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Re: [Ltib] how does one generate a combined initramfs.cpio.gz image with
Re: [Ltib] how does one generate a combined initramfs.cpio.gz image with an uImage under ltib
Wed, 14 Oct 2009 15:53:05 +0100
Thunderbird 18.104.22.168 (X11/20080707)
You could do it that way, but it breaks the model of each package being
a single entity. Commonly the kernel source is removed after it builds,
so it's quite ugly to do it this way.
It would be better IMHO to try to process this after everything is build
in a similar way to other deployments (like RAMDISK etc). So the
section that currently creates the initramfs would need to be extended
to also "glue" the kernel and dtb together. It would be nice to have an
elegant solution to this.
Newell, James C. wrote:
Thanks for the response. How about a .spec file that modifies the
kernel .config to point to the ltib generated initramfs cpio file and
reruns the kernel build to produce the monolithic uImage? Does that
break the dependency chain in ltib?
-----Original Message----- From: Stuart Hughes
[mailto:address@hidden Sent: Wednesday, October 14, 2009 9:15 AM To:
Newell, James C. Cc: address@hidden Subject: Re: [Ltib] how does
one generate a combined initramfs.cpio.gz image with an uImage
I understand the problem. Unfortunately I've not had time to look
into this though.
The problem is that in a "typical situation" the kernel wants it
filesystem blown out and available to turn info a cpio image and
then linked in. However in a situation where you want the rootfs
to be the initrams, this is not possible as you have not yet built
I believe LTIB correctly builds the initramfs cpio image. The
remaining problem is to get the kernel to recognise this when it
boots. I had hoped you could load and pass this to the bootloader
(u-boot) and have it picked up in the same way that ext2.gz
ramdisks are, but this doesn't seem to work. Alternatively maybe
it's possible to take the raw kernel pieces and "link" the together
to build the composite monolithic image.
Anyhow I've not much experience with this, so these are just ideas.
It would be great to hear from anyone who has good a better idea of
how to do this.
Newell, James C. wrote:
Any suggestions/hints on how to handle generating a combined
initramfs.cpio image with a kernel uImage under ltib. The kernel
build system links the initramfs.cpio file but ltib executes the
kernel spec first then builds the initramfs file. It's a
classic chicken/egg problem.