红帽全球峰会A.6. freezer
freezer 子系统可以暂停或者恢复 cgroup 中的任务。
- freezer.state
freezer.state只能用于非 root cgroup 中，它有三个可能的值：FROZEN—— cgroup 中的任务已被暂停。FREEZING—— 系统正在暂停 cgroup 中的任务。THAWED—— cgroup 中的任务已恢复。
如要暂停某一进程：
- 请将该进程移动到已附加
freezer子系统层级的 cgroup 中。 - 冻结此 cgroup 以便暂停其中的进程。
进程不能移至已暂停（已冻结）的 cgroup 中。
请注意：虽然
FROZEN 和 THAWED 值可写入 freezer.state，但 FREEZING 无法被写入，只能读取。
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