---
id: pr-vllm-37539
repo: vllm-project/vllm
pr: 37539
title: '[Performance] Remove unnecessary zero-fill of MLA decode output tensor in Aiter backend'
author: xaguilar-amd
date: '2026-04-10'
url: https://github.com/vllm-project/vllm/pull/37539
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- mla
techniques: []
hardware_features: []
kernel_types:
- attention
- decode
- mla
languages:
- python
captured_at: '2026-04-17'
status: merged
merge_sha: f976e3b98ba45677a2213673a442c6cbff141e8e
inclusion_reason: kernel file changes
changed_paths:
- vllm/v1/attention/backends/mla/rocm_aiter_mla.py
head_ref_oid: 05d2da70928eadbc215cd079135adb6014d3e56d
artifact_dir: evidence/pull-bundles/vllm/gh-37539
---
# [Performance] Remove unnecessary zero-fill of MLA decode output tensor in Aiter backend

- Repository: `vllm-project/vllm`
- PR: [37539](https://github.com/vllm-project/vllm/pull/37539)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/v1/attention/backends/mla/rocm_aiter_mla.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-37539`
