On Fri, Sep 18, 2020 at 1:41 PM Hao Luo <haoluo@xxxxxxxxxx> wrote:
>
> Previous commit f3d9054ba8ff ("btf_encoder: Teach pahole to store
> percpu variables in vmlinux BTF.") introduced a feature in btf_encoder
> that encodes global symbols in BTF. However, this feature is not
> protected by any flag. In order to avoid surprises after Pahole v1.18
> rolls out, make this feature off by default and enable only upon
> request. On the kernel side, we can add a Kconfig to enable this
> new capability on an opt-in pattern.
I think I've missed some earlier discussions and motivation for opt-in.
Why opt-out is a problem?
I would think the kernel build should always include percpu vars.
