mds: add debugging for pre_cow_old_inode

Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
(cherry picked from commit c9d36056c7d515ad879d589938f888f9f2787973)

diff --git a/src/mds/CInode.cc b/src/mds/CInode.cc
index 6fa2c4eb82ef83545b6fa8585acbb6a7616deeaf..05066dd711973b0f538a2c025b036e820aef14c9 100644 (file)
--- a/src/mds/CInode.cc
+++ b/src/mds/CInode.cc
@@ -3034,6 +3034,7 @@ const CInode::mempool_old_inode& CInode::cow_old_inode(snapid_t follows, bool co
 void CInode::pre_cow_old_inode()
 {
   snapid_t follows = mdcache->get_global_snaprealm()->get_newest_seq();
+  dout(20) << __func__ << " follows " << follows << " on " << *this << dendl;
   if (first <= follows)
     cow_old_inode(follows, true);
 }