---
id: pr-vllm-24385
repo: vllm-project/vllm
pr: 24385
title: '[Kernel] Support decode context parallelism on Blackwell with CUTLASS MLA'
author: minosfuture
date: '2025-09-08'
url: https://github.com/vllm-project/vllm/pull/24385
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- mla
techniques: []
hardware_features: []
kernel_types:
- attention
- decode
- mla
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 86173ad593ff2d0c699230c4c2cd3ee5715d6e5d
inclusion_reason: kernel file changes
changed_paths:
- csrc/attention/mla/sm100_cutlass_mla_kernel.cu
- csrc/torch_bindings.cpp
- tests/kernels/test_cutlass_mla_decode.py
- vllm/_custom_ops.py
- vllm/v1/attention/backends/mla/cutlass_mla.py
head_ref_oid: 1295bd25ec0e53238d89cf8233157fdc550d5ac2
artifact_dir: evidence/pull-bundles/vllm/gh-24385
---
# [Kernel] Support decode context parallelism on Blackwell with CUTLASS MLA

- Repository: `vllm-project/vllm`
- PR: [24385](https://github.com/vllm-project/vllm/pull/24385)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/attention/mla/sm100_cutlass_mla_kernel.cu`
- `csrc/torch_bindings.cpp`
- `tests/kernels/test_cutlass_mla_decode.py`
- `vllm/_custom_ops.py`
- `vllm/v1/attention/backends/mla/cutlass_mla.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-24385`
