Hi, This topic proposal would be to present and discuss multiple MM features to improve host memory overcommit while running VMs. There are two general cases: 1. The host and its guests operate independently, 2. The host and its guests cooperate by techniques like ballooning. In the first case, we would discuss some new techniques, e.g., fast access bit harvesting in the KVM MMU, and some difficulties, e.g., double zswapping. In the second case, we would like to discuss a novel working set size (WSS) notifier framework and some improvements to the ballooning policy. The WSS notifier, when available, can report WSS to its listeners. VM Memory Overcommit is one of its use cases: the virtio-balloon driver can register for WSS notifications and relay WSS to the host. The host can leverage the WSS notifications and improve the ballooning policy. This topic would be of interest to a wide range of audience, e.g., phones, laptops and servers. Co-presented with Yuanchu Xie. Thanks, -T.J.
