本文探讨了数字相关通道失效实时自动切换的几种实现方法，着重失效信号的检测和切换指令的产生。

In this article several methods for implementation of the real-time automatic changeover of the digital related channels in failure are discussed.

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要执行这些指令，您必须切换到内核上下文。

To execute these instructions, you need to switch to the kernel context.

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由此造成的上下文切换相对于锁保护的少数几条指令来说，会造成相当大的延迟。

The resulting context switches can cause a significant delay relative to the few instructions protected by the lock.

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