diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC
--- a/sys/amd64/conf/GENERIC
+++ b/sys/amd64/conf/GENERIC
@@ -16,6 +16,14 @@
 # If you are in doubt as to the purpose or necessity of a line, check first
 # in NOTES.
 #
+# WARNING: GENERIC is, probably by far, the most tested kernel configuration.
+# Although good programming and design considerably limit unexpected
+# cross-impacts of activating/deactivating some options, please be aware that
+# there is no guarantee that such problems don't exist.  As you tweak your
+# kernel configuration, you are encouraged to specifically test your resulting
+# system with respect to your intended workloads.  Be prepared to have to fix
+# the occasional compile error and/or be taught to revert to a GENERIC kernel to
+# reproduce the issues you might encounter.
 
 cpu		HAMMER
 ident		GENERIC