Which file in a cgroup directory contains the list of processes belonging to this cgroup?

The correct answer is C. procs. The file procs in a cgroup directory contains the list of processes belonging to this cgroup. Each line in the file shows the PID of a process that is a member of the cgroup. A process can be moved to a cgroup by writing its PID into the cgroup's procs file. For example, to…

303.4 Operations Security

Question

Which file in a cgroup directory contains the list of processes belonging to this cgroup?

Options

Apids
Bmembers
Cprocs
Dcasks
Esubjects

How the community answered

(41 responses)

A
2% (1)
B
12% (5)
C
76% (31)
D
7% (3)
E
2% (1)

Explanation

The file procs in a cgroup directory contains the list of processes belonging to this cgroup. Each line in the file shows the PID of a process that is a member of the cgroup. A process can be moved to a cgroup by writing its PID into the cgroup's procs file. For example, to move the process with PID 24982 to the cgroup cg1, the following command can be used: echo 24982 > /sys/fs/cgroup/cg1/procs. The file procs is different from the file tasks, which lists the threads belonging to the cgroup. The file procs can be used to move all threads in a thread group at once, while the file tasks can be used to move individual threads.

Topics

#cgroups#process management#Linux namespaces#container isolation

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