doc/rados: document section absent in release < T

Add a note to doc/rados/operations/erasure-code.rst to warn future
backporters against adding the section "Erasure Coding Optimizations" to
versions of the documentation prior to the Tentacle release.

Signed-off-by: Zac Dover <zac.dover@proton.me>

diff --git a/doc/rados/operations/erasure-code.rst b/doc/rados/operations/erasure-code.rst
index b09b828b76aa559465ee3934aca357f3a4708a86..7c48b9ebc817294e952c9be75d97f74b8d5570c1 100644 (file)
--- a/doc/rados/operations/erasure-code.rst
+++ b/doc/rados/operations/erasure-code.rst
@@ -194,6 +194,13 @@ erasure-coded pool as the ``--data-pool`` during image creation:
 For CephFS, an erasure-coded pool can be set as the default data pool during
 file system creation or via `file layouts <../../../cephfs/file-layouts>`_.
 
+.. 
+   In the Tentacle documentation, there is a section here called "Erasure
+   Coding Enhancements". This section does not exist in documentation prior to
+   the Tentacle documentation. The relevant section was introduced in commit
+   185987afff561001423196e9bc1366e4b7079c20, in
+   https://github.com/ceph/ceph/pull/64809.
+
 Erasure-coded pool overhead
 ---------------------------