[PATCH v2 0/4] qemu: Add support for free-page-reporting

Nico Pache npache at redhat.com
Tue Oct 13 17:00:36 UTC 2020

I don't believe so, but David might have some more insight into that

Once the feature is enabled the guest will report pages on its freelist to
the hypervisor, and the host/hypervisor will then release them.

I'm not exactly sure what information we can or would want to 'stat' out of
this process... A counter for number of pages returned?


On Tue, Oct 13, 2020, 12:47 PM Michal Privoznik <mprivozn at redhat.com> wrote:

> On 10/13/20 5:10 PM, Michal Privoznik wrote:
> > On 10/13/20 1:35 AM, Nico Pache wrote:
> >> gitlab issue: https://gitlab.com/libvirt/libvirt/-/issues/79
> >>
> >> The virtio-balloon device now has the ability to report free pages
> >> back to the hypervisor for reuse by other programs.
> Is this something that we might want to report? I mean, we have 'virsh
> dommemstat $dom' which under the hood calls:
> {"execute":"qom-get","arguments":{"path":"/machine/peripheral/balloon0","property":"guest-stats"},"id":"libvirt-400"}
> Michal
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