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    SubjectRe: 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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