virsh dommemstat doesn't update its information

[Michal Privoznik]

On 3/29/21 4:00 PM, Lentes, Bernd wrote:
> Hi,
> 
> i'm playing a bit around with my domains and the balloon driver.
> To get information about ballooning i use virsh dommemstat.
> But i only get very few information:
> 
> virsh # dommemstat vm_idcc_devel
> actual 1044480
> last_update 0
> rss 1030144
> 
> Also configuring "dommemstat --domain vm_idcc_devel --period 5 --live"
> or "dommemstat --domain vm_idcc_devel --period 5 --current" does neither update nor extend the information.
> 
> In vm_idcc_devel virtio_balloon is loaded:
> idcc-devel:~ # lsmod|grep balloon
> virtio_balloon         22788  0
> 
> Guest OS is SLES 10 SP4. Is that too old ?

Yeah, that is ~10 years old and I believe that virtio_balloon module is 
lacking feature that enable QEMU (and subsequently libvirt) report more 
info.

Michal