Goal

With freePageReporting the guest OS informs the hypervisor aboutpages which are not in use by the guest anymore. The hypervisor can use this information for freeing these pages.
This is a flag on the ballooning device: https://libvirt.org/formatdomain.html#memory-balloon-device

User Stories

• As a VM or InstanceType owner I want define a VM to use freePageReporting so that the hypervisor will free memory that is not used by the guest and thus will reduce memory pressure on the host.
• another user story

Non-Requirements

• List of things not included in this epic, to alleviate any doubt raised during the grooming process.

Notes

• reporting should not be done for hugepages, because there is much more reporting than freeing pages
• reporting should not be done when device passthrough is used, because shared memory should not be freed

Done Checklist