doc/releases/octopus.rst: add note for rbd perf image iostat/iotop

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/doc/releases/octopus.rst b/doc/releases/octopus.rst
index 0ea7149674bbcbcd904876b41f2512b5ca2ddd5e..802a6e8d300188010dff9e5573680c46c2eee950 100644 (file)
--- a/doc/releases/octopus.rst
+++ b/doc/releases/octopus.rst
@@ -25,6 +25,11 @@ Notable Changes
   without the object-unique suffix. The conversion is fixed in this release.
   Relevant tracker: https://tracker.ceph.com/issues/5614
 
+* The ability to blend all RBD pools together into a single view by invoking
+  "rbd perf image iostat" or "rbd perf image iotop" commands without any options
+  or positional arguments is resurrected.  Such invocations accidentally became
+  limited to just the default pool (``rbd_default_pool``) in v15.2.14.
+
 Changelog
 ---------------