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Kernel Complete

理解内核Complete同步机制

一、参考文档
二、示例代码
三、代码测试步骤

一、参考文档

Linux内核同步机制之completion

二、示例代码

https://github.com/ZengjfOS/RaspberryPi/tree/complete

三、代码测试步骤

mknod /dev/complete c 255 0

file /dev/complete

/dev/complete: character special (255/0)

分别在两个shell中运行
- cat /dev/complete
- echo 0 > /dev/complete

dmesg -w

[14786.558343] process 6400 (cat) going to sleep
[14794.944539] process 5460 (bash) awakening the readers...
[14794.944579] awoken 6400 (cat)