diff --git a/doc/go1.16.html b/doc/go1.16.html
index 3592d0b66313d9..5d2930788612f0 100644
--- a/doc/go1.16.html
+++ b/doc/go1.16.html
@@ -161,6 +161,18 @@ <h2 id="runtime">Runtime</h2>
   TODO
 </p>
 
+<p><!-- CL 267100 -->
+  On Linux, the runtime now defaults to releasing memory to the
+  operating system promptly (using <code>MADV_DONTNEED</code>), rather
+  than lazily when the operating system is under memory pressure
+  (using <code>MADV_FREE</code>). This means process-level memory
+  statistics like RSS will more accurately reflect the amount of
+  physical memory being used by Go processes. Systems that are
+  currently using <code>GODEBUG=madvdontneed=1</code> to improve
+  memory monitoring behavior no longer need to set this environment
+  variable.
+</p>
+
 <h2 id="compiler">Compiler</h2>
 
 <p>