* Stefan Hajnoczi (stefa...@gmail.com) wrote: > On Tue, Jan 9, 2018 at 7:55 PM, Dr. David Alan Gilbert > <dgilb...@redhat.com> wrote: > >> Certain guest operations like rebooting or zeroing memory will defeat > >> the incremental guest RAM snapshot feature. It's worth thinking about > >> these cases to make sure this feature would be worth it in real use > >> cases. > > > > But those probably wouldn't upset an NVDimm? > > If the guest dirties all RAM then the incremental snapshot feature > degrades to a full snapshot. I'm asking if there are common > operations where that happens. > > I seem to remember Windows guests zero all pages on cold boot. Maybe > that's not the case anymore. > > Worth checking before embarking on this feature because it could be a > waste of effort if it turns out real-world guests dirty all memory in > common cases.
Right, but I'm hoping that there's some magic somewhere where an NVDimm doesn't get zero'd because of a cold boot since that would seem to make it volatile. Dave -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
