Has anyone here used zswap on their servers? I've been hunting for information comparing zswap performance to zram (which I've used heavily) but I can't seem to find much beyond high level comparisons between the two. I'm interested because zswap avoids the LRU inversion problem that zram seems to suffer from by paging least-recently-used pages out to backing storage instead of hoarding them in compressed ram while writing new pages to disk. In theory this should yield better performance once the compressed swap becomes full and I'd like to start over-committing some of my machines that host guest VMs and containers without absolutely tanking performance during peak mem usage. If anyone has experience here I'd love to hear it. I'm also willing to run comparisons between the two myself, but I'm not sure exactly how to design the testing scenario or what metrics to collect to make the comparison beyond, say, screenshots of netdata during testing.