---
id: pr-vllm-20166
repo: vllm-project/vllm
pr: 20166
title: '[Bugfix] Fix topk_ids indices_type for CUTLASS w8a8 FP8 MoE'
author: minosfuture
date: '2025-07-08'
url: https://github.com/vllm-project/vllm/pull/20166
source_category: upstream-code
architectures:
- sm100
tags:
- fp8
- kernel-fusion
- moe
- quantization
techniques:
- kernel-fusion
hardware_features:
- fp8
kernel_types:
- moe
- quantization
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: c438183e99ae8a7a85f3de0180c762c197c1dd76
inclusion_reason: kernel file changes
changed_paths:
- csrc/quantization/cutlass_w8a8/moe/moe_data.cu
- vllm/model_executor/layers/fused_moe/pplx_prepare_finalize.py
- vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py
head_ref_oid: beeba9a19cb9796933b2a9dfb4435dbca1110fd2
artifact_dir: evidence/pull-bundles/vllm/gh-20166
---
# [Bugfix] Fix topk_ids indices_type for CUTLASS w8a8 FP8 MoE

- Repository: `vllm-project/vllm`
- PR: [20166](https://github.com/vllm-project/vllm/pull/20166)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/quantization/cutlass_w8a8/moe/moe_data.cu`
- `vllm/model_executor/layers/fused_moe/pplx_prepare_finalize.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-20166`
