2008/10/28 Steven Rostedt <rostedt@goodmis.org>:
quoted text
>
> 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

Sorry I sent a config for the mainline.
This new one is the right.