1 files changed, 17 insertions, 0 deletions

diff --git a/sys/conf/NOTES b/sys/conf/NOTES
index 4b049732dcfa..2968618999d2 100644
--- a/sys/conf/NOTES
+++ b/sys/conf/NOTES
@@ -132,6 +132,23 @@ options 	ROOTDEVNAME=\"ufs:da0s2e\"
 
 
 #####################################################################
+# Scheduler options:
+#
+# Specifying one of SCHED_4BSD or SCHED_ULE is manditory.  These options
+# select which scheduler is compiled in.
+#
+# SCHED_4BSD is the historical, proven, BSD scheduler.  It has a global run
+# queue and no cpu affinity which makes it suboptimal for SMP.  It has very
+# good interactivity and priority selection.
+#
+# SCHED_ULE is a new experimental scheduler that has been designed for SMP
+# although it will work just fine on UP.  Users of this scheduler should
+# expect some hicups and be prepaired to provide feedback.
+#
+options		SCHED_4BSD
+#options	SCHED_ULE
+
+#####################################################################
 # SMP OPTIONS:
 #
 # SMP enables building of a Symmetric MultiProcessor Kernel.