---
id: pr-vllm-38730
repo: vllm-project/vllm
pr: 38730
title: '[Bugfix] Restrict TRTLLM attention to SM100, fixing GB300 (SM103) hang'
author: stecasta
date: '2026-04-01'
url: https://github.com/vllm-project/vllm/pull/38730
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: 6183cae1bd8db73ee579f6424382975b17d02fb0
inclusion_reason: kernel file changes
changed_paths:
- docs/design/attention_backends.md
- tools/pre_commit/generate_attention_backend_docs.py
- vllm/utils/flashinfer.py
head_ref_oid: 30d61218c7746cad033ff0925945509df2513729
artifact_dir: evidence/pull-bundles/vllm/gh-38730
---
# [Bugfix] Restrict TRTLLM attention to SM100, fixing GB300 (SM103) hang

- Repository: `vllm-project/vllm`
- PR: [38730](https://github.com/vllm-project/vllm/pull/38730)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `docs/design/attention_backends.md`
- `tools/pre_commit/generate_attention_backend_docs.py`
- `vllm/utils/flashinfer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-38730`
