When ZSWAP is disabled, the `Zswap` and `Zswapped` in meminfo are still non-zero. IOW, ZSWAP doesn't free memory upon being disabled. Stumbled upon this while trying to figure out where did ≈4G of my SWAP memory disappear. Been seeing some unknown memory in SWAP for years, now I suspect ZSWAP might be the culprit. But no way to know for sure because of this bug. # Steps to reproduce 1. Enable ZSWAP 2. Wait for `grep Zswap /proc/meminfo` to become non-zero 3. Disable ZSWAP via `sudo sh -c "echo 0 > /sys/module/zswap/parameters/enabled"` 4. Look at `grep Zswap /proc/meminfo` ## Expected The rows are zero because ZSWAP is disabled. ## Actual The rows doesn't change. # Additional information Kernel: 6.11.3 OS: Archlinux
