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[188.155.168.84]) by smtp.gmail.com with ESMTPSA id er9sm10310087edb.77.2022.02.14.00.37.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Feb 2022 00:37:36 -0800 (PST) From: Krzysztof Kozlowski To: Steven Rostedt , Ingo Molnar , Shuah Khan , Krzysztof Kozlowski , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, joseph.salisbury@canonical.com Cc: Sebastian Andrzej Siewior , Shuah Khan Subject: [PATCH v3] selftests/ftrace: Do not trace do_softirq because of PREEMPT_RT Date: Mon, 14 Feb 2022 09:36:57 +0100 Message-Id: <20220214083657.165921-1-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The PREEMPT_RT patchset does not use do_softirq() function thus trying to filter for do_softirq fails for such kernel: echo do_softirq ftracetest: 81: echo: echo: I/O error Choose some other visible function for the test. The function does not have to be actually executed during the test, because it is only testing filter API interface. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Shuah Khan Reviewed-by: Steven Rostedt (VMware) Acked-by: Sebastian Andrzej Siewior Reviewed-by: Steven Rostedt (Google) --- Changes since v2: 1. Rephrase commit msg, after comments from Sebastian. 2. Add review tag. Changes since v1: 1. Use scheduler_tick. 2. Add review tag. Notes: I understand that the failure does not exist on mainline kernel (only with PREEMPT_RT patchset) but the change does not harm it. If it is not suitable alone, please consider it for RT patchset. --- .../selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_f= ile.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.= tc index e96e279e0533..25432b8cd5bd 100644 --- a/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc @@ -19,7 +19,7 @@ fail() { # mesg =20 FILTER=3Dset_ftrace_filter FUNC1=3D"schedule" -FUNC2=3D"do_softirq" +FUNC2=3D"scheduler_tick" =20 ALL_FUNCS=3D"#### all functions enabled ####" =20 --=20 2.32.0