linux-kernel - Re: [GIT PULL] tracing: Syscalls trace events + perf support

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Date:	Wed, 12 Aug 2009 13:02:24 -0400
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Jiaying Zhang <jiayingz@...gle.com>,
	Martin Bligh <mbligh@...gle.com>,
	Li Zefan <lizf@...fujitsu.com>, Jason Baron <jbaron@...hat.com>
Subject: Re: [GIT PULL] tracing: Syscalls trace events + perf support



Masami Hiramatsu wrote:
> Hi Frederic and Jason,
> 
> Frederic Weisbecker wrote:
>> Frederic Weisbecker (3):
>>         tracing: Add ftrace event call parameter to its field descriptor handler
> 
>> Jason Baron (12):
>>         tracing: Add ftrace_event_call void * 'data' field
> 
> Both of you added a parameter to ftrace_event_call for passing
> sycall name (call->data) to handlers, but one passes 'ftrace_event_call *'
> and another passes 'void *'. It seems not enough unified.
> 
> And also, I'm now updating my patch for 'dynamic ftrace_event_call'
> http://lkml.org/lkml/2009/7/24/234
> which adds 'ftrace_event_call *' for all handlers.
> 
> I think passing 'ftrace_event_call *' is more generic way
> to do that. What would you think about that?

Hmm, I changed my mind that passing 'void *' is enough, since
all other fields of ftrace_event_call will be handled in
trace_events.c.

Thank you,


-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com

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