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Linux的suspend机制的设计原理

Linux中实现了suspend-to-disk的机制，由pm_suspend_disk来完成，有网友问了一个问题：SMP在进入suspend(standby)模式的时候，各平台通用的电源管理代码会先把除了引导cpu以外的其他cpu都关掉，然后引导cpu自己再进入睡眠。当睡眠结束的时候，引导cpu会...

Linux的suspend机制的设计原理（续）--cpu的热插拔

前面简单谈了一下linux的suspend机制的实现，其主要思想就是，启动cpu外的别的cpu都不关闭，而是进入idle然后进入play_dead中执行halt，我们知道halt只有中断可以唤醒，可是醒了以后发现该cpu为dead状态，那么仍然进入halt，如果将设备也停了，那么该cpu就一直hal...

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更新时间 2023-04-12 10:33:00

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