From 60b93a71d12ca775e31df05d6ecf22f2e8cbbcea Mon Sep 17 00:00:00 2001
From: "Yan, Zheng" <zheng.z.yan@intel.com>
Date: Tue, 2 Oct 2012 16:55:50 +0800
Subject: [PATCH] mds: Trim non auth subtree directory

Trim non auth subtree directory if all its dentries were trimmed
and it's not bound of auth subtree.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
---
 src/mds/MDCache.cc | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index 1348b3e1f42d..6894a9d5ef69 100644
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -5412,6 +5412,17 @@ bool MDCache::trim(int max)
       ++i)
     lru.lru_insert_mid(*i);
 
+  // trim non-auth, non-bound subtrees
+  for (map<CDir*, set<CDir*> >::iterator p = subtrees.begin();
+       p != subtrees.end();) {
+    CDir *dir = p->first;
+    p++;
+    if (!dir->is_auth() && !dir->get_inode()->is_auth()) {
+      if (dir->get_num_ref() == 1)  // subtree pin
+	trim_dirfrag(dir, 0, expiremap);
+    }
+  }
+
   // trim root?
   if (max == 0 && root) {
     list<CDir*> ls;
-- 
2.47.3