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From: Namhyung Kim <namhyung@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, 
 Arnaldo Carvalho de Melo <acme@kernel.org>, 
 Mark Rutland <mark.rutland@arm.com>, 
 Alexander Shishkin <alexander.shishkin@linux.intel.com>, 
 Jiri Olsa <jolsa@kernel.org>, Adrian Hunter <adrian.hunter@intel.com>, 
 Kan Liang <kan.liang@linux.intel.com>, linux-perf-users@vger.kernel.org, 
 linux-kernel@vger.kernel.org, Ian Rogers <irogers@google.com>
In-Reply-To: <20241028193619.247727-1-irogers@google.com>
References: <20241028193619.247727-1-irogers@google.com>
Subject: Re: [PATCH v2] perf build: Make libunwind opt-in rather than
 opt-out
Message-Id: <173082489932.149345.16688202672767622276.b4-ty@kernel.org>
Date: Tue, 05 Nov 2024 08:41:39 -0800
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On Mon, 28 Oct 2024 12:36:19 -0700, Ian Rogers wrote:

> Having multiple unwinding libraries makes the perf code harder to
> understand and we have unused/untested code paths.
> 
> Perf made BPF support an opt-out rather than opt-in feature. As libbpf
> has a libelf dependency, elfutils that provides libelf will also
> provide libdw. When libdw is present perf will use libdw unwinding
> rather than libunwind unwinding even if libunwind support is compiled
> in.
> 
> [...]

Applied to perf-tools-next, thanks!

Best regards,
Namhyung