---
id: pr-vllm-21003
repo: vllm-project/vllm
pr: 21003
title: Support mnnvl all2allv from Flashinfer
author: wenscarl
date: '2025-09-24'
url: https://github.com/vllm-project/vllm/pull/21003
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- kernel-fusion
- moe
- quantization
techniques:
- kernel-fusion
hardware_features:
- fp4
kernel_types:
- moe
- quantization
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 54e42b72dbf7ec259de1c28e66ea9575fe594685
inclusion_reason: kernel file changes
changed_paths:
- tests/kernels/moe/modular_kernel_tools/mk_objects.py
- vllm/distributed/device_communicators/all2all.py
- vllm/distributed/device_communicators/cuda_communicator.py
- vllm/distributed/device_communicators/mnnvl_compat.py
- vllm/envs.py
- vllm/model_executor/layers/fused_moe/flashinfer_cutlass_moe.py
- vllm/model_executor/layers/fused_moe/flashinfer_cutlass_prepare_finalize.py
- vllm/model_executor/layers/quantization/utils/flashinfer_fp4_moe.py
- vllm/model_executor/layers/quantization/utils/flashinfer_utils.py
- vllm/utils/flashinfer.py
head_ref_oid: e9fcf44e6b9624dfdaa9540556c4a1d05ee7b12e
artifact_dir: evidence/pull-bundles/vllm/gh-21003
---
# Support mnnvl all2allv from Flashinfer

- Repository: `vllm-project/vllm`
- PR: [21003](https://github.com/vllm-project/vllm/pull/21003)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/kernels/moe/modular_kernel_tools/mk_objects.py`
- `vllm/distributed/device_communicators/all2all.py`
- `vllm/distributed/device_communicators/cuda_communicator.py`
- `vllm/distributed/device_communicators/mnnvl_compat.py`
- `vllm/envs.py`
- `vllm/model_executor/layers/fused_moe/flashinfer_cutlass_moe.py`
- `vllm/model_executor/layers/fused_moe/flashinfer_cutlass_prepare_finalize.py`
- `vllm/model_executor/layers/quantization/utils/flashinfer_fp4_moe.py`
- `vllm/model_executor/layers/quantization/utils/flashinfer_utils.py`
- `vllm/utils/flashinfer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-21003`
