> On Tue, 2016-04-19 at 22:34 +0800, Liang Li wrote: > > The free page bitmap will be sent to QEMU through virtio interface and > > used for live migration optimization. > > Drop the cache before building the free page bitmap can get more free > > pages. Whether dropping the cache is decided by user. > > > > How do you prevent the guest from using those recently-freed pages for > something else, between when you build the bitmap and the live migration > completes? Because the dirty page logging is enabled before building the bitmap, there is no need to prevent the guest from using the recently-freed pages ... Liang ��.n������g��� �a��� �&ޖ)���)��h���&������梷���� �Ǟ�m������)������^�����������v���O��zf������