Thread: [Announce] N9 Multiboot - Harmattan, Nemo & Nitdroid
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Hurrian is offline Hurrian
2012-12-04 , 12:35
Posts: 1,225 | Thanked: 1,905 times | Joined on Feb 2011 @ Quezon City, Philippines
#41
Originally Posted by juiceme View Post
Some thoughts;
  • Does the partition name have to be "var", or will something in the system break if I change it to something else entirely. Just a cosmetic thing but if it is to be holding boot related stuff rather than /var/ then it might be nice to call it something else... forex. "rescue"
Not necessarily, however for naming's sake (the partition name is set in the MTD partition table), let's make the UBIFS partition use "var" as the name.

(NOTE: ubi.mtd kernel parameter sets the mtd device to pass to ubiattach; it must always be "var". ubi0:$x (where $x is the UBIFS label) can be anything. However, again, for naming's sake, let's keep it names var.)

Originally Posted by juiceme View Post
  • I am still thinking about which is the best launching order for the rest of the system... whether to use Harmattan/Nitdroid kernel as the first stage boot and then kexec other images from that, or have own small subsytem like the MOSLO booter kernel+initramfs which then would kexec further images if needed.
The MOSLO booter is practically the same thing as a Harmattan-NITDroid kernel+utilites in /var.

OH, and this will not use an initramfs! It's not a ramdisk, the first kernel will boot into a barebones complete system on /var, then kexec into a new system!

It would make very little difference either way, as both first-stage kernels would have their own root filesystem (ubi0:var), and kexec a second-stage kernel (Harmattan PR1.3, NITDroid or Nemo) into their respective root filesystem.

Originally Posted by juiceme View Post
  • The mtd4 partition is indeed a nice place to set up stuff, I thought of maybe putting all the kernels and initramfs/initrd's there. It would be easy to load them up from there, each with tailored command line to set up the rest of the system.
    Having full debian environment there is also a nice idea, currently I use a loop-mounted HARM-CHOM image which is 2G of size but a lot smaller filesystem is OK
It could be mounted to /boot for convenience's sake.
A reference entry is already provided in /etc/fstab, however it is not mounted by default at boot.

You will need to call ubiattach and mount by yourself (or add the needed lines in /etc/init/mount-home.conf)

__________________
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.
Last edited by Hurrian; 2012-12-04 at 12:46.