netdev - Re: [PATCH v2 bpf-next 00/14] bpf: Support calling kernel function

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Message-ID: <CACAyw99gXvpnCwkz4vniABV5OQ29BE2K2iJY0tB898Fd9_8h6Q@mail.gmail.com>
Date:   Mon, 29 Mar 2021 17:06:26 +0100
From:   Lorenz Bauer <lmb@...udflare.com>
To:     Martin KaFai Lau <kafai@...com>
Cc:     Cong Wang <xiyou.wangcong@...il.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        kernel-team <kernel-team@...com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 bpf-next 00/14] bpf: Support calling kernel function

On Mon, 29 Mar 2021 at 02:25, Martin KaFai Lau <kafai@...com> wrote:
>
> > > >
> > > > # pahole --version
> > > > v1.17
> > >
> > > That is the most likely reason.
> > > In lib/Kconfig.debug
> > > we have pahole >= 1.19 requirement for BTF in modules.
> > > Though your config has CUBIC=y I suspect something odd goes on.
> > > Could you please try the latest pahole 1.20 ?
> >
> > Sure, I will give it a try tomorrow, I am not in control of the CI I ran.
> Could you also check the CONFIG_DYNAMIC_FTRACE and also try 'y' if it
> is not set?

I hit the same problem on newer pahole:

$ pahole --version
v1.20

CONFIG_DYNAMIC_FTRACE=y resolves the issue.

-- 
Lorenz Bauer  |  Systems Engineer
6th Floor, County Hall/The Riverside Building, SE1 7PB, UK

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