On Fri, Dec 07, 2018 at 02:14:03AM +0000, Huang, Kai wrote: > Alternatively, we can choose to use per-socket keyID, but not to program > keyID globally across all sockets, so you don't have to save key while > still supporting CPU hotplug. Per-socket KeyID approach would make things more complex. For instance KeyID on its own will not be enough to refer a key. You will need a node too. It will also require a way to track whether theirs an KeyID on other node for the key. It also makes memory management less flexible: runtime migration of the memory between nodes will be limited and it can hurt memory availablity for non-encrypted tasks too. In general, I don't see per-socket KeyID handling very attractive. It creates more problems than solves. -- Kirill A. Shutemov
