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NEWS: Added NEWS for v1.20.1-rc1 - v1.20.x #11270

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Merged
yosefe merged 3 commits into from
Mar 19, 2026
Merged

NEWS: Added NEWS for v1.20.1-rc1 - v1.20.x #11270

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NEWS: Added NEWS for v1.20.1-rc1
roiedanino Mar 18, 2026
49aaea5
NEWS: rephrased 2 lines
roiedanino Mar 18, 2026
121a666
NEWS: added ROCM section, rephrased ucp_config_modify fix
roiedanino Mar 18, 2026
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31 changes: 30 additions & 1 deletion NEWS
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Expand Up @@ -11,7 +11,36 @@
### Features:
### Bugfixes:

## 1.20.0
## 1.20.1-rc1 (March 18, 2026)
### Features:
#### RDMA CORE (IB, ROCE, etc.)
* Added 'auto' option for UCX_IB_MLX5_DEVX_OBJECTS which disables DevX when ODP is available (for Grace)
* Prioritize routes with longer subnet masks for improved reachability check accuracy
#### Documentation
* Clarified that user buffer can be modified after calling ucp_atomic_op_nbx
### Bugfixes:
#### UCP
* Increased TLS info buffer size in transport selection to prevent potential truncation
* Fixed incorrect warning about valid environment variable names
* Fixed ucp_config_modify not reporting an error when no matching modifiable configuration exists.
#### RDMA CORE (IB, ROCE, etc.)
* Fixed DevX objects flag handling
* Fixed device memory allocation alignment in MLX5 DevX
* Fixed IB memory handle flags enum order
* Disabled indirect atomic registration for Direct NIC
* Fixed stale destination endpoint ID and acks from before connection reset in UD transport
* Fix RoCE reachable route check when node_guuid is not unique among HCAs
#### CUDA
* Fixed CUDA context handling for system device during rkey unpack
#### ROCM
* Fixed HSA memory type check for newer ROCm releases

@edgargabriel edgargabriel Mar 18, 2026

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should this entry be in a separate ####ROCM section instead of under CUDA?

@roiedanino roiedanino Mar 18, 2026

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Absolutely, will fix this

#### UCS
* Fixed rcache locking for GDR copy
#### Packaging
* Fix libnvidia-compute removal from ucx-cuda debian package dependencies, breaking existing installation
* Obsoleted KNEM sub-package

## 1.20.0 (December 2, 2025)
### Features:
#### UCP
* Added new GPU device API for direct GPU-to-GPU communication
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