Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/mlock-guest-memory.

Description:

Guest memory may be swapped out if there is memory pressure on the host.
On the other hand, each guest has a different priority and sometimes
some guests need to avoid memory reclaim to keep their system requirement
even if there is heavy memory pressure in the host.

Current qemu has the mlock feature (-realtime mlock=on|off) to pin down
guest memory on the RAM and libvirt also supports it.

This blueprint will allow Nova to support the mlock feature in order to
avoid guest memory reclaim.

Specification URL (additional information):

None