---
id: pr-sglang-21906
repo: sgl-project/sglang
pr: 21906
title: '[Bugfix] Temporarily skip TRTLLM attention on (G)B300 (SM103) to avoid high-concurrency hang'
author: mmangkad
date: '2026-04-03'
url: https://github.com/sgl-project/sglang/pull/21906
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- python
captured_at: '2026-04-17'
status: merged
merge_sha: 8cb337c8ea48357bb1a404e99b93813089ed64ba
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/layers/attention/nsa_backend.py
- python/sglang/srt/server_args.py
- python/sglang/srt/utils/common.py
head_ref_oid: 7c5a5abaeb7911e2124c9b876415fec73d85e2ef
artifact_dir: evidence/pull-bundles/sglang/gh-21906
---
# [Bugfix] Temporarily skip TRTLLM attention on (G)B300 (SM103) to avoid high-concurrency hang

- Repository: `sgl-project/sglang`
- PR: [21906](https://github.com/sgl-project/sglang/pull/21906)
- 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/srt/utils/common.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-21906`
