Re: [PATCH v6 4/4] meta: Deploy DTBs once per kernel

[Baurzhan Ismagulov <ibr@radix50.net>]

On 2026-02-13 09:01, 'Jan Kiszka' via isar-users wrote:
> > Task do_copy_boot_files deploys DTB files into the same location for
> > different images (e.g., isar-image-base and isar-image-ci). This causes
> > a build error.
> > 
> > do_copy_boot_files is called once for every image recipe while dtb files
> > belong to the kernel which is the same for both images. Performing dtb
> > deployment once for the same kernel solves the issue.
> 
> This remains inconsistent: DTBs are just another artifact of the kernel.
> The kernel image itself is also deployed via the image recipe. Why is
> there no conflict is because of image-specific file names being used. We
> can't change the DTB file names, but we could put them in image-specific
> deployment folders, for the case that multiple images are pushed into
> the same deployment folder.
> 
> Again: NAK, wrong approach, please finally process my feedback.

v6 has been sent for documenting the reasons in the archive as previously
announced; I think we can solve this without escalating.

Now that you've shared your proposal of splitting by image -- that's an option
and we can discuss it.

Our use case is:
1. Two images, same dtb name, same dtb contents.
2. Downstream already has many deliverables.

My underlying question: Should we always duplicate, or should we at least try
to identify cases where we can avoid duplication? "Same file -- single
deployment".

Patch 4 "deploy dtb once per kernel" associates the dtb with the recipe
producing it, reducing shuffling around in the image recipe. Yes, the kernel is
still deployed in the image which is inconsistent at this step; I'd be fine
doing that later.

We'll try playing with splitting by image. Even if we end up doing it at this
time, I'd still propose to explore the other options step by step.

With kind regards,
Baurzhan

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