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diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst
index 7c5e6d6ab5d1..c3b9bd2fd512 100644
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+++ b/Documentation/trace/ftrace.rst
@@ -1404,6 +1404,7 @@ trace has provided some very helpful debugging information.
If we prefer function graph output instead of function, we can set
display-graph option::
+
with echo 1 > options/display-graph
# tracer: irqsoff