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I hadn't heard about CGroupsV2. Apparently it's been in the kernel since 2015. Seems like a better design.

https://thenewstack.io/linux-cgroups-v2-brings-rootless-cont...

https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2...

Every distro had it turned off for ages because turning it on would break docker. So eventually fedora decided docker was never going to added it and turned it on anyway. Then shortly after, docker adds support

Between fedora and docker, it didn't help, that docker made a first release for current fedora version always about a month before fedora was going to make a new release (i.e. with fedora's 6 month release cycle, the corresponding docker release for that fedora version was 5 months late).

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