---
id: pr-sglang-21783
repo: sgl-project/sglang
pr: 21783
title: '[DSA] Support trtllm sparse mla kernel for prefill batches '
author: Fridge003
date: '2026-04-01'
url: https://github.com/sgl-project/sglang/pull/21783
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- mla
- prefill
techniques: []
hardware_features: []
kernel_types:
- attention
- mla
- prefill
languages:
- python
captured_at: '2026-04-17'
status: merged
merge_sha: 5e12c4e08ec3bd74972a938513f763a0cb10769e
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/layers/attention/nsa_backend.py
- python/sglang/srt/server_args.py
- python/sglang/test/run_eval.py
head_ref_oid: 9505e671765f1c5078b338220dc8ac5aa2a83e9f
artifact_dir: evidence/pull-bundles/sglang/gh-21783
---
# [DSA] Support trtllm sparse mla kernel for prefill batches 

- Repository: `sgl-project/sglang`
- PR: [21783](https://github.com/sgl-project/sglang/pull/21783)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/srt/layers/attention/nsa_backend.py`
- `python/sglang/srt/server_args.py`
- `python/sglang/test/run_eval.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-21783`
