Docs: release notes for shared_memory_locking

diff --git a/doc/release-notes/release-4.sgml b/doc/release-notes/release-4.sgml
index fd3f9941b40a586a3766af1849c852be40d5610e..9a6e5715ff5d62b5cb0899e01107c2ab344d7e5e 100644 (file)
--- a/doc/release-notes/release-4.sgml
+++ b/doc/release-notes/release-4.sgml
@@ -200,6 +200,10 @@ This section gives a thorough account of those changes in three categories:
           and race conditions associated with persistent connections are very rare
           and/or only cause minor problems.
 
+       <tag>shared_memory_locking</tag>
+       <p>New directive to ensure shared memory is all available immediately
+          on startup. Protects against SIGBUS errors, but delays startup.
+
        <tag>tls_outgoing_options</tag>
        <p>New directive to define TLS security context options for outgoing
           connections. For example to HTTPS servers.