[yocto] initramfs image

[Andrea Adami]

On Wed, May 9, 2012 at 8:18 PM, Darren Hart <dvhart at linux.intel.com> wrote:
>
>
> On 05/08/2012 06:54 PM, Manuel Bessler wrote:
>> Hi,
>>
>> I'm trying to figure out how to build an image of type initramfs, ie.
>> kernel with built-in rootfs.
>> I've got a rootfs.cpio.gz in build/tmp/deploy/images. But how do I
>> tell the kernel to actually use it
>> and "swallow in" the rootfs.
>
> This isn't currently supported. The problem is the kernel would have to
> wait for the image to be completed, and the image currently waits for
> the kernel to be completed. In practice, this is often done in two
> stages, the kernel is built, the rootfs is built, then the kernel is
> rebuilt. This workflow has not been configured for OE/Yocto yet. If this
> is an important feature for you, please consider opening a feature request.
>
> Regards,
>
> Darren Hart
>
>>
>> I've found a few variable that have to do with initramfs', but there
>> are no simple examples,
>> and for some variables I've not found any examples nor documentation at all.
>>
>> in  .../images/myimage-initramfs.bb I have:
>> require myimage.bb
>> INITRAMFS_FSTYPES = "cpio.gz"
>> IMAGE_FSTYPES = "${INITRAMFS_FSTYPES}"
>>
>> In the same file I tried to set INITRAMFS_IMAGE to:
>> INITRAMFS_IMAGE = "myimage "
>>
>>
>> Do I need to set CONFIG_INITRAMFS_SOURCE in my kernel config manually,
>> and if yes, to what?
>> My kernel recipe is (for now) a simple kernel build, ie "inherit
>> kernel"-based only.
>>
>> Am I using INITRAMFS_IMAGE the right way? What about INITRAMFS_TASK ?
>> I could not find any information on this variable....
>>
>> I'm using yocto 1.2.
>>
>>
>> Does anyone have a simple example on how to build a kernel with
>> initramfs built in?
>>
>> I'd appreciate any help.
>> Thanks,
>> Manuel
>> _______________________________________________
>> yocto mailing list
>> yocto at yoctoproject.org
>> https://lists.yoctoproject.org/listinfo/yocto
>
> --
> Darren Hart
> Intel Open Source Technology Center
> Yocto Project - Linux Kernel
> _______________________________________________
> yocto mailing list
> yocto at yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto


I think I've answered a similar question last week.

Pls. see  this thread:
https://lists.yoctoproject.org/pipermail/yocto/2012-May/008625.htmlsimilar
question was answ

Regards

Andrea