linux-kernel - Re: [PATCH 1/2] tracing: Move enabling tracepoints to just after rcu

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Date:	Wed, 14 Jan 2015 12:23:29 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Wang Nan <wangnan0@...wei.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	mingo@...nel.org, Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	paulmck@...ux.vnet.ibm.com, mathieu.desnoyers@...icios.com,
	xiakaixu 00238161 <xiakaixu@...wei.com>
Subject: Re: [PATCH 1/2] tracing: Move enabling tracepoints to just after
 rcu_init()

On Wed, 14 Jan 2015 10:09:05 +0900
Namhyung Kim <namhyung@...nel.org> wrote:


> > >> +
> > >> +void __init trace_event_init(void)
> > >> +{
> > >> +	event_trace_memsetup();
> > >> +	init_ftrace_syscalls();
> > >> +	event_trace_enable();
> > >> +}
> > >> +
> > > 
> > > init_ftrace_syscalls() get called twice by trace_init() and trace_event_init(), some resources are wasted.
> > > At lease one of them can be removed.
> 
> I think it's more natural to keep it in the trace_event_init().

I agree, I'll remove it. I'm fixing another bug that this change caused
to system call events.

-- Steve
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