mirror of https://github.com/mkerrisk/man-pages
cgroups.7: A cgroup v1 controller can't be mounted against multiple hierarchies
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -208,6 +208,20 @@ mount \-t cgroup \-o all cgroup /sys/fs/cgroup
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.IR "\-o all" ,
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since it is the default if no controllers are explicitly specified.)
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It is not possible to mount the same controller
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against multiple cgroup hierarchies.
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For example, it is not possible to mount both the
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.I cpu
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and
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.I cpuacct
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controllers against one hierarchy, and to mount the
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.I cpu
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controller alone against another hierarchy.
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It is possible to create multiple mount points with exactly
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the same set of comounted controllers.
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However, in this case all that results is multiple mount points
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providing a view of the same hierarchy.
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Note that on many systems, the v1 controllers are automatically mounted under
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.IR /sys/fs/cgroup ;
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in particular,
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