---
id: pr-sglang-12788
repo: sgl-project/sglang
pr: 12788
title: '[DeepSeek-V3.2][NSA] Enable MHA Pathway for Short Sequence Prefill on B200 (SM100)'
author: YAMY1234
date: '2025-11-07'
url: https://github.com/sgl-project/sglang/pull/12788
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- attention
- prefill
techniques: []
hardware_features: []
kernel_types:
- attention
- prefill
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 7257525ccea633ae5578f37658b86f5438f6db9c
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/layers/attention/nsa_backend.py
- python/sglang/srt/models/deepseek_v2.py
head_ref_oid: e4490907da45af9a6a625a02f3d9a87e171df6cc
artifact_dir: evidence/pull-bundles/sglang/gh-12788
---
# [DeepSeek-V3.2][NSA] Enable MHA Pathway for Short Sequence Prefill on B200 (SM100)

- Repository: `sgl-project/sglang`
- PR: [12788](https://github.com/sgl-project/sglang/pull/12788)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/srt/layers/attention/nsa_backend.py`
- `python/sglang/srt/models/deepseek_v2.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-12788`
