On Wed, 18 Aug 2021 at 05:40, JeffleXu <jefflexu@xxxxxxxxxxxxxxxxx> wrote: > I'm not sure if I fully understand your idea. Then in this case, host > daemon only prepares 4KB while guest thinks that the whole DAX window > (e.g., 2MB) has been fully mapped. Then when guest really accesses the > remained part (2MB - 4KB), page fault is triggered, and now host daemon > is responsible for downloading the remained part? Yes. Mapping an area just means setting up the page tables, it does not result in actual data transfer. Thanks, Miklos
