From: xie xingguo <xie.xingguo@zte.com.cn>
Date: Fri, 2 Feb 2018 07:24:21 +0000 (+0800)
Subject: pybind/mgr/balancer: cancel plan if distribution is already perfect
X-Git-Tag: v12.2.5~81^2~5
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=e50a50cf10dc4abd2af385840db104285dbffebc;p=ceph.git

pybind/mgr/balancer: cancel plan if distribution is already perfect

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
(cherry picked from commit 3da5257a675e966e9b5748dc35373fc078c61a87)
---

diff --git a/src/pybind/mgr/balancer/module.py b/src/pybind/mgr/balancer/module.py
index 2a14dcae7f2..bf8d1143c8e 100644
--- a/src/pybind/mgr/balancer/module.py
+++ b/src/pybind/mgr/balancer/module.py
@@ -679,6 +679,9 @@ class Module(MgrModule):
             if left <= 0:
                 break
         self.log.info('prepared %d/%d changes' % (total_did, max_iterations))
+        if total_did == 0:
+            return -errno.EALREADY, 'Unable to find further optimization,' \
+                                    'or distribution is already perfect'
         return 0, ''
 
     def do_crush_compat(self, plan):