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Date: Thu, 4 Jun 2026 10:29:32 -0300
From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ian Rogers <irogers@google.com>
Cc: Michael Jeanson <mjeanson@efficios.com>, linux-kernel@vger.kernel.org,
	linux-perf-users@vger.kernel.org,
	Adrian Hunter <adrian.hunter@intel.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Derek Foreman <derek.foreman@collabora.com>,
	Ingo Molnar <mingo@redhat.com>,
	James Clark <james.clark@linaro.org>, Jiri Olsa <jolsa@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH v3] perf data ctf: replace libbabeltrace with
 babeltrace2-ctf-writer
Message-ID: <aiF9vEuU2A3m0gUq@x1>
References: <20260512194710.162215-1-mjeanson@efficios.com>
 <20260520191452.218717-1-mjeanson@efficios.com>
 <CAP-5=fUehWvDZB+u1wYGMRa1WD8SUQMqzPqyQB4O78KBa43kOg@mail.gmail.com>
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On Wed, May 20, 2026 at 12:26:13PM -0700, Ian Rogers wrote:
> On Wed, May 20, 2026 at 12:15 PM Michael Jeanson <mjeanson@efficios.com> wrote:
> >
> > The 1.x branch of Babeltrace has been superseded by 2.x in 2020 and has
> > been unmaintained since 2022, efforts have started to remove it from
> > popular distributions.
> >
> > Babeltrace 2.x offers a very similar 'ctf-writer' library that can be used
> > with minimal changes for the '--to-ctf' feature and has been packaged
> > since Debian 11 and Fedora 32.
> >
> > This patch replaces the 'libbabeltrace' build feature with
> > 'babeltrace2-ctf-writer' using pkgconfig detection, adjusts the naming of
> > the public headers and applies minor API cleanups.
> >
> > There is no changes to the output ctf traces, the ctf-writer API still
> > implements version 1.8 of the CTF specification that can be read by
> > either Babeltrace 1 / 2 or any CTF compliant reader.
> >
> > Also remove some ifdefs in the cli option parsing to allow printing the
> > helpful error message with '--to-ctf' when built without babeltrace2.
> >
> > Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
> > Cc: Adrian Hunter <adrian.hunter@intel.com>
> > Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> > Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
> > Cc: Derek Foreman <derek.foreman@collabora.com>
> > Cc: Ian Rogers <irogers@google.com>
> > Cc: Ingo Molnar <mingo@redhat.com>
> > Cc: James Clark <james.clark@linaro.org>
> > Cc: Jiri Olsa <jolsa@kernel.org>
> > Cc: Mark Rutland <mark.rutland@arm.com>
> > Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
> > Cc: Namhyung Kim <namhyung@kernel.org>
> > Cc: Peter Zijlstra <peterz@infradead.org>
> 
> Reviewed-by: Ian Rogers <irogers@google.com>

Its not applying to perf-tools-next, Michael, can you please take a
look?

Thanks,

- Arnaldo