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Add note about setting the force flag for cgroup v1 very new systemd … #2754

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Oct 24, 2024
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Add note about setting the force flag for cgroup v1 very new systemd … #2754

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3 changes: 2 additions & 1 deletion doc/manual/install-judgehost.rst
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Expand Up @@ -164,7 +164,8 @@ any other tasks on the same CPU core the judgedaemon is using:

On modern distros (e.g. Debian bullseye and Ubuntu Jammy Jellyfish) which have
cgroup v2 enabled by default, you need to add ``systemd.unified_cgroup_hierarchy=0``
as well. Then run ``update-grub`` and reboot.
as well. If you are running systemd v257, you also need to add `SYSTEMD_CGROUP_ENABLE_LEGACY_FORCE=1`.
Then run ``update-grub`` and reboot.
After rebooting check that ``/proc/cmdline`` actually contains the
added kernel options. On VM hosting providers such as Google Cloud or
DigitalOcean, ``GRUB_CMDLINE_LINUX_DEFAULT`` may be overwritten
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