 2011 02:45:16 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

On Wed, Aug 17, 2011 at 2:35 PM, Ian Tobin <itobin@xxxxxxxxxxxxx> wrote:
> Hi,
> We have the dom0_mem=512M parameter set on boot which does show up after
> booting however ive noticed that it drops to roughly 256M on one of the
> boxes after the VMs are all started which is causing slow downs as it needs
> to swap.

IIRC that is expected behaviour, no matter what version the kernel is.

> The kernel is, has anyone else seen this?

dom0_mem only sets dom0's initial memory. If domU needs more memory,
dom0 can still baloon down. See dom0-min-mem and
enable-dom0-ballooning on /etc/xen/xend-config.sxp to change this


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