From: Jianpeng Ma <jianpeng.ma@intel.com>
Date: Tue, 23 Dec 2014 03:02:33 +0000 (+0800)
Subject: WBThrottle: call signal only beyond limit when queue entry.
X-Git-Tag: v9.0.2~94^2~2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=6b054fcc99c4befa87e988c7fe6d3d1a47d1e2ab;p=ceph.git

WBThrottle: call signal only beyond limit when queue entry.

Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>
---

diff --git a/src/os/WBThrottle.cc b/src/os/WBThrottle.cc
index db0636dd401c..7bf5fcc87cb2 100644
--- a/src/os/WBThrottle.cc
+++ b/src/os/WBThrottle.cc
@@ -212,7 +212,10 @@ void WBThrottle::queue_wb(
 
   wbiter->second.first.add(nocache, len, 1);
   insert_object(hoid);
-  cond.Signal();
+  if (!(cur_ios < io_limits.first &&
+      pending_wbs.size() < fd_limits.first &&
+      cur_size < size_limits.first))
+    cond.Signal();
 }
 
 void WBThrottle::clear()