---
id: pr-vllm-21093
repo: vllm-project/vllm
pr: 21093
title: '[Attention] Make local attention backend agnostic'
author: LucasWilkinson
date: '2025-07-18'
url: https://github.com/vllm-project/vllm/pull/21093
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 89cab4d01f83f8def180e723cee30c7ef8c53e86
inclusion_reason: defer
changed_paths:
- vllm/v1/attention/backends/flash_attn.py
- vllm/v1/attention/backends/flashinfer.py
- vllm/v1/attention/backends/rocm_aiter_fa.py
- vllm/v1/attention/backends/triton_attn.py
- vllm/v1/attention/backends/utils.py
- vllm/v1/core/single_type_kv_cache_manager.py
- vllm/v1/kv_cache_interface.py
- vllm/v1/worker/gpu_model_runner.py
artifact_dir: evidence/pull-bundles/vllm/gh-21093
head_ref_oid: 95055534330c2c523eafe13b2246a38e7e6b5bb0
---
# [Attention] Make local attention backend agnostic

- Repository: `vllm-project/vllm`
- PR: [21093](https://github.com/vllm-project/vllm/pull/21093)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `vllm/v1/attention/backends/flash_attn.py`
- `vllm/v1/attention/backends/flashinfer.py`
- `vllm/v1/attention/backends/rocm_aiter_fa.py`
- `vllm/v1/attention/backends/triton_attn.py`
- `vllm/v1/attention/backends/utils.py`
- `vllm/v1/core/single_type_kv_cache_manager.py`
- `vllm/v1/kv_cache_interface.py`
- `vllm/v1/worker/gpu_model_runner.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-21093`
