---
id: pr-vllm-14258
repo: vllm-project/vllm
pr: 14258
title: '[Attention] FlashAttn MLA'
author: LucasWilkinson
date: '2025-09-04'
url: https://github.com/vllm-project/vllm/pull/14258
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- mla
techniques: []
hardware_features: []
kernel_types:
- attention
- mla
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 402759d4727d9a377598a09d06770770d4e184c6
inclusion_reason: kernel file changes
changed_paths:
- .buildkite/check-wheel-size.py
- cmake/external_projects/vllm_flash_attn.cmake
- docker/Dockerfile
- tests/kernels/attention/test_attention_selector.py
- tests/v1/attention/test_attention_backends.py
- tests/v1/attention/test_mla_backends.py
- tests/v1/attention/utils.py
- vllm/attention/utils/fa_utils.py
- vllm/engine/arg_utils.py
- vllm/envs.py
- vllm/platforms/cuda.py
- vllm/platforms/interface.py
- vllm/v1/attention/backends/flashinfer.py
- vllm/v1/attention/backends/linear_attn.py
- vllm/v1/attention/backends/mamba1_attn.py
- vllm/v1/attention/backends/mamba2_attn.py
- vllm/v1/attention/backends/mla/common.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/short_conv_attn.py
- vllm/v1/attention/backends/xformers.py
head_ref_oid: dd2516a5721585c1693953947e5df83820cb4bef
artifact_dir: evidence/pull-bundles/vllm/gh-14258
---
# [Attention] FlashAttn MLA

- Repository: `vllm-project/vllm`
- PR: [14258](https://github.com/vllm-project/vllm/pull/14258)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `.buildkite/check-wheel-size.py`
- `cmake/external_projects/vllm_flash_attn.cmake`
- `docker/Dockerfile`
- `tests/kernels/attention/test_attention_selector.py`
- `tests/v1/attention/test_attention_backends.py`
- `tests/v1/attention/test_mla_backends.py`
- `tests/v1/attention/utils.py`
- `vllm/attention/utils/fa_utils.py`
- `vllm/engine/arg_utils.py`
- `vllm/envs.py`
- `vllm/platforms/cuda.py`
- `vllm/platforms/interface.py`
- `vllm/v1/attention/backends/flashinfer.py`
- `vllm/v1/attention/backends/linear_attn.py`
- `vllm/v1/attention/backends/mamba1_attn.py`
- `vllm/v1/attention/backends/mamba2_attn.py`
- `vllm/v1/attention/backends/mla/common.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/short_conv_attn.py`
- `vllm/v1/attention/backends/xformers.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-14258`
