Re: [PATCH v3 dwarves 0/2] pahole: add BTF layout encoding feature

On Thu, Apr 2, 2026 at 1:01 AM Alan Maguire <[email protected]> wrote:
>
> On 26/02/2026 08:52, Alan Maguire wrote:
> > A soon-to-arrive v9 series will add support to add BTF layout
> > information to BTF; this describes the BTF kinds known about at
> > time of encoding in order to support parsing even in cases where
> > the kinds are not known to the parser; the layout relates a
> > BTF kind to the amount of space it consumes via an optional single
> > element following the BTF type or a set of vlen-specified objects.
> >
> > This series implements the support for the BTF "layout" feature
> > but does not require the libbpf changes to support it; the feature
> > test uses a weak declaration of btf__new_empty_opts() to handle the
> > unsupported case.
> >
> > To test pahole with this feature, the following approach can be used;
> >
> > 1. Specify -DLIBBPF_EMBEDDED=OFF option to cmake
> > 2. Install latest libbpf with associated patch series with layout support
> >
> > Alternatively with embedded libbpf the changes can be applied to
> > the embedded libbpf in lib/bpf/src.
> >
> > Changes since v2 [1]:
> >
> > - Resynced, renamed kind_layout -> layout
> > - Avoid encoding layout info in split BTF since it is a waste of space
> >
> > Changes since v1 [2]:
> >
> >  - Resynced with latest pahole
> >
> > [1] https://lore.kernel.org/dwarves/[email protected]/
> > [2] https://lore.kernel.org/dwarves/[email protected]/
> >
>
> Now that the kernel/libbpf side has landed, I'm aiming to land the pahole side shortly.
> We'll need to resync with libbpf when it is synced on github too, but for now it would
> be good to get these patches in; unless anyone objects I'll do this today. Thanks!

Ship it. You could have landed it the same day kernel patches landed.
There was no need for delay.