PendingReleaseNotes: add release note for 62338

See https://tracker.ceph.com/issues/62338 and
2fc5486e.

Signed-off-by: Samuel Just <sjust@redhat.com>
(cherry picked from commit dfb4b26a715bf2cc20e116c9bee4dad507383f3b)

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index e23c9eb08b16349774e2cb4261b8b01d720050fe..33dd1144f69acde9d9a86b2f79395d44e6436f55 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -11,6 +11,14 @@
   `pool_is_in_selfmanaged_snaps_mode`.
 * RBD: The option ``--image-id`` has been added to `rbd children` CLI command,
   so it can be run for images in the trash.
+* RADOS: For bug 62338 (https://tracker.ceph.com/issues/62338), we did not choose
+  to condition the fix on a server flag in order to simplify backporting.  As
+  a result, in rare cases it may be possible for a PG to flip between two acting
+  sets while an upgrade to a version with the fix is in progress.  If you observe
+  this behavior, you should be able to work around it by completing the upgrade or
+  by disabling async recovery by setting osd_async_recovery_min_cost to a very
+  large value on all OSDs until the upgrade is complete:
+  ``ceph config set osd osd_async_recovery_min_cost 1099511627776``
 
 >=19.0.0