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bh=SzoK0Fw3umtF2LI2/KfCcWVLApBj6ZybhrvyoFVg85U=; b=kEIbJrkA4wW+QV7jKi44QsxBEyvS69z5PNbN23yP6TIApcmpoYG9VcEAw4poCS+02pemoW N89T/yyh6pNDfxCA== From: Sebastian Andrzej Siewior To: Arnaldo Carvalho de Melo Cc: Mike Galbraith , Peter Zijlstra , Marco Elver , linux-rt-users@vger.kernel.org, Linux Kernel Mailing List , Juri Lelli , Clark Williams , Alessandro Carminati , Thomas Gleixner , Artem Savkov Subject: Re: 'perf test sigtrap' failing on PREEMPT_RT_FULL Message-ID: <20240306165443.5AKJ403t@linutronix.de> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: On 2024-03-06 13:27:06 [-0300], Arnaldo Carvalho de Melo wrote: > That its what introduces perf_pending_task(), I'm now unsure we can just > disable migration, as event_sched_out() seems to require being called > under a raw_spin_lock and that disables preemption... Not sure what the best course of action is here but based on what I learned last time you reported this I think we need delayed signals=E2=80=A6 Let me look into this. We had it and then removed it because we had no users of it at some point but probably nobody took perf into account. > - Arnaldo Sebastian