update release notes to note about compatibility requirement

Author: leofang

cuda_core/cuda/core/experimental/_device.pyx

@@ -4,7 +4,6 @@
 
 from libc.stdint cimport uintptr_t
 
-# TODO: how about cuda.bindings < 12.6.2?
 from cuda.bindings cimport cydriver
 
 from cuda.core.experimental._utils.cuda_utils cimport HANDLE_RETURN

cuda_core/cuda/core/experimental/_event.pyx

@@ -6,7 +6,6 @@ from __future__ import annotations
 
 from libc.stdint cimport uintptr_t
 
-# TODO: how about cuda.bindings < 12.6.2?
 from cuda.bindings cimport cydriver
 
 from cuda.core.experimental._utils.cuda_utils cimport (

cuda_core/cuda/core/experimental/_stream.pxd

@@ -2,7 +2,6 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-# TODO: how about cuda.bindings < 12.6.2?
 from cuda.bindings cimport cydriver
 
 

cuda_core/cuda/core/experimental/_stream.pyx

@@ -6,7 +6,6 @@ from __future__ import annotations
 
 from libc.stdint cimport uintptr_t
 
-# TODO: how about cuda.bindings < 12.6.2?
 from cuda.bindings cimport cydriver
 
 from cuda.core.experimental._utils.cuda_utils cimport (

cuda_core/cuda/core/experimental/_utils/cuda_utils.pxd

@@ -5,7 +5,6 @@
 cimport cpython
 from libc.stdint cimport int64_t
 
-# TODO: how about cuda.bindings < 12.6.2?
 from cuda.bindings cimport cydriver
 
 

cuda_core/docs/source/release/0.X.Y-notes.rst

@@ -20,6 +20,7 @@ Breaking Changes
 ----------------
 
 - **CUDA 11 support dropped**: CUDA 11 support is no longer tested and it may or may not work with cuda.bindings and CTK 11.x. Users are encouraged to migrate to CUDA 12.x or 13.x.
+- Support for ``cuda-bindings`` (and ``cuda-python``) < 12.6.2 is dropped. Internally, ``cuda.core`` now always requires the `new binding module layout <https://nvidia.github.io/cuda-python/cuda-bindings/latest/release/12.6.1-notes.html#cuda-namespace-cleanup-with-a-new-module-layout>`_. As per the ``cuda-bindings`` `support policy <https://nvidia.github.io/cuda-python/cuda-bindings/latest/support.html>`_), CUDA 12 users are encouraged to use the latest ``cuda-bindings`` 12.9.x, which is backward-compatible with all CUDA Toolkit 12.y.
 - **LaunchConfig grid parameter interpretation**: When :attr:`LaunchConfig.cluster` is specified, the :attr:`LaunchConfig.grid` parameter now correctly represents the number of clusters instead of blocks. Previously, the grid parameter was incorrectly interpreted as blocks, causing a mismatch with the expected C++ behavior. This change ensures that ``LaunchConfig(grid=4, cluster=2, block=32)`` correctly produces 4 clusters × 2 blocks/cluster = 8 total blocks, matching the C++ equivalent ``cudax::make_hierarchy(cudax::grid_dims(4), cudax::cluster_dims(2), cudax::block_dims(32))``.
 - When :class:`Buffer` is closed, :attr:`Buffer.handle` is now set to ``None``. It was previously set to ``0`` by accident.
 
@@ -49,3 +50,4 @@ Fixes and enhancements
 - Make :class:`Buffer` creation more performant.
 - Enabled :class:`MemoryResource` subclasses to accept :class:`Device` objects, in addition to previously supported device ordinals.
 - Fixed a bug in :class:`Stream` and other classes where object cleanup would error during interpreter shutdown.
+- General performance improvement.