On Sat, 02 Jan 2021 10:26:44 -0800, Dave Taht said:
> systemd is supposed to set fq_codel for you in /etc/sysctl.conf or
> elsewhere, for your ethernet.

"D'Oh!" - H. Simpson.

Turns out it went pear-shaped before systemd got its grubby little paws on it.

% zgrep -i fq_codel /proc/config.gz 
CONFIG_NET_SCH_FQ_CODEL=m
CONFIG_DEFAULT_FQ_CODEL=y
CONFIG_DEFAULT_NET_SCH="fq_codel"

No joy can come from this.  :)