APPLIED/cmt[S]: Re: [SRU][S][RFC][PATCH 0/2] Enable incremental kernel package rebuilds

[Paolo Pisati]

On Wed, Jul 01, 2026 at 08:12:51PM +0200, Jose Ogando via kernel-team wrote:
> BugLink: RFC only, no Launchpad bug assigned yet.
> 
> SRU Justification:
> 
> [Impact]
> 
> Iterating on Ubuntu kernel patch changes currently requires rebuilding
> more than is necessary after a successful flavour build. This slows down
> local development loops when the object tree can be safely reused and only
> the packaging/install stages need to be rerun.
> 
> This RFC proposes an incremental rebuild workflow for developer use. The
> series adds a rebuild-% target that preserves the flavour object tree while
> invalidating the build/install stamps needed for package regeneration. It
> also adds optional no-BTF local rebuild support, test coverage for the
> workflow, and snapshotting of successful rebuild outputs into a hash-based
> directory so repeated iterations can keep unchanged package names without
> custom versioning.
> 
> Potential use cases:
> 
>   * Iterating upstream stable patchsets
>   * Iterating CVE patches
>   * Future integration with CBD sessions

I manually removed the DEP-8 test (since we don't carry them anymore), while applying the rest.
-- 
bye,
p.