---
id: pr-vllm-23734
repo: vllm-project/vllm
pr: 23734
title: '[Feature] Support Decode Context Parallel (DCP) for MLA'
author: youzhedian
date: '2025-09-06'
url: https://github.com/vllm-project/vllm/pull/23734
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- mla
- pipeline-stages
techniques:
- pipeline-stages
hardware_features: []
kernel_types:
- attention
- decode
- mla
languages:
- cuda-cpp
- triton
captured_at: '2026-04-27'
status: merged
merge_sha: ac201a0eaf2af032779db3e7ac96f857cbaa5b7a
inclusion_reason: kernel file changes
changed_paths:
- .buildkite/test-pipeline.yaml
- csrc/cache.h
- csrc/cache_kernels.cu
- csrc/torch_bindings.cpp
- tests/distributed/test_context_parallel.py
- vllm/_custom_ops.py
- vllm/attention/ops/common.py
- vllm/attention/ops/flashmla.py
- vllm/config/parallel.py
- vllm/distributed/parallel_state.py
- vllm/engine/arg_utils.py
- vllm/v1/attention/backends/mla/common.py
- vllm/v1/attention/backends/mla/cutlass_mla.py
- vllm/v1/attention/backends/mla/flashattn_mla.py
- vllm/v1/attention/backends/mla/flashmla.py
- vllm/v1/attention/backends/mla/rocm_aiter_mla.py
- vllm/v1/attention/backends/mla/triton_mla.py
- vllm/v1/core/kv_cache_coordinator.py
- vllm/v1/core/kv_cache_manager.py
- vllm/v1/core/kv_cache_utils.py
- vllm/v1/core/sched/scheduler.py
- vllm/v1/core/single_type_kv_cache_manager.py
- vllm/v1/kv_cache_interface.py
- vllm/v1/worker/block_table.py
- vllm/v1/worker/gpu_model_runner.py
- vllm/v1/worker/gpu_worker.py
- vllm/worker/worker.py
head_ref_oid: b0f734653d985c77f95e29163d049ea19cf4ad30
artifact_dir: evidence/pull-bundles/vllm/gh-23734
---
# [Feature] Support Decode Context Parallel (DCP) for MLA

- Repository: `vllm-project/vllm`
- PR: [23734](https://github.com/vllm-project/vllm/pull/23734)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `.buildkite/test-pipeline.yaml`
- `csrc/cache.h`
- `csrc/cache_kernels.cu`
- `csrc/torch_bindings.cpp`
- `tests/distributed/test_context_parallel.py`
- `vllm/_custom_ops.py`
- `vllm/attention/ops/common.py`
- `vllm/attention/ops/flashmla.py`
- `vllm/config/parallel.py`
- `vllm/distributed/parallel_state.py`
- `vllm/engine/arg_utils.py`
- `vllm/v1/attention/backends/mla/common.py`
- `vllm/v1/attention/backends/mla/cutlass_mla.py`
- `vllm/v1/attention/backends/mla/flashattn_mla.py`
- `vllm/v1/attention/backends/mla/flashmla.py`
- `vllm/v1/attention/backends/mla/rocm_aiter_mla.py`
- `vllm/v1/attention/backends/mla/triton_mla.py`
- `vllm/v1/core/kv_cache_coordinator.py`
- `vllm/v1/core/kv_cache_manager.py`
- `vllm/v1/core/kv_cache_utils.py`
- `vllm/v1/core/sched/scheduler.py`
- `vllm/v1/core/single_type_kv_cache_manager.py`
- `vllm/v1/kv_cache_interface.py`
- `vllm/v1/worker/block_table.py`
- `vllm/v1/worker/gpu_model_runner.py`
- `vllm/v1/worker/gpu_worker.py`
- `vllm/worker/worker.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-23734`
