From 482b6e5c345ef9195d7ff163c40b62da8dd7291d Mon Sep 17 00:00:00 2001
From: iamqizhao <toqizhao@gmail.com>
Date: Thu, 12 May 2016 19:01:25 -0700
Subject: [PATCH] more comments

---
 balancer.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/balancer.go b/balancer.go
index d5f34433..671d2b3d 100644
--- a/balancer.go
+++ b/balancer.go
@@ -41,8 +41,8 @@ func RoundRobin() Balancer {
 type roundRobin struct {
 	mu     sync.Mutex
 	addrs  []Address
-	next   int // index of the next address to return for Get()
-	waitCh chan struct{}
+	next   int           // index of the next address to return for Get()
+	waitCh chan struct{} // channel to block when there is no address available
 }
 
 // Up appends addr to the end of rr.addrs and sends notification if there