linux 休眠唤醒

本文主要是介绍linux 休眠唤醒，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

流程：

• User requests for software suspend
• All the running processes are given the suspend signal
• The devices are frozen so that they don’t change the system state when the snapshot is taken
• The memory image is atomically copied with interrupts disabled
• Frozen devices are awakened so that the image can be written
• The image is written to swap
• Devices are suspended and the system powered off

 以上流程中红色部分代码，会导致在休眠过程中屏幕先灭再亮。

/代码位置： /kernel/linux-5.12.2/kernel/power/hibernate.c
swsusp和suspend2 两种休眠技术流程

http://freesoftwaremagazine.com/articles/hibernate_linux/

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