From: dongdong tao <tdd21151186@gmail.com>
Date: Sun, 10 Jun 2018 23:09:35 +0000 (+0800)
Subject: osdc: optimize the code doing the BufferHead mapping
X-Git-Tag: v14.0.1~1075^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=5a92c70a471489d9a0265d9c832a4d1a496c99a2;p=ceph.git

osdc: optimize the code doing the BufferHead mapping

get rid of the "newbl"
Signed-off-by: dongdong tao <tdd21151186@gmail.com>
---

diff --git a/src/osdc/ObjectCacher.cc b/src/osdc/ObjectCacher.cc
index 50f9a8d6a6c07..8d524ca089879 100644
--- a/src/osdc/ObjectCacher.cc
+++ b/src/osdc/ObjectCacher.cc
@@ -1733,15 +1733,13 @@ int ObjectCacher::writex(OSDWrite *wr, ObjectSet *oset, Context *onfreespace,
 
       // get the frag we're mapping in
       bufferlist frag;
-      frag.substr_of(wr->bl,
-		     f_it->first, f_it->second);
+      frag.substr_of(wr->bl, f_it->first, f_it->second);
 
       // keep anything left of bhoff
-      bufferlist newbl;
-      if (bhoff)
-	newbl.substr_of(bh->bl, 0, bhoff);
-      newbl.claim_append(frag);
-      bh->bl.swap(newbl);
+      if (!bhoff)
+        bh->bl.swap(frag);
+      else
+        bh->bl.claim_append(frag);
 
       opos += f_it->second;
     }