---
id: pr-vllm-12807
repo: vllm-project/vllm
pr: 12807
title: '[Attention] Use FA3 for MLA on Hopper'
author: LucasWilkinson
date: '2025-02-06'
url: https://github.com/vllm-project/vllm/pull/12807
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- attention
- mla
techniques: []
hardware_features: []
kernel_types:
- attention
- mla
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: c786e757fae4519256e4ef88a7d4f56c3339d14d
inclusion_reason: kernel file changes
changed_paths:
- vllm/attention/backends/flash_attn.py
- vllm/attention/backends/mla/utils.py
- vllm/attention/backends/utils.py
- vllm/v1/attention/backends/flash_attn.py
head_ref_oid: 4a4754b0bbfc9f772b816737136a9bf5eb45c6f3
artifact_dir: evidence/pull-bundles/vllm/gh-12807
---
# [Attention] Use FA3 for MLA on Hopper

- Repository: `vllm-project/vllm`
- PR: [12807](https://github.com/vllm-project/vllm/pull/12807)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/attention/backends/flash_attn.py`
- `vllm/attention/backends/mla/utils.py`
- `vllm/attention/backends/utils.py`
- `vllm/v1/attention/backends/flash_attn.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-12807`
