In place upgrade of 7.4-17 with memtest86 installed to 8.1.4 hangs at
Unpacking zfs-zed (2.2.2-pve1) over (2.1.14-pve1) ...
Setting up memtest86+ (6.10-4) ...
Installing new version of config file /etc/grub.d/20_memtest86+ ...
root@pve3:~# ps -ef | rg '\bmemtest'
root 412929 412928 0...
