---
id: pr-sglang-18442
repo: sgl-project/sglang
pr: 18442
title: 'feat: add FA4 SM90 paged KV decode support & update attention docs'
author: zwang86
date: '2026-03-02'
url: https://github.com/sgl-project/sglang/pull/18442
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- attention
- decode
- flash-attention
techniques: []
hardware_features: []
kernel_types:
- attention
- decode
- flash-attention
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: f51ddba131c65962cadc770b57eb7115a14df5c0
inclusion_reason: kernel file changes
changed_paths:
- docs/advanced_features/attention_backend.md
- python/sglang/jit_kernel/flash_attention/cute/flash_fwd.py
- python/sglang/jit_kernel/flash_attention/cute/interface.py
- python/sglang/srt/server_args.py
head_ref_oid: 1c7fe04bd39d4db0f90d287578659d562f79dc71
artifact_dir: evidence/pull-bundles/sglang/gh-18442
---
# feat: add FA4 SM90 paged KV decode support & update attention docs

- Repository: `sgl-project/sglang`
- PR: [18442](https://github.com/sgl-project/sglang/pull/18442)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `docs/advanced_features/attention_backend.md`
- `python/sglang/jit_kernel/flash_attention/cute/flash_fwd.py`
- `python/sglang/jit_kernel/flash_attention/cute/interface.py`
- `python/sglang/srt/server_args.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-18442`
