---
id: pr-vllm-21121
repo: vllm-project/vllm
pr: 21121
title: '[Bugfix] Allocate less memory in non-batched CUTLASS MoE'
author: ElizaWszola
date: '2025-07-18'
url: https://github.com/vllm-project/vllm/pull/21121
source_category: upstream-code
architectures:
- sm100
tags:
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features: []
kernel_types:
- moe
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 4adc66f64d56338489d00d94de6e13d95741c4be
inclusion_reason: kernel file changes
changed_paths:
- vllm/model_executor/layers/fused_moe/cutlass_moe.py
head_ref_oid: 1712fc49f7007fc6f67481be76cc7e92bcad833a
artifact_dir: evidence/pull-bundles/vllm/gh-21121
---
# [Bugfix] Allocate less memory in non-batched CUTLASS MoE

- Repository: `vllm-project/vllm`
- PR: [21121](https://github.com/vllm-project/vllm/pull/21121)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/model_executor/layers/fused_moe/cutlass_moe.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-21121`
