# drbd-9.1.23 and drbd-9.2.12 **URL:** \ **Category:** Release Announcements\ **Tags:** drbd\ **Created:** [November 18, 2024, 2:18pm UTC](https://forums.linbit.com/t/drbd-9-1-23-and-drbd-9-2-12/440 "2024-11-18T14:18:24Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![phil\_reisner](https://avatars.discourse-cdn.com/v4/letter/p/779978/32.png) [@phil\_reisner](https://forums.linbit.com/u/phil_reisner)\ **Post date:** [November 18, 2024, 2:18pm UTC](https://forums.linbit.com/t/drbd-9-1-23-and-drbd-9-2-12/440/1 "2024-11-18T14:18:24Z")
Hello DRBD-users, This DRBD release is about four weeks late compared to the usual release pace. The reasons for this are that the discovery of fresh bugs was a bit slow in this cycle, and those bugs were hard to crack. It took some time to understand both bugs to the extent that it allowed us to write reproducers for our test suite. By the way, the customer affected by one of these issues run more than 22,000 drbd resources in a linstor cluster stretching over more than 350 nodes, with about 7.9 PB under LINSTOR management. The DRBD RDMA transport depended on the behavior of the Melanox cards. We fixed that and verified the improvements by running it on intel RDMA cards. Last but not least, we invested quite some time in tracking all Linux upstream developments and have DRBD compatible with 6.11 and the yesterday-released 6.12 kernels. I intend to branch off a new series (e.g., 9.4.x) soon, and I will no longer do releases in the 9.1.x branch. We will discontinue support for RHEL7 kernels (and distros equally old) with the new branch. We will add performance improvements for the data path, features for multi-site deployments, and an optionally new way of doing resyncs. PS: That restores compatibility with the Debian Bookworm kernel. The     Debian kernel mainers cherry-picked a very recent upstream commit     from Linux 6.12. 9.2.12 (api:genl2/proto:86-101,118-122/transport:19) -------- \* Fix a complicated distributed deadlock corner case that caused    DRBD to being unable to reconnect after losing connection during    a resync \* Fix the RDMA transport for use with an intel card; fixed various    aspects where we depended on Mellanox cards' behavior \* Changes merged from 9.1.22   - Fix a corner case that can happen when DRBD establishes multiple     connections in parallel, which could lead one connection to end up in     an inconsistent replication state of WFBitMapT/Established   - Fix a corner case in which a reconciliation resync ends up in     WFBitMapT/Established   - Restrict protocol compatibility to the most recent 8.4 and 9.0 releases   - Fix a corner case causing a module ref leak on drbd\_transport\_tcp;     if it hits, you can not rmmod it   - rate-limit resync progress while resync is paused   - resync-target inherits history UUIDs when resync finishes,     this can prevent unexpected "unrelared data" events later   - Updated compatibility code for Linux 6.11 and 6.12 [https://pkg.linbit.com//downloads/drbd/9/drbd-9.2.12.tar.gz](https://pkg.linbit.com//downloads/drbd/9/drbd-9.2.12.tar.gz) > [https://pkg.linbit.com//downloads/drbd/9/drbd-9.1.23.tar.gz](https://pkg.linbit.com//downloads/drbd/9/drbd-9.1.23.tar.gz) > cheers, Philipp