linux-kernel - Re: [HELP] How to use ftrace to learn how a function is ivoked?

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Message-ID: <533D07BE.8070202@linux.intel.com>
Date:	Thu, 03 Apr 2014 15:03:26 +0800
From:	"Li, Aubrey" <aubrey.li@...ux.intel.com>
To:	"Du, ChangbinX" <changbinx.du@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [HELP] How to use ftrace to learn how a function is ivoked?

On 2014/4/3 14:36, Du, ChangbinX wrote:
> Hi, All,
> I have a question for ftrace usage. It is that if I have a function A, then I want to 
> know how function A is ivoked?
> I know ftrace can show me what sub-functions that A called by below steps:
> 	# echo function_graph > current_tracer
> 　　# echo function_A > set_graph_function
> 	# cat trace
> Then a call stack will show what functions A has called. But sometimes I want to 
> know how A is called. Is there a method to do this? Please help me!

dump_stack(), kprobe, AFAIK.

Thanks,
-Aubrey
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