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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Marco Elver <elver@google.com>
Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
	Adrian Hunter <adrian.hunter@intel.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Ian Rogers <irogers@google.com>, Ingo Molnar <mingo@redhat.com>,
	Jiri Olsa <jolsa@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 0/4] perf: Make SIGTRAP and __perf_pending_irq() work on
 RT.
Message-ID: <20240311155927.sbWzLN62@linutronix.de>
References: <20240308175810.2894694-1-bigeasy@linutronix.de>
 <Ze7eKgdajyEgQcpL@elver.google.com>
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In-Reply-To: <Ze7eKgdajyEgQcpL@elver.google.com>

On 2024-03-11 11:34:18 [+0100], Marco Elver wrote:
> Unfortunately there's a bug in it somewhere. It can be reproduced with
> tools/testing/selftests/perf_events/remove_on_exec.
>=20
> (FWIW, the kselftests in that directory are more aggressive test cases
> that I never figured out how to properly port to the 'perf test'
> framework: sigtrap_threads is a more aggressive version of the 'sigtrap'
> perf test, and remove_on_exec has no perf test counterpart.)

You posted to warnings, I can only reproduce the second one. Based on the
backtrace it is obvious what happens and I dare to say that I know why=E2=
=80=A6
Let me try address them.

> Thanks,
> -- Marco

Sebastian