1 files changed, 23 insertions, 0 deletions
diff --git a/src/net/sock_linux_test.go b/src/net/sock_linux_test.go
new file mode 100644
index 0000000..11303cf
--- /dev/null
+++ b/src/net/sock_linux_test.go
@@ -0,0 +1,23 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package net
+
+import (
+	"internal/syscall/unix"
+	"testing"
+)
+
+func TestMaxAckBacklog(t *testing.T) {
+	n := 196602
+	major, minor := unix.KernelVersion()
+	backlog := maxAckBacklog(n)
+	expected := 1<<16 - 1
+	if major > 4 || (major == 4 && minor >= 1) {
+		expected = n
+	}
+	if backlog != expected {
+		t.Fatalf(`Kernel version: "%d.%d", sk_max_ack_backlog mismatch, got %d, want %d`, major, minor, backlog, expected)
+	}
+}