---
id: pr-vllm-29125
repo: vllm-project/vllm
pr: 29125
title: '[Feature] Batch invariant: Enable `TRITON_MLA` without prefix-caching'
author: yewentao256
date: '2025-12-09'
url: https://github.com/vllm-project/vllm/pull/29125
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- mla
techniques: []
hardware_features: []
kernel_types:
- attention
- mla
languages:
- triton
captured_at: '2026-04-27'
status: merged
merge_sha: d9417096d1347ead26b7c0cc1afb22fc0028e6e8
inclusion_reason: kernel file changes
changed_paths:
- tests/v1/determinism/test_batch_invariance.py
- tests/v1/determinism/test_online_batch_invariance.py
- tests/v1/determinism/utils.py
- vllm/attention/layer.py
- vllm/model_executor/layers/batch_invariant.py
head_ref_oid: 9ecc612098a835ba1d4caffea550cc7f4161b89a
artifact_dir: evidence/pull-bundles/vllm/gh-29125
---
# [Feature] Batch invariant: Enable `TRITON_MLA` without prefix-caching

- Repository: `vllm-project/vllm`
- PR: [29125](https://github.com/vllm-project/vllm/pull/29125)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/v1/determinism/test_batch_invariance.py`
- `tests/v1/determinism/test_online_batch_invariance.py`
- `tests/v1/determinism/utils.py`
- `vllm/attention/layer.py`
- `vllm/model_executor/layers/batch_invariant.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-29125`
