---
id: pr-vllm-40105
repo: vllm-project/vllm
pr: 40105
title: '[Bugfix] Add Marlin kernel in block scaled mm kernel selection.'
author: maralbahari
date: '2026-04-17'
url: https://github.com/vllm-project/vllm/pull/40105
source_category: upstream-code
architectures:
- sm100
tags:
- GDN
- Marlin
- gemm_quant
techniques:
- fine-grained-quantization
hardware_features: []
kernel_types:
- gemm
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: c0c98b8b9a392c7e8b36b68cf477e245dda48d80
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/kernels/linear/__init__.py
artifact_dir: evidence/pull-bundles/vllm/gh-40105
head_ref_oid: 47ad3f725eeb7026b82554b820d1f2b420b02b7b
---
# [Bugfix] Add Marlin kernel in block scaled mm kernel selection.

- Repository: `vllm-project/vllm`
- PR: [40105](https://github.com/vllm-project/vllm/pull/40105)
- 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/kernels/linear/__init__.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-40105`
