---
id: pr-vllm-19351
repo: vllm-project/vllm
pr: 19351
title: '[Core] Support Local Chunked Attention for Hybrid KV Cache'
author: luccafong
date: '2025-07-19'
url: https://github.com/vllm-project/vllm/pull/19351
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 9a9fda1423c96aa8ea62a56e8f1ad88fc080ae2c
inclusion_reason: kernel file changes
changed_paths:
- tests/v1/core/test_specialized_manager.py
- vllm/attention/layer.py
- vllm/config.py
- vllm/v1/attention/backends/flash_attn.py
- vllm/v1/attention/backends/utils.py
- vllm/v1/core/kv_cache_utils.py
- vllm/v1/core/single_type_kv_cache_manager.py
- vllm/v1/kv_cache_interface.py
- vllm/v1/worker/gpu_model_runner.py
head_ref_oid: d48fb3cec31503a9a357e0275855594573f94a92
artifact_dir: evidence/pull-bundles/vllm/gh-19351
---
# [Core] Support Local Chunked Attention for Hybrid KV Cache

- Repository: `vllm-project/vllm`
- PR: [19351](https://github.com/vllm-project/vllm/pull/19351)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/v1/core/test_specialized_manager.py`
- `vllm/attention/layer.py`
- `vllm/config.py`
- `vllm/v1/attention/backends/flash_attn.py`
- `vllm/v1/attention/backends/utils.py`
- `vllm/v1/core/kv_cache_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-19351`
