netdev - Re: [PATCH 00/14] bpf: Add trampoline and dispatcher to /proc/kallsyms

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Message-ID: <CAJ+HfNhBDU9c4-0D5RiHFZBq_LN7E=k8=rhL+VbmxJU7rdDBxQ@mail.gmail.com>
Date:   Mon, 10 Feb 2020 16:51:08 +0100
From:   Björn Töpel <bjorn.topel@...il.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Andrii Nakryiko <andriin@...com>, Yonghong Song <yhs@...com>,
        Song Liu <songliubraving@...com>,
        Martin KaFai Lau <kafai@...com>,
        Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...hat.com>,
        Björn Töpel <bjorn.topel@...el.com>,
        John Fastabend <john.fastabend@...il.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>
Subject: Re: [PATCH 00/14] bpf: Add trampoline and dispatcher to /proc/kallsyms

On Sat, 8 Feb 2020 at 16:42, Jiri Olsa <jolsa@...nel.org> wrote:
>
> hi,
> this patchset adds trampoline and dispatcher objects
> to be visible in /proc/kallsyms. The last patch also
> adds sorting for all bpf objects in /proc/kallsyms.
>

Thanks for working on this!

I'm probably missing something with my perf setup; I've applied your
patches, and everything seem to work fine from an kallsyms
perspective:

# grep bpf_dispatcher_xdp /proc/kallsyms
...
ffffffffc0511000 t bpf_dispatcher_xdp   [bpf]

However, when I run
# perf top

I still see the undecorated one:
0.90%  [unknown]                  [k] 0xffffffffc0511037

Any ideas?
Björn