linux-kernel - Re: [PATCH 2/3] tracing: Convert some signal events to DEFINE

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Date:	Tue, 23 Mar 2010 23:07:50 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Masami Hiramatsu <mhiramat@...hat.com>
Subject: Re: [PATCH 2/3] tracing: Convert some signal events to DEFINE_TRACE

On Wed, 2010-03-24 at 10:58 +0800, Li Zefan wrote:
> Use DECLARE_EVENT_CLASS to remove duplicate code:
> 
> text    data     bss     dec     hex filename
>   23639    6084       8   29731    7423 kernel/signal.o.orig
>   22727    6084       8   28819    7093 kernel/signal.o
> 
> 2 events are converted:
> 
>   signal_queue_overflow: signal_overflow_fail, signal_lose_info
> 

Masami,

Can I get your Acked-by for this.

Thanks,

-- Steve

> No functional change.
> 
> Signed-off-by: Li Zefan <lizf@...fujitsu.com>
> ---
>  include/trace/events/signal.h |   52 +++++++++++++++++-----------------------
>  1 files changed, 22 insertions(+), 30 deletions(-)
> 
> diff --git a/include/trace/events/signal.h b/include/trace/events/signal.h
> index a510b75..814566c 100644
> --- a/include/trace/events/signal.h
> +++ b/include/trace/events/signal.h
> @@ -100,18 +100,7 @@ TRACE_EVENT(signal_deliver,
>  		  __entry->sa_handler, __entry->sa_flags)
>  );
>  
> -/**
> - * signal_overflow_fail - called when signal queue is overflow
> - * @sig: signal number
> - * @group: signal to process group or not (bool)
> - * @info: pointer to struct siginfo
> - *
> - * Kernel fails to generate 'sig' signal with 'info' siginfo, because
> - * siginfo queue is overflow, and the signal is dropped.
> - * 'group' is not 0 if the signal will be sent to a process group.
> - * 'sig' is always one of RT signals.
> - */
> -TRACE_EVENT(signal_overflow_fail,
> +DECLARE_EVENT_CLASS(signal_queue_overflow,
>  
>  	TP_PROTO(int sig, int group, struct siginfo *info),
>  
> @@ -135,6 +124,24 @@ TRACE_EVENT(signal_overflow_fail,
>  );
>  
>  /**
> + * signal_overflow_fail - called when signal queue is overflow
> + * @sig: signal number
> + * @group: signal to process group or not (bool)
> + * @info: pointer to struct siginfo
> + *
> + * Kernel fails to generate 'sig' signal with 'info' siginfo, because
> + * siginfo queue is overflow, and the signal is dropped.
> + * 'group' is not 0 if the signal will be sent to a process group.
> + * 'sig' is always one of RT signals.
> + */
> +DEFINE_EVENT(signal_queue_overflow, signal_overflow_fail,
> +
> +	TP_PROTO(int sig, int group, struct siginfo *info),
> +
> +	TP_ARGS(sig, group, info)
> +);
> +
> +/**
>   * signal_lose_info - called when siginfo is lost
>   * @sig: signal number
>   * @group: signal to process group or not (bool)
> @@ -145,28 +152,13 @@ TRACE_EVENT(signal_overflow_fail,
>   * 'group' is not 0 if the signal will be sent to a process group.
>   * 'sig' is always one of non-RT signals.
>   */
> -TRACE_EVENT(signal_lose_info,
> +DEFINE_EVENT(signal_queue_overflow, signal_lose_info,
>  
>  	TP_PROTO(int sig, int group, struct siginfo *info),
>  
> -	TP_ARGS(sig, group, info),
> -
> -	TP_STRUCT__entry(
> -		__field(	int,	sig	)
> -		__field(	int,	group	)
> -		__field(	int,	errno	)
> -		__field(	int,	code	)
> -	),
> -
> -	TP_fast_assign(
> -		__entry->sig	= sig;
> -		__entry->group	= group;
> -		TP_STORE_SIGINFO(__entry, info);
> -	),
> -
> -	TP_printk("sig=%d group=%d errno=%d code=%d",
> -		  __entry->sig, __entry->group, __entry->errno, __entry->code)
> +	TP_ARGS(sig, group, info)
>  );
> +
>  #endif /* _TRACE_SIGNAL_H */
>  
>  /* This part must be outside protection */


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