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-rw-r--r--docs/tracing.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/tracing.txt b/docs/tracing.txt
index 41eb8e6fec..455da37969 100644
--- a/docs/tracing.txt
+++ b/docs/tracing.txt
@@ -138,6 +138,10 @@ This functionality is also provided through monitor commands:
* trace-event NAME on|off
Enable/disable a given trace event.
+The "-trace events=<file>" command line argument can be used to enable the
+events listed in <file> from the very beginning of the program. This file must
+contain one event name per line.
+
== Trace backends ==
The "tracetool" script automates tedious trace event code generation and also