linux-kernel - Re: [PATCH v2 0/3] Assume libbpf 1.0+

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Message-ID: <CAP-5=fXnzaJfbuNBt=5ETjiNmYzTmkJPc+-iCKr_29mssFRZWQ@mail.gmail.com>
Date:   Thu, 19 Jan 2023 10:12:55 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Andres Freund <andres@...razel.de>,
        Quentin Monnet <quentin@...valent.com>,
        Roberto Sassu <roberto.sassu@...wei.com>,
        Christy Lee <christylee@...com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        bpf@...r.kernel.org, Michael Petlan <mpetlan@...hat.com>,
        Ben Hutchings <ben@...adent.org.uk>
Subject: Re: [PATCH v2 0/3] Assume libbpf 1.0+

On Thu, Jan 19, 2023 at 9:47 AM Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
>
> Em Thu, Jan 19, 2023 at 02:41:12PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Anyway, just a data point, I'll check if I'm missing installing it
> > somewhere.
>
> Just asked for libbpf-dev to be installed on the debian:11 container:
>
> [perfbuilder@...e 11]$ dsh debian:11
> $ bash
> perfbuilder@...d1572e8cf:/$ ls -la /usr/lib/x86_64-linux-gnu/libbpf.so.0
> lrwxrwxrwx. 1 root root 15 Jan 10  2021 /usr/lib/x86_64-linux-gnu/libbpf.so.0 -> libbpf.so.0.3.0
> perfbuilder@...d1572e8cf:/$ dpkg -l | grep bpf
> ii  libbpf-dev:amd64                   1:0.3-2                        amd64        eBPF helper library (development files)
> ii  libbpf0:amd64                      1:0.3-2                        amd64        eBPF helper library (shared library)
> ii  libpfm4:amd64                      4.11.1+git32-gd0b85fb-1        amd64        Library to program the performance monitoring events
> perfbuilder@...d1572e8cf:/$
>
> - Arnaldo

Right, the old/ancient libbpf-s are gross, but Debian doesn't use
LIBBPF_DYNAMIC which also isn't a default build option. I guess we
could say there's some testing impact from this cleanup, but I'm not
sure we care.

Thanks,
Ian