SYSTOR 2017 Posters Paper #8 Reviews and Comments =========================================================================== Paper #8 User Space Memory Management for Post-copy Migration Review #8A =========================================================================== Overall merit ------------- 4. Accept Reviewer expertise ------------------ 3. Knowledgeable Paper summary ------------- This submission describes work done to facilitate migration of containers between hosts using Linux's userfault technology. With containers, as opposed to VMs, there's an external process that manages copying of data post-migration. This process needs to track changes that happen in the container's address space, and this work adds the necessary hooks to enable this tracking. Comments for author ------------------- Nice work that fits the scope of SYSTOR. It's not clear what is the state of container migration today. Is it that it cannot be done? Or can it be done but the container might crash if its virtual address space happens to change? In the poster, please make it more clear what your contribution is---which parts describe what *you* did and which parts describe the existing landscape. - English mistake in paper: "it's memory dump" -> "its memory dump" Review #8B =========================================================================== Overall merit ------------- 3. Weak accept Reviewer expertise ------------------ 3. Knowledgeable Paper summary ------------- The poster discusses extensions to the Linux userfault mechanisms to enable post copy container migration. The approach extends kernel calls that modify memory mappings. Comments for author ------------------- This is a nice piece of engineering, and container migration is a timely and interesting issue that is relevant to systor. The research contributions of the work, however, as not as clear.