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-rw-r--r--tools/perf/Documentation/itrace.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/Documentation/itrace.txt b/tools/perf/Documentation/itrace.txt
index e817179c5027..114d0544d7c7 100644
--- a/tools/perf/Documentation/itrace.txt
+++ b/tools/perf/Documentation/itrace.txt
@@ -47,3 +47,9 @@
--itrace=i0nss1000000
skips the first million instructions.
+
+ The 'e' option may be followed by flags which affect what errors will or
+ will not be reported. Each flag must be preceded by either '+' or '-'.
+ The flags are:
+ o overflow
+ l trace data lost