---
id: pr-vllm-21153
repo: vllm-project/vllm
pr: 21153
title: '[Attention][DBO] Add support for "splitting" the CommonAttentionMetadata'
author: SageMoore
date: '2025-08-02'
url: https://github.com/vllm-project/vllm/pull/21153
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: 0edaf752d7482a3c170c25376c466e730ab87ddd
inclusion_reason: kernel file changes
changed_paths:
- tests/v1/attention/test_attention_splitting.py
- vllm/v1/attention/backends/utils.py
head_ref_oid: 927a2577e47ea7bd607c726ba213aa37cbd20344
artifact_dir: evidence/pull-bundles/vllm/gh-21153
---
# [Attention][DBO] Add support for "splitting" the CommonAttentionMetadata

- Repository: `vllm-project/vllm`
- PR: [21153](https://github.com/vllm-project/vllm/pull/21153)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/v1/attention/test_attention_splitting.py`
- `vllm/v1/attention/backends/utils.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-21153`
