perf tools: Fix usage of max_stack sysctl

[linux-2.6-block.git] / tools / perf / Documentation / perf-script.txt

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 382ddfb45d1dbbb4a65bfe464c29096923b64bd3..4fc44c75263fdb803315394e8353d77063f69e6a 100644 (file)
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -259,9 +259,23 @@ include::itrace.txt[]
 --full-source-path::
        Show the full path for source files for srcline output.
 
+--max-stack::
+        Set the stack depth limit when parsing the callchain, anything
+        beyond the specified depth will be ignored. This is a trade-off
+        between information loss and faster processing especially for
+        workloads that can have a very long callchain stack.
+        Note that when using the --itrace option the synthesized callchain size
+        will override this value if the synthesized callchain size is bigger.
+
+        Default: 127
+
 --ns::
        Use 9 decimal places when displaying time (i.e. show the nanoseconds)
 
+-f::
+--force::
+       Don't do ownership validation.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-script-perl[1],