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

Peter Krempa pkrempa at redhat.com
Tue Oct 13 17:57:07 UTC 2020

On Tue, Oct 13, 2020 at 18:47:39 +0200, Michal Privoznik 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"}

As I've pointed out in earlier review, I think that the feature name is
a bit misleading. It sounds like a statistic, not something that
actually returns memory to the host. The docs are now better but still
leave a lot of room for imagination.

IMO, if the feature is mainly for returning memory to the host, the
'reporting' word should not have been used.

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