linux-kernel - Re: [PATCH v2 05/32] selftests/ftrace: More initialize features in initialize

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Date:   Fri, 24 Aug 2018 17:24:43 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Shuah Khan <shuah@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 05/32] selftests/ftrace: More initialize features in
 initialize_ftrace

On Fri, 17 Aug 2018 01:31:33 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> Clear pid filter, synthetic_events, snapshots,
> ftrace filter, and trace log in initialize_ftrace(),
> since those are used in test cases.
> 
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>

Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org>

-- Steve

> ---
>   Changes in v2:
>    - Add reset_ftrace_filter
> ---
>  tools/testing/selftests/ftrace/test.d/functions |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
> index e4645d5e3126..b2bfa4dd43f7 100644
> --- a/tools/testing/selftests/ftrace/test.d/functions
> +++ b/tools/testing/selftests/ftrace/test.d/functions
> @@ -89,12 +89,17 @@ initialize_ftrace() { # Reset ftrace to initial-state
>      reset_tracer
>      reset_trigger
>      reset_events_filter
> +    reset_ftrace_filter
>      disable_events
>      echo > set_event_pid	# event tracer is always on
> +    echo > set_ftrace_pid
>      [ -f set_ftrace_filter ] && echo | tee set_ftrace_*
>      [ -f set_graph_function ] && echo | tee set_graph_*
>      [ -f stack_trace_filter ] && echo > stack_trace_filter
>      [ -f kprobe_events ] && echo > kprobe_events
>      [ -f uprobe_events ] && echo > uprobe_events
> +    [ -f synthetic_events ] && echo > synthetic_events
> +    [ -f snapshot ] && echo 0 > snapshot
> +    clear_trace
>      enable_tracing
>  }