linux-kernel - Re: [PATCHv3 0/2] perf/bpf: Replace deprecated code

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Date:   Mon, 28 Feb 2022 17:49:55 -0800
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        "linux-perf-use." <linux-perf-users@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, Andrii Nakryiko <andrii@...nel.org>
Subject: Re: [PATCHv3 0/2] perf/bpf: Replace deprecated code

On Thu, Feb 24, 2022 at 7:52 AM Jiri Olsa <jolsa@...nel.org> wrote:
>
> hi,
> the original patchset [1] removed the whole perf functionality
> with the hope nobody's using that. But it turned out there's
> actually bpf script using prologue functionality, so there
> might be users of this.
>
> v3 changes:
>   - sending priv related changes, because they can be already
>     merged, the rest will need more discussion and work
>
>   - this version gets rid of and adds workaround (and keeps the
>     current functionality) for following deprecated libbpf functions:
>
>       bpf_program__set_priv
>       bpf_program__priv
>       bpf_map__set_priv
>       bpf_map__priv
>
>     Basically it implements workarounds suggested by Andrii in [2].
>

LGTM, for the series:

Acked-by: Andrii Nakryiko <andrii@...nel.org>

> Also available in here:
>   git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
>   bpf/depre
>
> thanks,
> jirka
>
>
> [1] https://lore.kernel.org/linux-perf-users/YgoPxhE3OEEmZqla@krava/T/#t
> [2] https://lore.kernel.org/linux-perf-users/YgoPxhE3OEEmZqla@krava/T/#md3ccab9fe70a4583e94603b1a562e369bd67b17d
> ---
> Jiri Olsa (2):
>       perf tools: Remove bpf_program__set_priv/bpf_program__priv usage
>       perf tools: Remove bpf_map__set_priv/bpf_map__priv usage
>
>  tools/perf/util/bpf-loader.c | 164 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------------
>  1 file changed, 141 insertions(+), 23 deletions(-)