On Mon, 21 Sep 2020 22:01:46 -0400 Rik van Riel <riel@xxxxxxxxxxx> wrote: > Both with frontswap/zswap, and with some extremely fast IO devices, > swap IO will be done before the "asynchronous" swap_readpage() call > has returned. > > In that case, doing swap readahead only wastes memory, increases > latency, and increases the chances of needing to evict something more > useful from memory. In that case, just skip swap readahead. Any quantitative testing results?
