mds: don't trim non-auth root inode/dirfrag

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>

diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index f972f44e6e3fae886f2edb1de87feeb842e5c7d1..bffc7cc4a0d19dcfab0b8fb5572d099f25cbaaed 100644 (file)
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -6799,7 +6799,7 @@ void MDCache::try_trim_non_auth_subtree(CDir *dir)
     while (true) {
       CInode *diri = dir->get_inode();
       if (diri->is_base()) {
-       if (diri->authority().first != mds->whoami) {
+       if (!diri->is_root() && diri->authority().first != mds->whoami) {
          dout(10) << " closing empty non-auth subtree " << *dir << dendl;
          remove_subtree(dir);
          dir->mark_clean();