Steve: I guess you are asking that the operation that does the "trace_on" also writes to the trace buffer saying that it did so? Yuyang: To be specific, not saying the tracing start, but saying "just trace it, even we didn't hit the trace point". ? -- To unsubscribe from this list: send the line "unsubscribe linux-trace-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html