---
id: pr-vllm-28431
repo: vllm-project/vllm
pr: 28431
title: Remove weight_scale.T special case for SM90 Block FP8 CUTLASS kernel
author: mgoin
date: '2025-11-11'
url: https://github.com/vllm-project/vllm/pull/28431
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: f9a4087182ffcd9404779fcda876f820b3b26d5f
inclusion_reason: defer
changed_paths:
- benchmarks/kernels/bench_block_fp8_gemm.py
- csrc/quantization/w8a8/cutlass/c3x/scaled_mm_blockwise_sm90_fp8_dispatch.cuh
- vllm/model_executor/layers/quantization/compressed_tensors/schemes/compressed_tensors_w8a8_fp8.py
- vllm/model_executor/layers/quantization/fp8.py
- vllm/model_executor/layers/quantization/utils/fp8_utils.py
artifact_dir: evidence/pull-bundles/vllm/gh-28431
head_ref_oid: b05eb0e2e61297c7bffaba021ba4ea2da9bd5d0a
---
# Remove weight_scale.T special case for SM90 Block FP8 CUTLASS kernel

- Repository: `vllm-project/vllm`
- PR: [28431](https://github.com/vllm-project/vllm/pull/28431)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `benchmarks/kernels/bench_block_fp8_gemm.py`
- `csrc/quantization/w8a8/cutlass/c3x/scaled_mm_blockwise_sm90_fp8_dispatch.cuh`
- `vllm/model_executor/layers/quantization/compressed_tensors/schemes/compressed_tensors_w8a8_fp8.py`
- `vllm/model_executor/layers/quantization/fp8.py`
- `vllm/model_executor/layers/quantization/utils/fp8_utils.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-28431`
