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    SubjectRe: Ftrace: can trace kthread?
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    On Thu, 2010-10-21 at 16:59 +0800, Figo.zhang wrote:
    > > I just
    > > echo 0 > tracing_enabled
    > > echo function > current_tracer
    > > echo 374(pid of flush) > set_ftrace_pid
    > > echo 1 > tracing_enabled
    > > wait some time
    > > echo 0 > tracing_enabled
    > > cat trace
    > >
    > > So I think this answer your question "could kthread be traced?"
    >
    > i do it the same of you.

    > but i canot trace nothing.

    Your initial attempt had:

    echo kswapd > /sys/kernel/debug/tracing/set_graph_function

    have you reset that state?


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