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On Mon, May 16, 2011 at 6:45 AM, Pandu Poluan <pandu@××××××.info> wrote: |
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> What's rootfs? |
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|
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/usr/src/linux/Documentation/filesystems/ramfs-rootfs-initramfs.txt |
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|
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[snip] |
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What is rootfs? |
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--------------- |
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Rootfs is a special instance of ramfs (or tmpfs, if that's enabled), which is |
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always present in 2.6 systems. You can't unmount rootfs for approximately the |
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same reason you can't kill the init process; rather than having special code |
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to check for and handle an empty list, it's smaller and simpler for the kernel |
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to just make sure certain lists can't become empty. |
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Most systems just mount another filesystem over rootfs and ignore it. The |
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amount of space an empty instance of ramfs takes up is tiny. |
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[/snip] |
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