提出问题的服务（例如，邮件、dhcp 和内核）和指示消息严重性的类也可以标识消息。

Messages are also identified by the service that raise the issue (for example, mail, dhcp, kernel), and a class indicating the severity of the message.

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所有魔法属性的完整列表位于内核的gbeanmbean类中。

A complete list of all magic attributes resides in the GBeanMBean class in the kernel.

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该调度类类似于一个模块链，协助内核调度程序工作。

The scheduling classes are like a chain of modules assisting the core scheduler.

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