linux-kernel - Re: [PATCH] selftests/ftrace: mark irqsoff_tracer.tc test as unresolved if the test module does not exist

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Date:   Thu, 7 May 2020 17:50:49 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Po-Hsu Lin <po-hsu.lin@...onical.com>
Cc:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        shuah@...nel.org, mingo@...hat.com, rostedt@...dmis.org,
        mhiramat@...nel.org, joel@...lfernandes.org
Subject: Re: [PATCH] selftests/ftrace: mark irqsoff_tracer.tc test as
 unresolved if the test module does not exist

On Tue,  5 May 2020 18:14:45 +0800
Po-Hsu Lin <po-hsu.lin@...onical.com> wrote:

> The UNRESOLVED state is much more apporiate than the UNSUPPORTED state
> for the absence of the test module, as it matches "test was set up
> incorrectly" situation in the README file.
> 
> A possible scenario is that the function was enabled (supported by the
> kernel) but the module was not installed properly, in this case we
> cannot call this as UNSUPPORTED.
> 
> This change also make it consistent with other module-related tests
> in ftrace.
> 
> Signed-off-by: Po-Hsu Lin <po-hsu.lin@...onical.com>

Looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@...nel.org>

Thanks!

> ---
>  .../testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc b/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
> index cbd1743..2b82c80e 100644
> --- a/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
> +++ b/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
> @@ -17,7 +17,14 @@ unsup() { #msg
>      exit_unsupported
>  }
>  
> -modprobe $MOD || unsup "$MOD module not available"
> +unres() { #msg
> +    reset_tracer
> +    rmmod $MOD || true
> +    echo $1
> +    exit_unresolved
> +}
> +
> +modprobe $MOD || unres "$MOD module not available"
>  rmmod $MOD
>  
>  grep -q "preemptoff" available_tracers || unsup "preemptoff tracer not enabled"
> -- 
> 2.7.4


-- 
Masami Hiramatsu <mhiramat@...nel.org>