On Tue, 2016-04-19 at 15:02 +0000, Li, Liang Z wrote: > > > > 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 ...
Fair enough. It would be good to have that mentioned in the changelog.
