Am Freitag, 15. Februar 2002 13:29 schrieben Sie: > On Fri Feb 15, 2002 at 11:52:47AM +0100, Stephan Linz wrote: > > Hi Folks, > > > > since the last two days I've tried to make a so named "change_root" > > mechanism with support of kernels sysctrl > > (/proc/sys/kernel/real-root-dev) inside of a minimal initrd image. I use > > kernel 2.2.19 so I can't use the newer "pivot_root" mechanism. In kernel > > documentation initrd.txt says I have to write the major-minor code of the > > new root FS into the virtuell file /proc/sys/kernel/real-root-dev, but > > nothing is going on. Here my boot strategy (all things at x86 plattform): > > > > BIOS boots from first master IDE device (LILO). LILO loads kernel and > > initrd image. Kernel mounts initrd image as first root FS in > > ramdisk(/dev/ram0); in lilo.conf is standing: append="root=/dev/ram > > init=/linuxrc rw". Initrd image > > Lose the root=/dev/ram init=/linuxrc stuff. The initrd will do > what you want without that... > > > covers a small busybox, /linuxrc is a shellscript and has to mount > > /dev/hda1, extract the real root FS from a tarball to /dev/ram1, unmount > > /dev/hda1 and mount /dev/ram1 as new root FS. So at the end of /linuxrc I > > write: > > > > mount -t proc /proc /proc > > echo 0x101 >/proc/sys/kernel/real-root-dev > > exec /sbin/init > > Drop the mount /proc and the exec. Just leave the echo, and let > the /linuxrc script exit, at which point the kernel will mount > /dev/ram1 as root, remount your initrd as /initrd in your new > root (if you have that directory), and exec /sbin/init on > /dev/ram1 (which is now your root device)
How and where in the new root FS I have to remount initrd and exec /sbin/init. Must be there another /linuxrc ? That's the point I don't understand :-( Stephan PS: Sorry for the mail spam of me, but wast.org has send back some different errors, so I posted again and agein. > > -Erik > Erik B. Andersen http://codepoet-consulting.com/ > --This message was written using 73% post-consumer electrons-- -- ====================================================================== Stephan Linz Software Engineer MAZeT GmbH Email: mailto:[EMAIL PROTECTED] Branche office Jena Phone: +49-3641-2809-55 Göschwitzer Straße 32 Fax : +49-3641-2809-12 D-07745 JENA Germany Visit our web-pages: http://www.MAZeT.de ====================================================================== -- To unsubscribe from this list, send a message to [EMAIL PROTECTED] with the command "unsubscribe linux-embedded" in the message body. For more information, see <http://waste.org/mail/linux-embedded>.
