---
id: pr-sglang-19189
repo: sgl-project/sglang
pr: 19189
title: Fix fallback to default tactic (flashinfer autotuner) with trtllm_fp4_block_scale_moe
author: wenscarl
date: '2026-03-06'
url: https://github.com/sgl-project/sglang/pull/19189
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 61de303f0a14d2aa7941431ce53ed02367d8227b
inclusion_reason: defer
changed_paths:
- python/sglang/srt/layers/moe/fused_moe_triton/layer.py
- python/sglang/srt/layers/moe/moe_runner/flashinfer_trtllm.py
- python/sglang/srt/layers/quantization/compressed_tensors/schemes/compressed_tensors_w4a4_nvfp4_moe.py
artifact_dir: evidence/pull-bundles/sglang/gh-19189
head_ref_oid: 4411bf68c2e78afe08d794a2e844f843c5915c36
---
# Fix fallback to default tactic (flashinfer autotuner) with trtllm_fp4_block_scale_moe

- Repository: `sgl-project/sglang`
- PR: [19189](https://github.com/sgl-project/sglang/pull/19189)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `python/sglang/srt/layers/moe/fused_moe_triton/layer.py`
- `python/sglang/srt/layers/moe/moe_runner/flashinfer_trtllm.py`
- `python/sglang/srt/layers/quantization/compressed_tensors/schemes/compressed_tensors_w4a4_nvfp4_moe.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-19189`
