From: Yuri Weinstein <yweinste@redhat.com>
Date: Wed, 14 Feb 2024 16:18:25 +0000 (-0800)
Subject: Merge pull request #55427 from idryomov/wip-63341-reef
X-Git-Tag: v18.2.4~277
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=b0b5f61e51f153b41b45f1c5621a45811a4a8e5c;p=ceph.git

Merge pull request #55427 from idryomov/wip-63341-reef

reef: librbd: improve rbd_diff_iterate2() performance in fast-diff mode

Reviewed-by: Mykola Golub <mgolub@suse.com>
---

b0b5f61e51f153b41b45f1c5621a45811a4a8e5c
diff --cc PendingReleaseNotes
index 6722b1f8fe1c,d7a8ed26d25b..2c82b13311d1
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@@ -1,5 -1,16 +1,14 @@@
+ >=18.2.2
+ --------
+ 
+ * RBD: When diffing against the beginning of time (`fromsnapname == NULL`) in
+   fast-diff mode (`whole_object == true` with `fast-diff` image feature enabled
+   and valid), diff-iterate is now guaranteed to execute locally if exclusive
+   lock is available.  This brings a dramatic performance improvement for QEMU
+   live disk synchronization and backup use cases.
+ 
  >=19.0.0
  
 -* The cephfs-shell utility is now packaged for RHEL 9 / CentOS 9 as required
 -  python dependencies are now available in EPEL9.
  * RGW: S3 multipart uploads using Server-Side Encryption now replicate correctly in
    multi-site. Previously, the replicas of such objects were corrupted on decryption.
    A new tool, ``radosgw-admin bucket resync encrypted multipart``, can be used to