---
id: pr-vllm-35382
repo: vllm-project/vllm
pr: 35382
title: 'fix(mxfp4): return is_monolithic=False when LoRA is enabled for Triton backend'
author: yoonsnowdev
date: '2026-03-01'
url: https://github.com/vllm-project/vllm/pull/35382
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- gemm_quant
- sm90
techniques:
- fine-grained-quantization
- kernel-fusion
hardware_features:
- fp4
- hopper
- mxfp4
kernel_types:
- gemm
- moe
languages:
- triton
captured_at: '2026-05-16'
status: merged
merge_sha: 5a435507d877f4eb16802095037d5c56e767c589
inclusion_reason: Inspect scale layout, accumulator type, tile/schedule choice, epilogue fusion, and partial-tile guards before deriving a candidate.
changed_paths:
- vllm/model_executor/layers/quantization/mxfp4.py
artifact_dir: evidence/pull-bundles/vllm/gh-35382
head_ref_oid: 2966c00a5da19f6a0c5f813c12f6dbb58aa306ed
---
# fix(mxfp4): return is_monolithic=False when LoRA is enabled for Triton backend

- Repository: `vllm-project/vllm`
- PR: [35382](https://github.com/vllm-project/vllm/pull/35382)
- Decision: `Inspect scale layout, accumulator type, tile/schedule choice, epilogue fusion, and partial-tile guards before deriving a candidate.`
- Reason: Inspect scale layout, accumulator type, tile/schedule choice, epilogue fusion, and partial-tile guards before deriving a candidate.

## Changed Paths

- `vllm/model_executor/layers/quantization/mxfp4.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-35382`
