On Mon, Jul 10, 2023 at 10:18 PM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > 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. > +1. Based on earlier discussions, it seems like the agreed upon way forward is to remove the frontswap interface: https://lore.kernel.org/linux-mm/20230530235447.GB102494@xxxxxxxxxxx/
