On Mon, Jul 31, 2017 at 04:36:47PM +0900, Minchan Kim wrote: > Do you suggest define something special flag(e.g., SWP_INMEMORY) > for in-memory swap to swap_info_struct when swapon time manually > or from bdi_queue_someting automatically? > And depending the flag of swap_info_struct, use the onstack bio > instead of dynamic allocation if the swap device is in-memory?
Currently swap always just does I/O on a single page as far as I can tell, so it can always just use an on-stack bio and biovec.