L4T如何开启overlayfs

Autonomous Machines Jetson & Embedded Systems Jetson Orin NX
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我们的设备上需要做一个恢复出厂的功能，是需要rootfs只读，使用overlayfs挂载另一个分区到rootfs之上
SDK中是已经支持此功能吗，我看到启动日志中打印overlayfs的设置是关闭的，请问如何打开？

[    1.989668] Checking overlayfs setting...
[    1.999264] Overlayfs is disabled...
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https://docs.nvidia.com/jetson/archives/r36.2/DeveloperGuide/SD/RootFileSystem.html?highlight=overlayfs#overlayfs-on-root-file-system

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