Note that on 8.0-CURRENT the ADAPTIVE_GIANT is gone.

svn path=/head/; revision=31368

en_US.ISO8859-1/books/handbook/kernelconfig/chapter.sgml

@@ -740,6 +740,15 @@ options          NFS_ROOT          # NFS usable as /, requires NFSCLIENT</progra
       sleep and wait for its next chance to run.  If you are not sure,
       leave this in.</para>
 
+    <note>
+      <para>Note that on &os; 8.0-CURRENT and later versions, all mutexes are
+	adaptive by default, unless explicitly set to non-adaptive by
+	compiling with the <literal>NO_ADAPTIVE_MUTEXES</literal> option.  As
+	a result, Giant is adaptive by default now, and the
+	<literal>ADAPTIVE_GIANT</literal> option has been removed from the
+	kernel configuration.</para>
+    </note>
+
     <indexterm>
       <primary>kernel options</primary>
       <secondary>SMP</secondary>