diff --git a/clang/docs/ThinLTO.rst b/clang/docs/ThinLTO.rst
--- a/clang/docs/ThinLTO.rst
+++ b/clang/docs/ThinLTO.rst
@@ -123,6 +123,11 @@
 - lld-link:
   ``/opt:lldltojobs=N``
 
+Other possible values for ``N`` are:
+- 0 : only use one hyper-thread per core on all CPU sockets (default).
+- 1 : disable multi-threading.
+- all : use all hyper-threads on all CPU sockets.
+
 Incremental
 -----------
 .. _incremental: