---
id: pr-vllm-19904
repo: vllm-project/vllm
pr: 19904
title: '[Bugfix][V1][ROCm] Fix AITER Flash Attention Backend (Fix API Break and Local Attention Logic: affecting Llama4)'
author: tjtanaa
date: '2025-06-26'
url: https://github.com/vllm-project/vllm/pull/19904
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 27c065df50407f6b801d0053378c442ccea37d39
inclusion_reason: defer
changed_paths:
- vllm/attention/layer.py
- vllm/v1/attention/backends/rocm_aiter_fa.py
artifact_dir: evidence/pull-bundles/vllm/gh-19904
head_ref_oid: 68d473078b6412a40341b575abbcfcac4dcf644f
---
# [Bugfix][V1][ROCm] Fix AITER Flash Attention Backend (Fix API Break and Local Attention Logic: affecting Llama4)

- Repository: `vllm-project/vllm`
- PR: [19904](https://github.com/vllm-project/vllm/pull/19904)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `vllm/attention/layer.py`
- `vllm/v1/attention/backends/rocm_aiter_fa.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-19904`
