Hi, As I understand it, zswap currently handles same filled pages by storing them uncompressed and then copying them out when they are loaded. A possible alternative could be to have same filled pages that get swapped out mapped to the page stored in zswap as copy on write in the page table, instead of being marked as swapped out. Then reads from the "swapped out" page will just read the underlying page stored in zswap, and the stored page will only be truly loaded/copied out when it is written to. This is similar in concept to the copy on write mechanism the kernel has for forking processes. Would this be worth implementing? I am largely unfamiliar with kernel development. This is just an idea I figured I would mention here. Also please CC responses to me, since I am not subscribed to the mailing list.
