cgroup: provide cgroup_nov1= to disable controllers in v1 mounts

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Testing cgroup2 can be painful with system software automatically
mounting and populating all cgroup controllers in v1 mode. Sometimes
they can be unmounted from rc.local, sometimes even that is too late.

Provide a commandline option to disable certain controllers in v1
mounts, so that they remain available for cgroup2 mounts.

Example use:

cgroup_no_v1=memory,cpu
cgroup_no_v1=all

Disabling will be confirmed at boot-time as such:

[    0.013770] Disabling cpu control group subsystem in v1 mounts
[    0.016004] Disabling memory control group subsystem in v1 mounts

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

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This commit is contained in:

Johannes Weiner 2016-02-11 13:34:49 -05:00 • committed by Tejun Heo

parent e11b956e9e

commit 223ffb29f9

1 changed files with 42 additions and 1 deletions

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kernel/cgroup.c

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