The freezer subsystem suspends or resumes tasks in a control group.
- freezer.state
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freezer.state has three possible values:
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FROZEN — tasks in the control group are suspended.
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FREEZING — the system is in the process of suspending tasks in the control group.
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THAWED — tasks in the control group have resumed.
Note that while the FROZEN and THAWED values can be written to freezer.state, FREEZING cannot be written, only read.
