I've been reading various tutorials of the boot process but still am not clear. I don't care about grub stage 1 and 1.5. I care at the starting point of when the root filesystem is loaded into VFS(Virtual filesystem), who is loading it, and from that point on.

1) Does grub load the root filesystem(read only) into VFS?
2) Does the kernel load the root filesystem(read only) into VFS?
3) Does INIT load the root filesystem(read only) into VFS?

after this is concluded....

Does INIT or the Kernel create the real root filesystem(rw)...right before the pivot.root?

By the way...I do not use initrd

1. Grub does not load the VFS. Grub loads BIOS. Edited: Grub does not load BIOS but informs BIOS where the MBR is.
2.No clue.
3.I highly doubt it.

Your questions are WAY beyond your knowledge at this point. I suggest you study the boot process considerably more. I have not studied this for a while but...

BIOS is basically a mini O.S stored in a circuit thats major purpose is to load the real O.S.
Grub points the CPU so it can find BIOS. Grub and BIOS are a lot more simpler than when the kernel takes over. I think BIOS just gets it started and part of the kernel boot straps the rest of it's self.

Some one more knowledgable will probably post but until then this outline should get your thread rolling.

You got that backwards...bios loads grub. and in my original post i don't care about that portion.

I was looking for an answer..."not my questions are WAY beyond your knowledge at this point". I have read plenty of tutorials. not to you since you don't know and i rather not hear you pretend to know...but to others:

Some tutorials have states grub takes the read only rootfs and loads it in vfs.


Some tutorials have stated the kernel takes the read only rootfs and loads it in vfs.

Some tutorials have implied that the init process creates the read only rootfs.


so this is the point where i am seeking answers, please.

1 members found this post helpful.

I have a heap of my own problems and I did not mean to be insulting in anyway. I could not ever find any documents that explained the kernels end to any reasonable extent so it might help to know that it is not easy. Doing a search on Ram Disks might lead to something because Grub is limited.

http://docs.google.com/viewer?a=v&q=...VZmK4hocAm6owg


http://www.cromwell-intl.com/unix/linux-boot.html

http://www.xs4all.nl/~lennartb/bootloaders/node3.html Most comprehensive Link.

These links are connected to Booting in general so you will have to sift through them.

You may have already seen this page but just in case it gives you some other search options.Init for one.


http://en.wikipedia.org/wiki/Linux_startup_process