---
id: pr-sglang-16034
repo: sgl-project/sglang
pr: 16034
title: Support fa4 decoding
author: Qiaolin-Yu
date: '2026-01-21'
url: https://github.com/sgl-project/sglang/pull/16034
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 4f6f5d25c801d8bf8cea49c33f95866939fe1a2c
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/layers/attention/flashattention_backend.py
- python/sglang/srt/server_args.py
head_ref_oid: 2724cd321d8f7b0efede039e6101ccfbb80b5fb3
artifact_dir: evidence/pull-bundles/sglang/gh-16034
---
# Support fa4 decoding

- Repository: `sgl-project/sglang`
- PR: [16034](https://github.com/sgl-project/sglang/pull/16034)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/srt/layers/attention/flashattention_backend.py`
- `python/sglang/srt/server_args.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-16034`
