对不能进入或保持睡眠状态的一个笼统的称谓是失眠——就像患者们知道的——是一个严重的问题。

A catch-all term for the inability to fall or stay asleep, insomnia is — as sufferers know — a very serious problem.

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它将处于可终止睡眠状态的调用进程置于 queue 中，直到 condition 等于 true。

h; it puts the calling process to sleep killably in queue until the condition evaluates to true.

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将进程置为睡眠状态的普通方法是将进程状态设置为TASK_INTERRUPTIBLE或TASK_UNINTERRUPTIBLE并调用调度程序的schedule函数。

The normal way to put a process to sleep is to set the process's state to either TASK_INTERRUPTIBLE or TASK_UNINTERRUPTIBLE and call the scheduler's function schedule .

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