---
id: pr-vllm-29213
repo: vllm-project/vllm
pr: 29213
title: '[Perf][Kernels] Enable FlashInfer DeepGEMM swapAB on SM90 (for W8A8 Linear Op)'
author: katec846
date: '2026-01-07'
url: https://github.com/vllm-project/vllm/pull/29213
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- fp8
- gemm
- quantization
techniques: []
hardware_features:
- fp8
kernel_types:
- gemm
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: cc6dafaef2bc6b0a3ea0d80efc93985fce6bc8b9
inclusion_reason: kernel file changes
changed_paths:
- tests/kernels/quantization/test_block_fp8.py
- vllm/envs.py
- vllm/model_executor/layers/quantization/utils/fp8_utils.py
- vllm/utils/flashinfer.py
head_ref_oid: 1ff67c21e452722d6bd325b6931b7f724d7d1170
artifact_dir: evidence/pull-bundles/vllm/gh-29213
---
# [Perf][Kernels] Enable FlashInfer DeepGEMM swapAB on SM90 (for W8A8 Linear Op)

- Repository: `vllm-project/vllm`
- PR: [29213](https://github.com/vllm-project/vllm/pull/29213)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/kernels/quantization/test_block_fp8.py`
- `vllm/envs.py`
- `vllm/model_executor/layers/quantization/utils/fp8_utils.py`
- `vllm/utils/flashinfer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-29213`
