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-rw-r--r--Documentation/trace/ftrace.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt
index db18362c14f3..f52f297cb406 100644
--- a/Documentation/trace/ftrace.txt
+++ b/Documentation/trace/ftrace.txt
@@ -204,6 +204,12 @@ of ftrace. Here is a list of some of the key files:
Have the function tracer only trace a single thread.
+ set_event_pid:
+
+ Have the events only trace a task with a PID listed in this file.
+ Note, sched_switch and sched_wake_up will also trace events
+ listed in this file.
+
set_graph_function:
Set a "trigger" function where tracing should start