I've noticed that when you do ``swapctl -d <swapdev>' all accesses to the count-of-swapped-out-pages are blocked. Seems that bringing the out-swapped pages back takes some lock for the entire process, which can be quite lengthy if there's a lot of swap...
Among other use cases, there's no way to tell how-many-pages-remain- to-swap-in; it also seems to prevent running processes from bringing their own pages back in. Shouldn't we be occassionally releasing-and-reacquiring the relevant lock, so that other things can also make progress? +--------------------+--------------------------+----------------------+ | Paul Goyette | PGP Key fingerprint: | E-mail addresses: | | (Retired) | FA29 0E3B 35AF E8AE 6651 | p...@whooppee.com | | Software Developer | 0786 F758 55DE 53BA 7731 | pgoye...@netbsd.org | | & Network Engineer | | pgoyett...@gmail.com | +--------------------+--------------------------+----------------------+
