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2.11.2. Finding a Subsystem
To find out what subsystems are available in your kernel and how they are mounted together into hierarchies, run:
~]$ cat /proc/cgroups
#subsys_name hierarchy num_cgroups enabled
cpuset 2 1 1
ns 0 1 1
cpu 3 1 1
cpuacct 4 1 1
memory 5 1 1
devices 6 1 1
freezer 7 1 1
net_cls 8 1 1
blkio 9 3 1
perf_event 0 1 1
net_prio 0 1 1
In the example output above, the
hierarchy column lists IDs of the existing hierarchies on the system. Subsystems with the same hierarchy ID are attached to the same hierarchy. The num_cgroup column lists the number of existing cgroups in the hierarchy that uses a particular subsystem. The enabled column reports the value of 1 if a particular subsystem is enabled, or 0 if it is not.
Or, to find the mount points of particular subsystems, run:
~]$ lssubsys -m subsystems
where subsystems is a list of the subsystems in which you are interested. Note that the
lssubsys -m command returns only the top-level mount point per each hierarchy.
