doc: add note for cephfs upgrade in notable changes

Signed-off-by: Venky Shankar <vshankar@redhat.com>

diff --git a/doc/releases/pacific.rst b/doc/releases/pacific.rst
index a9e9b00b8c1b16b3ec91d332ca7af9419bc78859..76684bef413da11e65171d3e6e5aa54fab1bcd10 100644 (file)
--- a/doc/releases/pacific.rst
+++ b/doc/releases/pacific.rst
@@ -27,6 +27,10 @@ Notable Changes
 * A health warning will now be reported if the ``require-osd-release`` flag is not
   set to the appropriate release after a cluster upgrade.
 
+* CephFS: Upgrading Ceph Metadata Servers when using multiple active MDSs requires
+  ensuring no pending stray entries which are directories are present for active
+  ranks except rank 0. See :ref:`upgrading_from_octopus_or_nautilus`.
+
 Changelog
 ---------
 
@@ -1294,6 +1298,8 @@ CephFS distributed file system
   API, similar to FUSE. For more information, see :ref:`ceph-dokan`.
 
 
+.. _upgrading_from_octopus_or_nautilus:
+
 Upgrading from Octopus or Nautilus
 ----------------------------------