[klibc] Linux early userspace doubts

[Prashant Batra]

Thanks Maks,

One more doubt-

Can I have the same ramfs image be used either as built-into the kernel(part
of vmlnuz) or supplied externally using initrd command on grub and hence as
kernel parameter?


Regards,
Prashant


On Mon, Jul 4, 2011 at 6:17 PM, maximilian attems <max at stro.at> wrote:

> hello,
>
> On Mon, Jul 04, 2011 at 06:05:07PM +0530, Prashant Batra wrote:
> >
> > I am a newbie into kernel booting process.
> > I have read few things about boot process of the linux kernel. I am stuck
> at
> > few things, which I am confident, someone from the list might help on -
> >
> >
> >    - If I pass a ramfs image as an intrd paramter from the bootloader
> (say
> >    grub), then will the kernel treat this as a ramfs image only?
>
> no.
> it will check if initramfs or initrd and consequently unpack.
>
> >    - initrd image is also, packed using cpio archive, then how does the
> >    kernel come to know that this is an initrd ot initramfs image. Is
> there some
> >    type information included and if yes, how can I see that from a linux
> >    command.
>
> initrd is a fs image, like cramfs or ext2 or such, so aboves is wrong.
> and please you don't want initrd, they are as dead as 2.4 kernel.
>
> >    - While building initrd/initramfs, how are the things to be included
> into
> >    the image chosen.
>
> see for example how kinit does it in klibc or initramfs-tools
> git clone git://git.kernel.org/pub/scm/libs/klibc/klibc.git
> or
> git clone git://anonscm.debian.org/kernel/initramfs-tools.git
>
> (Aboves assume you have git installed)
>
> > Thanks in advance.
> >
> > P.S. If this is not the right place to post the question, could you
> please
> > point a more appropriate list.
>
> you might want to look at lwn.net and initramfs for the initial
> discussions,
> current mailing list is initramfs at vger.kernel.org
>
>
> kind regards
>
> --
> maks
>



-- 
Prashant Batra
Follow the dreams!!
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