This release brings several major features and improvements:

• NVMe Key-Value (KV) command set: NVMe driver gained support for the KV command set.
• JSON-RPC schema generation: JSON schema is now the source of truth for most RPC parameter decoders, helpers and Python CLI help text.
• JSON-RPC client batching: Clients can now issue multiple requests in a single send.
• NVMe-oF Duplicate Host Policy: New target option provides a basic IO fencing mechanism by restricting hostid reuse across controllers.
• Global default multipath configuration: bdev_nvme now accepts global multipath defaults (with optional per-controller overrides at attach time), so users no longer have to set multipath policy after every attach.
• Trace shared-memory layout refactor: spdk_trace_file is now a sequence of typed sections with a section table, external readers that depend on the old layout must be rebuilt.
• Per-IO-size buffer pool selection: The NVMe-oF transport now selects a buffer from a pool based on IO size, letting a large IO use one large buffer instead of many small ones, improving bandwidth and latency for large IOs.
• NVMe spec compliance for DSM and Write Zeroes limits: bdev_nvme now respects controller-advertised DMRSL/DMRL/WZSL and transparently splits oversized I/O, the NVMe-oF target reports DMRL/DMRSL/DMSL as a coherent triple and stops rejecting Write Zeroes above WZSL with INVALID_FIELD.
• NUMA-aware vfio-user transport: The transport now assigns a NUMA node ID to each endpoint, requires subsystem listeners and namespaces to match it, and steers new qpairs to poll groups on the same NUMA node.
• Continued bdev and bdev_nvme thread synchronization cleanup: Removed another dozen locks and formalized an app-thread contract, building on the synchronization work from v26.01.
• Smarter namespace hotplug: Namespace Attribute Changed AERs now drive re-identification from the Changed Namespace List log page instead of a full Identify Active Namespace enumeration.

You can view the full changelog here. Deprecation notices for users upgrading from previous releases are available here.

New Contributors

This release includes 658 commits from 59 authors, with over 37k lines of code changed.

We’d especially like to recognize our first-time contributors:

• Alexey Alyaev
• Arsenii Ermilov
• Denys Hlushkov
• Pengpeng Hou
• Lukasz Kornicki
• Pablo de Lara
• Ligj Linn
• Max Makarov
• Sri Nishanth Molleti
• Scott Morris
• Rui Oliveira
• Jeff Olivier
• Prakhar Pandey
• Puspak Sahu
• Rafal Szczepaniak
• Yuan Xin

Many thanks to everyone for your contributions, participation, and effort!

This release brings the following major features and improvements:

• NVMe 2.0 support for NVMe-oF target: SPDK NVMe-oF target now supports all required NVMe 2.0 features.
• JSON-RPC schema validation: Extensive validation added for JSON-RPC parameters to ensure correctness
• NVMe-oF target RDMA transport interrupt support
• NVMe-oF target preempt-and-abort reservation support
• NVMe-oF target additional passthrough support: Support for FW operations, security send/recv, sanitize, get/set features, and more
• Improved bdev and bdev/nvme thread synchronization: Reduced locking cases by half, several races identified and fixed
• Hot remove support for uring and aio bdev modules
• Write uncorrectable command support: Support added to the bdev layer, and plumbed through the bdev/nvme module
• AMD AE4DMA DMA engine support
• CUDA accel module: Used to support offloading XOR, FILL and COPY operations to GPUs
• DPDK 25.11: SPDK’s DPDK submodule was updated to the DPDK 25.11 release.

You can view the full changelog here. Deprecation notices for users upgrading from previous releases are available here.

New Contributors

This release includes 567 commits from 48 authors, with over 27k lines of code changed.

We’d especially like to recognize our first-time contributors:

• Modali Bhagyada
• Nelson Bighetti
• Omer Brezel
• Tiago Castro
• Valerii Hlushkov
• Adarsh Pradhan JMT
• Volodymyr Khrystenko
• Vineet Madan
• Umang Patel
• Vinoth Rajagopal
• Abhilash Shetty
• Maneesh Singhal
• Thore Sommer

Many thanks to everyone for your contributions, participation, and effort!

Presentations from some of the topics discussed this year can be found here.

The event was a huge hit, and we look forward to more in the future!

This release brings several major features and improvements:

• NVMe 1.4 support for NVMe-oF target: SPDK NVMe-oF target now supports all required NVMe 1.4 features.
• NVMe-oF NSSR support: Added NVMe Subsytem Reset to NVMe-oF target, see (nvmf documentation)[https://spdk.io/doc/nvmf.html] for more information.
• NVMe-oF optimal and preferred I/O sizes: SPDK NVMe-oF target now reports preferred write and unmap alignments, preferred write and unmap granularity, and optimal write size, for bdevs that provide this information.
• Block device optimal and preferred I/O sizes: SPDK bdev layer and the nvme bdev module now report optimal and preferred I/O sizes for write and unmap commands.
• DPDK 25.07: SPDK’s DPDK submodule was updated to the DPDK 25.07 release.
• Read-only Ceph RBD bdevs: SPDK’s bdev_rbd module now supports read-only bdevs.
• Improved NVMe driver logging: Logging in the nvme driver was significantly improved to provide more information about controllers and queue pairs.
• Improved Python code packaging: Python CLI-related code was refactored to make it easier to package SPDK’s Python code.

This release contains fix (8981ddb1) for (CVE-2025-57275)[https://www.cve.org/CVERecord?id=CVE-2025-57275].

You can view the full changelog here. Deprecation notices for users upgrading from previous releases are available here.

New Contributors

This release includes 374 commits from 61 authors, with over 48k lines of code changed.

We’d especially like to recognize our first-time contributors:

• Avri Altman
• Pravin M Bathija
• Liu Cheng
• Dor Deri
• Colin Dorsey
• Amit Engel
• Ori Evron
• Vladislav Fedyaev
• Kou Jiawei
• Jinhong Kim
• Karol Kolacinski
• Andrey Korzinev
• Fedor Kukso
• Zhipeng Li
• Brian Meagher
• Jiri Novak
• Omar Pakker
• Huang Shijie
• Ramkumar S
• Mingbao Sun
• Mariusz Tkaczyk
• Evan Webster
• Przemyslaw Wielgo
• Tomas Winkler

Many thanks to everyone for your contributions, participation, and effort!

This release contains fix (8981ddb1) for (CVE-2025-57275)[https://www.cve.org/CVERecord?id=CVE-2025-57275].

Many thanks to everyone for your contributions, participation, and effort!

Jacek has been a key contributor to SPDK over the last 6 years with over 300 patches in a wide range of components, including the nvmf target, nvme driver, and socket, bdev and accel libraries. Jacek is from Nutanix and is based in Gdansk, Poland.

Thanks,

Jim Harris (representing the core maintainer team)

Please visit Core Maintainers for further details on the core maintainer team and their responsibilities.

SPDK Developer Meetups are a great opportunity to network with other SPDK contributors, discuss new or ongoing SPDK feature development, learn about SPDK and to build the SPDK community.

Meetups are relatively informal but highly technical, working through a broad range of agenda items including the following:

• Introductory presentations on the technical topics for solidifying understanding of key concepts especially for new contributors to certain areas of SPDK
• Open discussions and brainstorming sessions on new features or process improvements
• Collaborative whiteboard design work
• Code walkthroughs
• Focused time on specific patchsets to accelerate progress

We typically start day 1 with a session on building the agenda for the meetup. If you have specific topics you are interested in presenting or having others present, it is helpful to reach out to the organizers ahead of time.

Seating is somewhat limited, so please RSVP as soon as possible to secure your seats at the meetup. Attendance will initially be restricted to 2 engineers per company, with exceptions for those actively contributing to SPDK.

Link: Invitation

Tomek Zawadzki [tomasz.zawadzki@nutanix.com]
Jim Harris [jim.harris@nvidia.com]

Location:

Nutanix
9 Hills Road
Cambridge, CB2 1GE, United Kingdom

Map

Dates:

06/11/2025, 8:30 am - 5:00 pm
07/11/2025, 8:30 am - 5:00 pm

By Jean-Christophe BENOIST - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=39896996

This release is a Long Term Support (LTS) version and will be supported until SPDK v26.01 LTS. The next SPDK release, v25.09, is planned for the end of September.

This release brings several major features and improvements:

• NVMe PCIe Interrupt Mode: The NVMe library and NVMe bdev module now support interrupt mode for PCIe transport in the primary process.
• DIF Insert and Strip: The bdev layer can now generate and verify data integrity by inserting and stripping DIF from I/O.
• mlx5 Accel Platform Driver: Adds a new mlx5 platform driver capable of offloading the execution of a sequence of RDMA_READ/RDMA_WRITE and encrypt/decrypt operations in a single step.

You can view the full changelog here. Deprecation notices for users upgrading from previous releases are available here.

SPDK Transition to the Linux Foundation

This is the first SPDK release after our transition to the Linux Foundation. The project, now under the guidance of the SPDK Technical Steering Committee (TSC), has:

• Welcomed Mateusz Kozlowski as a Core Maintainer,
• Brought forth SPDK Component Maintainers,
• Established the open source SPDK-CI infrastructure.

New Contributors

This release includes 508 commits from 65 authors, with over 23k lines of code changed.

We’d especially like to recognize our first-time contributors:

• Pawel Baldysiak
• Gil Bregman
• Kaiqi Chen
• Joel Cunningham
• Saravanan D
• Anton Einax
• Eric Gouriou
• Kalyan Kadiyala
• Nadja Brix Koch
• Nitheesh Prakash
• Xu Qi
• Ed Reed
• Siddhu Swarup
• Yoray Zack
• Sun Zhenliang

Many thanks to everyone for your contributions, participation, and effort!

The SPDK CI at Intel, which drives the vast majority of per-patch and nightly testing, will be permanently turned off Tuesday, December 17 (morning CEST). SPDK Gerrit will be shutdown Thursday, December 19 (morning CEST), to enable transition of the Gerrit instance from Intel to the LF. All efforts are being made to ensure no Gerrit data is lost during the transition. There are no changes to the SPDK GitHub repositories as part of this transition.

No more patches will be merged to the SPDK master branch starting immediately. Patch merges will resume when the SPDK LF project establishes a new CI and the SPDK Gerrit instance is restored under the LF. Any services or local repositories currently pointing to Gerrit can be pointed to the SPDK GitHub repositories while the transition is in progress. SPDK GitHub is an exact mirror, as always, of the current state of all SPDK Gerrit branches.

The SPDK LF project is actively working on the transition and will provide updates as details become available. Please contact Rob Mills from Nutanix with any questions about the SPDK LF project transition.

Thanks,

Jim Harris (on behalf of the SPDK core maintainers and SPDK LF project)

While Intel will be divesting from the project, we remain committed to supporting the community during this transition. We are actively working with the Linux Foundation to establish a Technical Steering Committee that will oversee the project’s future direction. During the transition period, there may be some temporary disruptions to services such as code reviews and continuous integration. We apologize for any inconvenience this may cause and will provide updates on the status of these services. Please check back here or on Slack for updates.

We would like to express our sincere gratitude to the SPDK community for their contributions over the past decade. Your dedication and hard work have made SPDK a valuable resource for the storage industry. We wish the SPDK community continued success under the stewardship of the Linux Foundation.

Thank you,
Bill Pearson, Vice President, Intel Data Center & AI Group
Paul Luse, Principal Engineer, Intel Data Center & AI Group
(direct questions to Paul.E.Luse@intel.com)