The proposal suggests using zram device for swap, but doesn't say if there will be a secondary swap on disk. Zram uses memory rather than a drive partition as backing, so it's useful for /tmp instead of tmpfs; and also when there isn't a swap partition on the local drive. But if there is a backing device available, zswap uses compression to avoid swap until it can't and then pushes compressed data to swap device. So it moderates the abrupt drop off in performance when transitioning from memory to swap. Zram as swap will postpone that abrupt transition but in the case where it runs out of space, you're going to get that same abrupt fall off when swapping (or oom if no secondary swap is setup). Anyway, I've been using zswap for a year and rarely hit swapping to the backing device. Chris Murphy _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx/message/3SZN74DAH2TOQDAYT7YXWOZCFPVKVTAT/
