The new kernel is not running well on our main NFS server so another reboot of iglulik, which is the server that provides the /home directories, was required to load a different kernel.  Iglulik is now running the stock Ubuntu 22.04 5.15.0 kernel.  Less than idea but 5.19.12 did not run well on it.  We had CPU stalls but it wasn’t the usual expedited RCU CPU stalls, it was a more generic 2 minute CPU stall that periodically broke NFS.

     Also, I had to switch iptables from legacy to nftables (which uses bpf)) because the legacy iptables is no longer supported.  I had to do this for vps4, vps5, and vps7.