fcntl.2: Suggest the use of real-time signals with F_NOTIFY

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/man2/fcntl.2 b/man2/fcntl.2
index d36c428ea..d74e8a67e 100644
--- a/man2/fcntl.2
+++ b/man2/fcntl.2
@@ -1235,6 +1235,11 @@ but this can be changed using the
 .B F_SETSIG
 command to
 .BR fcntl ().
+(Note that
+.B SIGIO
+is one of the nonqueuing standard signals;
+switching to the use of a real-time signal means that
+multiple notifications can be queued to the process.)
 In the latter case, the signal handler receives a
 .I siginfo_t
 structure as its second argument (if the handler was