On Mon, Jul 10, 2023 at 03:16:56PM -0700, Minchan Kim wrote: > This patchset uses frontswap for zram swap usecase and remove > swap_slot_free_notify swap specific operation in block device. > It shows 13% swapout improvement for MADV_PAGEOUT. Err, no. frontswap needs to go away, and not be tried to a block driver. If you want compressed swap without a block driver please use zswap and help improvig it and the swap abstraction to not require a backing allocation for it. We need to fix swap and not pile hacks on top of hacks.