From: Ondřej Surý <ondrej@isc.org>
Date: Thu, 30 Mar 2023 08:44:21 +0000 (+0200)
Subject: Add CHANGES note for [GL #3977]
X-Git-Tag: v9.19.13~21^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ebd9188d42dc93427ec1e3ea9159077816dec986;p=thirdparty%2Fbind9.git

Add CHANGES note for [GL #3977]
---

diff --git a/CHANGES b/CHANGES
index 9fc27d98b2e..c612496020d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,13 @@
+6154.	[func]		Add spinlock implementation.  The spinlock is much
+			smaller (8 bytes) than pthread_mutex (40 bytes), so
+			it can be easily embedded into objects for more
+			fine-grained locking (per-object vs per-bucket).
+
+			On the other hand, the spinlock is unsuitable for
+			situations where the lock might be held for a long
+			time as it keeps the waiting threads in a spinning
+			busy loop. [GL #3977]
+
 6153.	[bug]		Fix the streaming protocols (TCP, TLS) shutdown
 			sequence. [GL #4011]