---
id: pr-vllm-14681
repo: vllm-project/vllm
pr: 14681
title: '[Bugfix][IPEX] Add `VLLM_CPU_MOE_PREPACK` to allow disabling MoE prepack when CPU does not support it'
author: gau-nernst
date: '2025-03-14'
url: https://github.com/vllm-project/vllm/pull/14681
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: 95d680b8620b4f1a087a2857142a05c15c45aceb
inclusion_reason: kernel file changes
changed_paths:
- docs/source/getting_started/installation/cpu.md
- vllm/envs.py
- vllm/model_executor/layers/fused_moe/layer.py
head_ref_oid: 1b16188db7659df540730cc18adf02cd8f4a09ef
artifact_dir: evidence/pull-bundles/vllm/gh-14681
---
# [Bugfix][IPEX] Add `VLLM_CPU_MOE_PREPACK` to allow disabling MoE prepack when CPU does not support it

- Repository: `vllm-project/vllm`
- PR: [14681](https://github.com/vllm-project/vllm/pull/14681)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `docs/source/getting_started/installation/cpu.md`
- `vllm/envs.py`
- `vllm/model_executor/layers/fused_moe/layer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-14681`
