---
id: pr-sglang-23699
repo: sgl-project/sglang
pr: 23699
title: '[NSA] Fall back to fast_hadamard_transform when sgl_kernel lacks the symbol'
author: Fridge003
date: '2026-04-25'
url: https://github.com/sgl-project/sglang/pull/23699
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 4bf81c988a3c6e24e08db1be02c10e14c9ded4f9
inclusion_reason: defer
changed_paths:
- python/sglang/srt/layers/attention/nsa/nsa_indexer.py
artifact_dir: evidence/pull-bundles/sglang/gh-23699
head_ref_oid: 1e53180c26f744a658161c6538cf311dec192c85
---
# [NSA] Fall back to fast_hadamard_transform when sgl_kernel lacks the symbol

- Repository: `sgl-project/sglang`
- PR: [23699](https://github.com/sgl-project/sglang/pull/23699)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `python/sglang/srt/layers/attention/nsa/nsa_indexer.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-23699`
