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-rw-r--r--tools/perf/Documentation/perf-lock.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt
index 0f9f720e599d..11b8901d8d13 100644
--- a/tools/perf/Documentation/perf-lock.txt
+++ b/tools/perf/Documentation/perf-lock.txt
@@ -187,6 +187,12 @@ CONTENTION OPTIONS
--lock-filter=<value>::
Show lock contention only for given lock addresses or names (comma separated list).
+-S::
+--callstack-filter=<value>::
+ Show lock contention only if the callstack contains the given string.
+ Note that it matches the substring so 'rq' would match both 'raw_spin_rq_lock'
+ and 'irq_enter_rcu'.
+
SEE ALSO
--------