965de92b37 changed the default cgroup mode which
exposes an issue in init.d/cgroups.in.
While mount_cgroups defaults to 'unified' if rc_cgroup_mode is unset, cgroup2_controllers
has no default and therefore has a mismatch with the logic in mount_cgroups. The
two should be consistent so the flow makes sense, as mount_cgroups expects a certain
path to be taken in cgroup2_controllers.
Make cgroup2_controllers default to 'unified' if rc_cgroup_mode is unset, just
like mount_cgroups.
Bug: https://bugs.gentoo.org/916964
Thanks-to: acab@digitalfuture.it
The cgroups v2 setup required the rc_cgroups_controllers variable
to be set to the list of controllers to enable regardless of whether the
mode was hybrid or unified.
This makes sense for hybrid mode since the controllers can't be in both
the cgroups v1 and v2 hierarchies, but for unified mode we should enable
all controllers that are configured in the kernel.
Kanako the Gay