Summary of Linux Device Drivers (III): 5. Blocking I/O implementation

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Font size: big, medium, and small blog Linux Device Driver Summary (3): 5. Blocking I/O implementation () reprinted label: Linux Style
Category: 3. Implementation of devices of the optimized type

Summary of Linux Device Drivers (III): 5. Blocking I/O implementation

Bytes

1. Introduction to sleep:

Process sleep. Simply put, a running process gets out of the CPU. The sleeping process will be shelved by the kernel. Only when the kernel wakes up the sleeping process again will the process run on the CPU again. This is the process scheduling in the kernel, which will be introduced in later sections.

We should first know this concept that a CPU is at the same time.