On Thu, Jul 15, 2021 at 09:44:53PM +0200, Michal Such?nek wrote:

quoted

quoted

Well, luckily it seems we anticipated issues like that and added
--skip_encoding_btf_vars argument, which I completely forgot about and
just accidentally came across reviewing Arnaldo's latest pahole patch.
I think that one is a much better solution, as then it will impact
only those that explicitly relies on availability of BTF for per-CPU
variables, which is a subset of all possible uses for kernel BTF. Sent
a patch ([0]), please take a look.

  [0] https://lore.kernel.org/linux-mm/20210530002536.3193829-1-andrii@kernel.org/T/#u (local)

I'm happy to have this patch used as an alternative to forcing 1.22 to
be the minimum version of pahole required.

Is pahole 1.22 available already?

Ultimately it was of less importance because of a0b8200d06ad ("kbuild:
skip per-CPU BTF generation for pahole v1.18-v1.21"). As I write this,
pahole v1.22 has not been tagged.

-- 
Mel Gorman
SUSE Labs