Don't take treeLock for forgetUpdate() in postLookup().

fuse/fsconnector.go

@@ -117,6 +117,10 @@ func (me *FileSystemConnector) lookupUpdate(node *Inode) {
 	node.lookupCount += 1
 }
 
+
+// Must run outside treeLock.
+//
+// TODO - reconcile api for lookupUpdate() and forgetUpdate().
 func (me *FileSystemConnector) forgetUpdate(node *Inode, forgetCount int) {
 	defer me.verify()
 

fuse/fsops.go

@@ -87,8 +87,6 @@ func (me *FileSystemConnector) postLookup(fi *os.FileInfo, fsNode FsNode, code S
 
 	if !code.Ok() {
 		if attrNode != nil {
-			mount.treeLock.Lock()
-			defer mount.treeLock.Unlock()
 			me.forgetUpdate(attrNode, 1)
 		}