---
id: pr-sglang-11606
repo: sgl-project/sglang
pr: 11606
title: '[NVIDIA] FA3/FA4 Fix '
author: johnnynunez
date: '2025-10-20'
url: https://github.com/sgl-project/sglang/pull/11606
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- flash-attention
techniques: []
hardware_features: []
kernel_types:
- attention
- flash-attention
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 252dc4e112a6ba6a20c2ccb743171f0e8a81c0fb
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/server_args.py
- python/sglang/test/test_utils.py
- sgl-kernel/CMakeLists.txt
- sgl-kernel/csrc/flash_extension.cc
- sgl-kernel/include/sgl_flash_kernel_ops.h
- sgl-kernel/python/sgl_kernel/_fa4_interface.py
- sgl-kernel/python/sgl_kernel/flash_attn.py
- sgl-kernel/tests/test_flash_attention_4.py
- test/srt/run_suite.py
- test/srt/test_flash_attention_4.py
head_ref_oid: bf9e1a2e1ed3e4cd7926706ceaed97339fccd951
artifact_dir: evidence/pull-bundles/sglang/gh-11606
---
# [NVIDIA] FA3/FA4 Fix 

- Repository: `sgl-project/sglang`
- PR: [11606](https://github.com/sgl-project/sglang/pull/11606)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/srt/server_args.py`
- `python/sglang/test/test_utils.py`
- `sgl-kernel/CMakeLists.txt`
- `sgl-kernel/csrc/flash_extension.cc`
- `sgl-kernel/include/sgl_flash_kernel_ops.h`
- `sgl-kernel/python/sgl_kernel/_fa4_interface.py`
- `sgl-kernel/python/sgl_kernel/flash_attn.py`
- `sgl-kernel/tests/test_flash_attention_4.py`
- `test/srt/run_suite.py`
- `test/srt/test_flash_attention_4.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-11606`
