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-rw-r--r--kernel/tools/perf/Documentation/perf-trace.txt8
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/tools/perf/Documentation/perf-trace.txt b/kernel/tools/perf/Documentation/perf-trace.txt
index ba03fd5d1..13293de88 100644
--- a/kernel/tools/perf/Documentation/perf-trace.txt
+++ b/kernel/tools/perf/Documentation/perf-trace.txt
@@ -35,7 +35,7 @@ OPTIONS
-e::
--expr::
- List of events to show, currently only syscall names.
+ List of syscalls to show, currently only syscall names.
Prefixing with ! shows all syscalls but the ones specified. You may
need to escape it.
@@ -62,7 +62,6 @@ OPTIONS
--verbose=::
Verbosity level.
--i::
--no-inherit::
Child tasks do not inherit counters.
@@ -121,6 +120,11 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
--event::
Trace other events, see 'perf list' for a complete list.
+--proc-map-timeout::
+ When processing pre-existing threads /proc/XXX/mmap, it may take a long time,
+ because the file may be huge. A time out is needed in such cases.
+ This option sets the time out limit. The default value is 500 ms.
+
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