linux-kernel - Re: ftrace function_graph causes system crash

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Message-ID: <20160921094529.6802e97e@gandalf.local.home>
Date:   Wed, 21 Sep 2016 09:45:29 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "Bean Huo (beanhuo)" <beanhuo@...ron.com>
Cc:     "Zoltan Szubbocsev (zszubbocsev)" <zszubbocsev@...ron.com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        "rfi@...ts.rocketboards.org" <rfi@...ts.rocketboards.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: ftrace function_graph causes system crash

On Wed, 21 Sep 2016 07:50:58 +0000
"Bean Huo (beanhuo)" <beanhuo@...ron.com> wrote:
 
> 
> Hi, Steve
> Thanks very much! This is a very useful trace tool, I now know the problem function,
> It is gt_counter_read, if not trace this function, ftrace function_graph work well.
> Do you know now how to deeply debug and trace which line is wrong through Ftrace?

Hmm, maybe I should add this into the scripts directory. Yeah, I should
do that.

-- Steve