Fix comments about node health monitor

Signed-off-by: Guangwen Feng <[email protected]>

Author: Guangwen Feng

pkg/controller/nodelifecycle/node_lifecycle_controller.go

@@ -623,8 +623,10 @@ func (nc *Controller) doEvictionPass() {
 }
 
 // monitorNodeHealth verifies node health are constantly updated by kubelet, and
-// if not, post "NodeReady==ConditionUnknown". It also evicts all pods if node
-// is not ready or not reachable for a long period of time.
+// if not, post "NodeReady==ConditionUnknown".
+// For nodes who are not ready or not reachable for a long period of time.
+// This function will taint them if TaintBasedEvictions feature was enabled.
+// Otherwise, it would evict it directly.
 func (nc *Controller) monitorNodeHealth() error {
 	// We are listing nodes from local cache as we can tolerate some small delays
 	// comparing to state from etcd and there is eventual consistency anyway.