linux-kernel - Re: ftrace function_graph causes system crash

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Message-ID: <20160921141705.6ab0be03@gandalf.local.home>
Date:   Wed, 21 Sep 2016 14:17:05 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Jisheng Zhang <jszhang@...vell.com>
Cc:     "Bean Huo (beanhuo)" <beanhuo@...ron.com>,
        "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 17:13:07 +0800
Jisheng Zhang <jszhang@...vell.com> wrote:

> I'm not sure whether the commit d6df3576e6b4 ("clocksource/drivers/arm_global_timer
> : Prevent ftrace recursion") can fix this issue.
> 
> this commit is merged since v4.3, I noticed your kernel version is v4.0

BTW, yes, that would be the fix.

-- Steve

> 
> Thanks,
> Jisheng
> 
> > Do you know now how to deeply debug and trace which line is wrong through Ftrace?
> >