---
id: pr-vllm-26397
repo: vllm-project/vllm
pr: 26397
title: '[Attention] Add MLA prefill backend: trtllm_ragged_attention_deepseek'
author: minosfuture
date: '2025-10-24'
url: https://github.com/vllm-project/vllm/pull/26397
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 0f67d4d962872767ac1fca8e98d1bb679aae762a
inclusion_reason: defer
changed_paths:
- vllm/envs.py
- vllm/v1/attention/backends/mla/common.py
artifact_dir: evidence/pull-bundles/vllm/gh-26397
head_ref_oid: 4389e19b90ff6ece1ba3a48878669531b0958e6c
---
# [Attention] Add MLA prefill backend: trtllm_ragged_attention_deepseek

- Repository: `vllm-project/vllm`
- PR: [26397](https://github.com/vllm-project/vllm/pull/26397)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `vllm/envs.py`
- `vllm/v1/attention/backends/mla/common.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-26397`
