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

Michal Privoznik mprivozn at redhat.com
Wed Oct 14 05:56:32 UTC 2020

On 10/13/20 7:57 PM, Peter Krempa wrote:
> 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.

Oh sorry I missed that. I a penance I will post a cleanup patch. How 
does "free-pages" or "return-pages" or even "discard-pages" sound?


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