perf_event_open.2: Document new perf_event_paranoid default

Signed-off-by: Jann Horn <jann@thejh.net>

diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2
index 67881546edaf558b09d890a2ea9771568d944c9f..e9f0740265911970ba7b453e1e8c818be5fd38ea 100644 (file)
--- a/man2/perf_event_open.2
+++ b/man2/perf_event_open.2
@@ -2752,14 +2752,15 @@ Files in
 .TP
 .I /proc/sys/kernel/perf_event_paranoid
 
+.\" default changed in commit 0161028b7c8aebef64194d3d73e43bc3b53b5c66
 The
 .I perf_event_paranoid
 file can be set to restrict access to the performance counters.
 .RS
 .IP 2 4
-allow only user-space measurements.
+allow only user-space measurements (default since Linux 4.6).
 .IP 1
-allow both kernel and user measurements (default).
+allow both kernel and user measurements (default before Linux 4.6).
 .IP 0
 allow access to CPU-specific data but not raw tracepoint samples.
 .IP \-1