a978ce9484
systemd-udevd appears to drastically increase
Mininet startup time.
With systemd-udevd disabled,
mn --topo single,100 --test none
takes 8s rather than 40s (31s with NM_UNMANAGED) on
my test VM.
We need a way of disabling it globally and always for
Mininet interfaces, but this is a start for github
actions at least.
For now, we execute this command before running the CI tests:
systemctl stop systemd-udevd systemd-udevd-kernel.socket \
systemd-udevd-control.socket
We also restore the "slow" examples tests, including
test_tree1024.