From fcb7e86101c6d85d7d6bfebde2edeb6cc4e7d9f6 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@inktank.com>
Date: Fri, 23 Aug 2013 22:20:55 -0700
Subject: limit how long flusher holds the lock

---
 src/osdc/ObjectCacher.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/osdc/ObjectCacher.cc b/src/osdc/ObjectCacher.cc
index 51fad699555..2d721e75887 100644
--- a/src/osdc/ObjectCacher.cc
+++ b/src/osdc/ObjectCacher.cc
@@ -1429,8 +1429,10 @@ void ObjectCacher::flusher_entry()
       utime_t cutoff = ceph_clock_now(cct);
       cutoff -= max_dirty_age;
       BufferHead *bh = 0;
+      int max = 20;
       while ((bh = static_cast<BufferHead*>(bh_lru_dirty.lru_get_next_expire())) != 0 &&
-	     bh->last_write < cutoff) {
+	     bh->last_write < cutoff &&
+	     --max > 0) {
 	ldout(cct, 10) << "flusher flushing aged dirty bh " << *bh << dendl;
 	bh_write(bh);
       }
-- 
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