include docs

Author: pacak

src/sys/socket/mod.rs

@@ -1635,6 +1635,11 @@ impl<S> MultiHeaders<S> {
 /// call to recvmmsg(). In the current implementation, however, the error code can be
 /// overwritten in the meantime by an unrelated network event on a socket, for example an
 /// incoming ICMP packet.
+
+// On aarch64 linux using recvmmsg and trying to get hardware/kernel timestamps might not
+// always produce the desired results - see https://github.com/nix-rust/nix/pull/1744 for more
+// details
+
 #[cfg(any(
     target_os = "linux",
     target_os = "android",