ramdisks, anyone?

[Martin Costabel]

Mayan Moudgill wrote:
> 
> I am trying to build a small initrd, with a linuxrc that does something.
> Does somebody have such a ramdisk.image available?
> Or even some suggestions on what to do?
> 
> I started off by trying to make bash my /linuxrc. Bash
> required ld.so.1, which required libc.so.2, etc....
> 
> This occupied more the 4MB. At that point the /dev/ram on the
> machine I was building the ramdisk started giving problems -
> If I built a bigger /dev/ram, after umount, dd would only
> read the first 4MB.  is there something magical about 4M for ramdisks?

Yes. If you want more than 4M, let's say 8M, you have to boot with a
kernel argument ramdisk_size=8192. If you have kernel sources installed,
you can read about this in /usr/src/linux/Documentation/ramdisk.txt.

--
Martin

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