Enable ZRAM on Raspberry pi 4 and up

Full details from here tl:dr - Works on Raspberry pi 4 and above, Ubuntu 22. I was able to cobble it to sorta work on an Rpi3. Rpi2 is a no-go. It does seem to help performance. sudo apt install -y linux-modules-extra-raspi sudo apt install -y zram-tools sudo apt autoremove --purge -y zram-config sudo vi /etc/default/zramswap sudo sed -i -e 's/zswap.enabled=1/zswap.enabled=0/' /boot/firmware/cmdline.txt sudo reboot in /etc/default/zramswap change: `ALGO=zstd `PERCENT=50 `PRIORITY=100 zramctl to check status