linux-kernel - Re: [for-next][PATCH 04/21] ftrace: Optimize function graph to be called directly

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Message-ID: <20140710140125.0f585a84@gandalf.local.home>
Date:	Thu, 10 Jul 2014 14:01:25 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Tuomas Tynkkynen <ttynkkynen@...dia.com>
Cc:	<linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [for-next][PATCH 04/21] ftrace: Optimize function graph to be
 called directly

On Thu, 10 Jul 2014 20:45:57 +0300
Tuomas Tynkkynen <ttynkkynen@...dia.com> wrote:


> This commit (79922b8) breaks the function graph tracer on today's -next. 
> This is on an ARM Tegra board.
> 
> I'm using ftrace with this script:
> 
> #!/bin/sh
> echo function_graph > /d/tracing/current_tracer
> echo clear > /d/tracing/trace
> echo $$ > /d/tracing/set_ftrace_pid
> exec "$@"
> 
> ...and a simple './trace.sh ls' crashes with no console output. SysRq is 
> not responsive either.

Thanks for the report. I'll boot up one of my arm boards and see if I
can reproduce it. I'll try to get to it either this week or next.

-- Steve

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