From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>, Shuah Khan <shuah@kernel.org>,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rt-users@vger.kernel.org, joseph.salisbury@canonical.com,
Shuah Khan <skhan@linuxfoundation.org>
Subject: Re: [PATCH v2] selftests/ftrace: Do not trace do_softirq because of PREEMPT_RT
Date: Thu, 10 Feb 2022 14:47:28 +0100 [thread overview]
Message-ID: <YgUXcGC1mH7VX1d9@linutronix.de> (raw)
In-Reply-To: <20220210083356.11212-1-krzysztof.kozlowski@canonical.com>
On 2022-02-10 09:33:56 [+0100], Krzysztof Kozlowski wrote:
> The PREEMPT_RT patchset does not use soft IRQs thus trying to filter for
> do_softirq fails for such kernel:
PREEMPT_RT does use soft IRQs.
> echo do_softirq
> ftracetest: 81: echo: echo: I/O error
>
> Choose some other visible function for the test.
>
…
> --- 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
>
> FILTER=set_ftrace_filter
> FUNC1="schedule"
> -FUNC2="do_softirq"
> +FUNC2="scheduler_tick"
What is the purpose of this?
> ALL_FUNCS="#### all functions enabled ####"
>
Sebastian
next prev parent reply other threads:[~2022-02-10 13:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-10 8:33 [PATCH v2] selftests/ftrace: Do not trace do_softirq because of PREEMPT_RT Krzysztof Kozlowski
2022-02-10 13:47 ` Sebastian Andrzej Siewior [this message]
2022-02-10 14:05 ` Krzysztof Kozlowski
2022-02-10 14:10 ` Sebastian Andrzej Siewior
2022-02-10 14:13 ` Krzysztof Kozlowski
2022-02-10 14:48 ` Sebastian Andrzej Siewior
2022-02-10 15:07 ` Steven Rostedt
2022-02-10 15:05 ` Steven Rostedt
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