On Mon, 6 Nov 2006 17:42:54 +0900 somez72 wrote:

| In x86 system, kenel and root file system can run on only
| ramdisk(/dev/ram0 ) just like embedded board?
| my root file system and kernel is only 20 Mbyte ... so I want to run it
| only ramdisk..
|
|
| Could you someone advice me... about ramdisk booting on X86?

It can be done. Initial ram disk is the usual means. The boot loader
provides both the kernel image and a disk image. The kernel allocates
the ramdisk space with an initial value of that disk image and mounts
it as root before starting the first program.

There is also another method that might be of interest. It is called
"early user space". It involves files in RAM, too, but not in the form
of a disk emulated filesystem. It basically integrates a cpio image of
some files into the kernel image (you have to rebuild it) and loads them
into rootfs (basically the same as ramfs) before starting the first
program.

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| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
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