[QUESTION] trace_function_graph: consumed event may be invalid

[Lai Jiangshan]

In get_return_for_leaf() {
	......
	ring_buffer_consume()
	......
	access to @curr->ent.pid
}

@curr is saved at consumed event, if this event is the last event
in the page, the ring_buffer may reuse the page. It will become invalid.

Is there any other code to ensure it valid when we `cat trace_pipe`?

Lai.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/