linux-kernel - Re: [PATCH] tracing: create events only when configed

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Date:	Sun, 24 May 2009 23:05:44 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tracing: create events only when configed

On Fri, May 22, 2009 at 05:40:23PM +0800, Lai Jiangshan wrote:
> 
> There some unneeded events in debugfs/tracing/ftrace/ when the
> corresponding CONFIG_XXXX=n.
> 
> And when CONFIG_ENABLE_EVENT_TRACING=n, various events
> are still created.
> 
> Now when CONFIG_ENABLE_EVENT_TRACING=n, various events are
> not created, trace_export.c is compiled only for creating
> TRACEPOINTs.
> 
> [Impact:] cleanup
> 
> Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>


Looks good.

Acked-by: Frederic Weisbecker <fweisbec@...il.com>


> ---
> diff --git a/include/trace/define_trace.h b/include/trace/define_trace.h
> index f7a7ae1..e4e0e7a 100644
> --- a/include/trace/define_trace.h
> +++ b/include/trace/define_trace.h
> @@ -52,7 +52,7 @@
>  
>  #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
>  
> -#ifdef CONFIG_EVENT_TRACING
> +#ifdef CONFIG_ENABLE_EVENT_TRACING
>  #include <trace/ftrace.h>
>  #endif
>  
> diff --git a/kernel/trace/trace_event_types.h b/kernel/trace/trace_event_types.h
> index 5e32e37..5c9813e 100644
> --- a/kernel/trace/trace_event_types.h
> +++ b/kernel/trace/trace_event_types.h
> @@ -13,6 +13,7 @@ TRACE_EVENT_FORMAT(function, TRACE_FN, ftrace_entry, ignore,
>  	TP_RAW_FMT(" %lx <-- %lx")
>  );
>  
> +#ifdef CONFIG_FUNCTION_GRAPH_TRACER
>  TRACE_EVENT_FORMAT(funcgraph_entry, TRACE_GRAPH_ENT,
>  		   ftrace_graph_ent_entry, ignore,
>  	TRACE_STRUCT(
> @@ -30,6 +31,7 @@ TRACE_EVENT_FORMAT(funcgraph_exit, TRACE_GRAPH_RET,
>  	),
>  	TP_RAW_FMT("<-- %lx (%d)")
>  );
> +#endif
>  
>  TRACE_EVENT_FORMAT(wakeup, TRACE_WAKE, ctx_switch_entry, ignore,
>  	TRACE_STRUCT(
> @@ -66,6 +68,7 @@ TRACE_EVENT_FORMAT_NOFILTER(special, TRACE_SPECIAL, special_entry, ignore,
>  	TP_RAW_FMT("(%08lx) (%08lx) (%08lx)")
>  );
>  
> +#ifdef CONFIG_STACKTRACE
>  /*
>   * Stack-trace entry:
>   */
> @@ -101,6 +104,7 @@ TRACE_EVENT_FORMAT(user_stack, TRACE_USER_STACK, userstack_entry, ignore,
>  	TP_RAW_FMT("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n"
>  		 "\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n")
>  );
> +#endif
>  
>  TRACE_EVENT_FORMAT(bprint, TRACE_BPRINT, bprint_entry, ignore,
>  	TRACE_STRUCT(
> @@ -119,6 +123,7 @@ TRACE_EVENT_FORMAT(print, TRACE_PRINT, print_entry, ignore,
>  	TP_RAW_FMT("%08lx (%d) fmt:%p %s")
>  );
>  
> +#ifdef CONFIG_BRANCH_TRACER
>  TRACE_EVENT_FORMAT(branch, TRACE_BRANCH, trace_branch, ignore,
>  	TRACE_STRUCT(
>  		TRACE_FIELD(unsigned int, line, line)
> @@ -130,7 +135,9 @@ TRACE_EVENT_FORMAT(branch, TRACE_BRANCH, trace_branch, ignore,
>  	),
>  	TP_RAW_FMT("%u:%s:%s (%u)")
>  );
> +#endif
>  
> +#ifdef CONFIG_HW_BRANCH_TRACER
>  TRACE_EVENT_FORMAT(hw_branch, TRACE_HW_BRANCHES, hw_branch_entry, ignore,
>  	TRACE_STRUCT(
>  		TRACE_FIELD(u64, from, from)
> @@ -138,7 +145,9 @@ TRACE_EVENT_FORMAT(hw_branch, TRACE_HW_BRANCHES, hw_branch_entry, ignore,
>  	),
>  	TP_RAW_FMT("from: %llx to: %llx")
>  );
> +#endif
>  
> +#ifdef CONFIG_POWER_TRACER
>  TRACE_EVENT_FORMAT(power, TRACE_POWER, trace_power, ignore,
>  	TRACE_STRUCT(
>  		TRACE_FIELD_SIGN(ktime_t, state_data.stamp, stamp, 1)
> @@ -148,7 +157,9 @@ TRACE_EVENT_FORMAT(power, TRACE_POWER, trace_power, ignore,
>  	),
>  	TP_RAW_FMT("%llx->%llx type:%u state:%u")
>  );
> +#endif
>  
> +#ifdef CONFIG_KMEMTRACE
>  TRACE_EVENT_FORMAT(kmem_alloc, TRACE_KMEM_ALLOC, kmemtrace_alloc_entry, ignore,
>  	TRACE_STRUCT(
>  		TRACE_FIELD(enum kmemtrace_type_id, type_id, type_id)
> @@ -171,5 +182,6 @@ TRACE_EVENT_FORMAT(kmem_free, TRACE_KMEM_FREE, kmemtrace_free_entry, ignore,
>  	),
>  	TP_RAW_FMT("type:%u call_site:%lx ptr:%p")
>  );
> +#endif
>  
>  #undef TRACE_SYSTEM
> 
> 
> 
> 
> 
> 

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