---
id: pr-vllm-21419
repo: vllm-project/vllm
pr: 21419
title: '[V1] Fix local chunked attention always disabled'
author: sarckk
date: '2025-07-23'
url: https://github.com/vllm-project/vllm/pull/21419
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: 78c13e30e1641869672b4c5fb7685d04e58ca1df
inclusion_reason: kernel file changes
changed_paths:
- vllm/attention/layer.py
head_ref_oid: 725429eb8b811a30f2d76886c22d6124a84d0a6b
artifact_dir: evidence/pull-bundles/vllm/gh-21419
---
# [V1] Fix local chunked attention always disabled

- Repository: `vllm-project/vllm`
- PR: [21419](https://github.com/vllm-project/vllm/pull/21419)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/attention/layer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-21419`
