cpu:1 pid:1 comm: swapper/0 not tainted

I have pve (root filesystem) installed on zfs raid1 (3 mirrored hdds). I decided to turn off my swap (swapoff -a) and edited fstab file not to load swap at boot time. As I know, I needed to do two more things: 'update-initramfs -u' and 'update-grub'.... but unfortunately at this time we had...