From 30dc29e17fb7ad16ecf204c506312e9b01f40f08 Mon Sep 17 00:00:00 2001
From: fztcjjl <fztcjjl@gmail.com>
Date: Thu, 7 May 2020 17:45:48 +0800
Subject: [PATCH] fix ring buffer (#1606)

---
 util/ring/buffer.go | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/util/ring/buffer.go b/util/ring/buffer.go
index e49f1312..45a7690a 100644
--- a/util/ring/buffer.go
+++ b/util/ring/buffer.go
@@ -67,17 +67,12 @@ func (b *Buffer) Get(n int) []*Entry {
 	defer b.RUnlock()
 
 	// reset any invalid values
-	if n > b.size || n < 0 {
-		n = b.size
+	if n > len(b.vals) || n < 0 {
+		n = len(b.vals)
 	}
 
 	// create a delta
-	delta := b.size - n
-
-	// if all the values are less than delta
-	if len(b.vals) < delta {
-		return b.vals
-	}
+	delta := len(b.vals) - n
 
 	// return the delta set
 	return b.vals[delta:]