Re: nash, cpio and linuxrc
Le jeudi 24 février 2005 à 09:35 +0100, Féliciano Matias a écrit :
Le mercredi 23 février 2005 à 17:07 +0100, Gildas Bayard a écrit :
> Hello,
>
> First of all, please direct me to an other mailing list if I'm going off
> topic.
> I've investigated a bit the initrd system and there are some questions I
> could no find answers for:
> - why are regular desktop distributions always using the initrd system?
It's require for "root=LABEL=/" and udev.
Ok. I'll look at that
deeper. Thanx
> I understand that this system is mandatory to load exotic scsi drivers
> or add a pause when booting to usb but I wonder why it is always used
> - on kernel 2.4 (red hat 9) the initrd image is an ext2 filesystems.
For *your* system. My initrd also contain raid0 and dm-mod
(see /sbin/mkinitrd and "man mkinitrd").
No I mean the initrd file is an
ext2 filesystem (whatever it contains)
On FC3 it is a cpio archive. Why? And why when initrd is a cpio archive
it would not load linuxrc?
Answers to these question are not in man initrd, man nash...
> It
> contains a linuxrc nash script. On kernel 2.6 (fedora 3) the initrd is a
> cpio archive and does not contains a linuxrc script. Could someone
> briefly explain me why these differences? Particularly I wondering about
> 3 things:
> 1) I tried to repack my custom initrd ext2 filesystem into a cpio
> archive and found that when packed as a cpio archive it's not executing
> my linuxrc script (is it the way it's supposed to be?)
use "/init".
Well I want to understand why my linuxrc is not run when in
a cpio
archive and again what the matter with the cpio archive
> 2) What are the differences between pivot_root and switch_root (new in
> 2.6) ?
> 3) Why using nash in the first place?
nash is a mini-mini-mini-shell (bash is TTOOOO big). See "man nash".
man
nash does not explain what is the rational for both pivot_root and
switch_root (just give a small description).
=> Why pivot_root was not enough?
=> Why not wait until the end of linuxrc to jump to the new root fs?
I would like to know how to get in touch with nash coders. On which
forum or mailing list could they be hanging on?
> Could we just wait until the end
> of the linuxrc script? At that time the kernel would move to the new
> root fs (whitout the need for pivot_root or switch_root)
>
> And finally, if I'm right the end of the nash script (after switch_root)
> is never executed?
>
> Gildas
>
--
fedora-devel-list mailing list
fedora-devel-list(a)redhat.com
http://www.redhat.com/mailman/listinfo/fedora-devel-list