diff --git a/weed/filesys/dirty_page_interval.go b/weed/filesys/dirty_page_interval.go
index ed95783a8..162b9be64 100644
--- a/weed/filesys/dirty_page_interval.go
+++ b/weed/filesys/dirty_page_interval.go
@@ -4,8 +4,6 @@ import (
 	"bytes"
 	"io"
 	"math"
-
-	"github.com/chrislusf/seaweedfs/weed/glog"
 )
 
 type IntervalNode struct {
@@ -31,12 +29,12 @@ func (list *IntervalLinkedList) Size() int64 {
 	return list.Tail.Offset + list.Tail.Size - list.Head.Offset
 }
 func (list *IntervalLinkedList) addNodeToTail(node *IntervalNode) {
-	glog.V(4).Infof("add to tail [%d,%d) + [%d,%d) => [%d,%d)", list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, node.Offset+node.Size, list.Head.Offset, node.Offset+node.Size)
+	// glog.V(4).Infof("add to tail [%d,%d) + [%d,%d) => [%d,%d)", list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, node.Offset+node.Size, list.Head.Offset, node.Offset+node.Size)
 	list.Tail.Next = node
 	list.Tail = node
 }
 func (list *IntervalLinkedList) addNodeToHead(node *IntervalNode) {
-	glog.V(4).Infof("add to head [%d,%d) + [%d,%d) => [%d,%d)", node.Offset, node.Offset+node.Size, list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, list.Tail.Offset+list.Tail.Size)
+	// glog.V(4).Infof("add to head [%d,%d) + [%d,%d) => [%d,%d)", node.Offset, node.Offset+node.Size, list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, list.Tail.Offset+list.Tail.Size)
 	node.Next = list.Head
 	list.Head = node
 }
@@ -91,8 +89,6 @@ func subList(list *IntervalLinkedList, start, stop int64) *IntervalLinkedList {
 
 func (c *ContinuousIntervals) AddInterval(data []byte, offset int64) {
 
-	// TODO AddInterval needs to handle all possible out of order writes
-
 	interval := &IntervalNode{Data: data, Offset: offset, Size: int64(len(data))}
 
 	var newLists []*IntervalLinkedList
@@ -138,7 +134,7 @@ func (c *ContinuousIntervals) AddInterval(data []byte, offset int64) {
 	}
 
 	if prevList != nil && nextList != nil {
-		glog.V(4).Infof("connecting [%d,%d) + [%d,%d) => [%d,%d)", prevList.Head.Offset, prevList.Tail.Offset+prevList.Tail.Size, nextList.Head.Offset, nextList.Tail.Offset+nextList.Tail.Size, prevList.Head.Offset, nextList.Tail.Offset+nextList.Tail.Size)
+		// glog.V(4).Infof("connecting [%d,%d) + [%d,%d) => [%d,%d)", prevList.Head.Offset, prevList.Tail.Offset+prevList.Tail.Size, nextList.Head.Offset, nextList.Tail.Offset+nextList.Tail.Size, prevList.Head.Offset, nextList.Tail.Offset+nextList.Tail.Size)
 		prevList.Tail.Next = nextList.Head
 		prevList.Tail = nextList.Tail
 		c.removeList(nextList)