PEP 556: Mark deferred (#942)

pep-0556.rst

@@ -1,14 +1,27 @@
 PEP: 556
 Title: Threaded garbage collection
 Author: Antoine Pitrou <solipsis@pitrou.net>
-Status: Draft
+Status: Deferred
 Type: Standards Track
 Content-Type: text/x-rst
 Created: 2017-09-08
 Python-Version: 3.7
 Post-History: 2017-09-08
 
 
+Deferral Notice
+===============
+
+This PEP is currently not being actively worked on.  It may be revived
+in the future.  The main missing steps are:
+
+* polish the implementation, adapting the test suite where necessary;
+
+* ensure setting threaded garbage collection does not disrupt existing
+  code in unexpected ways (expected impact includes lengthening the
+  lifetime of objects in reference cycles).
+
+
 Abstract
 ========
 
@@ -138,6 +151,8 @@ not a problem.
 Internal details
 ================
 
+TODO: Update this section to conform to the current implementation.
+
 ``gc`` module
 -------------