---
id: pr-sglang-19150
repo: sgl-project/sglang
pr: 19150
title: '[NVIDIA] Integrate FlashInfer decode kernel (Blackwell) for Qwen3.5'
author: kaixih
date: '2026-03-18'
url: https://github.com/sgl-project/sglang/pull/19150
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
techniques: []
hardware_features: []
kernel_types:
- attention
- decode
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 4cc19862efded3a4aff44aafa8dcd87be8cff5c2
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/layers/attention/linear/gdn_backend.py
- python/sglang/srt/layers/attention/linear/kernels/gdn_flashinfer.py
- python/sglang/srt/server_args.py
- python/sglang/test/accuracy_test_runner.py
- test/registered/4-gpu-models/test_qwen35_models.py
head_ref_oid: aa4449af1b36575f7dec7fb8d79a62f8f9aa7397
artifact_dir: evidence/pull-bundles/sglang/gh-19150
---
# [NVIDIA] Integrate FlashInfer decode kernel (Blackwell) for Qwen3.5

- Repository: `sgl-project/sglang`
- PR: [19150](https://github.com/sgl-project/sglang/pull/19150)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/srt/layers/attention/linear/gdn_backend.py`
- `python/sglang/srt/layers/attention/linear/kernels/gdn_flashinfer.py`
- `python/sglang/srt/server_args.py`
- `python/sglang/test/accuracy_test_runner.py`
- `test/registered/4-gpu-models/test_qwen35_models.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-19150`
