---
id: pr-sglang-5390
repo: sgl-project/sglang
pr: 5390
title: Add Cutlass MLA attention backend
author: trevor-m
date: '2025-04-28'
url: https://github.com/sgl-project/sglang/pull/5390
source_category: upstream-code
architectures:
- sm100
tags:
- tcgen05
- mla
- moe
- attention
techniques:
- warp-specialization
- persistent-kernel
- tile-scheduling
hardware_features:
- tcgen05
- tmem
- tma
kernel_types:
- mla
- attention
- decode
- moe
languages:
- cuda-cpp
- python
captured_at: 2026-04-16
status: merged
merge_sha: 84810da4ae424d15ec06a3e32a03a839dd50a644
inclusion_reason: manually curated, Blackwell kernel relevance
changed_paths:
- docs/backend/server_arguments.md
- python/sglang/srt/layers/attention/cutlass_mla_backend.py
- python/sglang/srt/layers/attention/utils.py
- python/sglang/srt/managers/schedule_batch.py
- python/sglang/srt/model_executor/model_runner.py
- python/sglang/srt/server_args.py
- sgl-kernel/python/sgl_kernel/attention.py
head_ref_oid: d086af2cf9ca00d282fef492e6cbb9f9d3cd1a7d
artifact_dir: evidence/pull-bundles/sglang/gh-5390
---
# Add Cutlass MLA attention backend

- Repository: `sgl-project/sglang`
- PR: [5390](https://github.com/sgl-project/sglang/pull/5390)
- Decision: `manually curated, Blackwell kernel relevance`
- Reason: manually curated, Blackwell kernel relevance

## Changed Paths

- `docs/backend/server_arguments.md`
- `python/sglang/srt/layers/attention/cutlass_mla_backend.py`
- `python/sglang/srt/layers/attention/utils.py`
- `python/sglang/srt/managers/schedule_batch.py`
- `python/sglang/srt/model_executor/model_runner.py`
- `python/sglang/srt/server_args.py`
- `sgl-kernel/python/sgl_kernel/attention.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-5390`
