linux-kernel - Re: Ftrace doesn't work anymore on latest tip

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Message-ID: <alpine.DEB.1.10.0810271935320.20039@gandalf.stny.rr.com>
Date:	Mon, 27 Oct 2008 19:36:46 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Frédéric Weisbecker <fweisbec@...il.com>
cc:	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Ftrace doesn't work anymore on latest tip


On Tue, 28 Oct 2008, Fr?d?ric Weisbecker wrote:

> Hi,
> 
> I tried to launch the function tracer with the latest -tip.
> With DYNAMIC_FTRACE (I just tried one time), I set "function" to
> current_trace and it blocks during writing. I can't
> even switch to another console.
> Without DYNAMIC_FTRACE I can set the tracer to function but it doesn't
> produce any trace, even on trace or tracing_pipe.
> 
> My config is in attachment.
> I will try some revert...or some other tracers.
> 


You might want to update your config (make oldconfig?) The latest tip has 
FUNCTION_TRACER instead of FTRACE.

Also, the config you sent me, does not even have FTRACE on :-/

CONFIG_HAVE_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_TRACER_MAX_TRACE=y
CONFIG_RING_BUFFER=y
CONFIG_TRACING=y
# CONFIG_FTRACE is not set
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_PREEMPT_TRACER is not set
# CONFIG_SYSPROF_TRACER is not set
CONFIG_SCHED_TRACER=y
CONFIG_CONTEXT_SWITCH_TRACER=y


-- Steve

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