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-rw-r--r--tools/perf/Documentation/perf.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf.txt b/tools/perf/Documentation/perf.txt
index ba3df49c16..a7cf7bc2f9 100644
--- a/tools/perf/Documentation/perf.txt
+++ b/tools/perf/Documentation/perf.txt
@@ -64,6 +64,9 @@ OPTIONS
perf-event-open - Print perf_event_open() arguments and
return value
+--debug-file::
+ Write debug output to a specified file.
+
DESCRIPTION
-----------
Performance counters for Linux are a new kernel-based subsystem