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In Android, the initial RAM disk stays mounted throughout the entirety of the time the operating system is running. No switch_root/pivot_root takes place.

Is this kind of setup easy to pull off with a desktop distribution of Linux? For instance, could I just make a few changes to the cpio.gz file generated by mkinitcpio on Arch Linux to prevent it from switching the root device and to bind mount directories like /etc, /usr, and such within the RAM-based root filesystem?

  • Unwise specifically for e. g. /etc and /usr. Anything in the RAM disk would be destroyed upon reboot or shutdown, making persistent host configuration or persistent data storage quite problematic. – DopeGhoti Jun 14 '17 at 22:36

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