---
id: pr-vllm-22378
repo: vllm-project/vllm
pr: 22378
title: Fix trtllm-gen attention env and add attention sink
author: IwakuraRein
date: '2025-08-07'
url: https://github.com/vllm-project/vllm/pull/22378
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 9a3835aaa9006c0d53628f278319642774d88fbe
inclusion_reason: defer
changed_paths:
- vllm/envs.py
- vllm/model_executor/models/gpt_oss.py
- vllm/utils/flashinfer.py
- vllm/v1/attention/backends/flashinfer.py
- vllm/v1/attention/backends/utils.py
artifact_dir: evidence/pull-bundles/vllm/gh-22378
head_ref_oid: e9919bdc3129e2767ca7640da5fae9e7eab1db7a
---
# Fix trtllm-gen attention env and add attention sink

- Repository: `vllm-project/vllm`
- PR: [22378](https://github.com/vllm-project/vllm/pull/22378)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `vllm/envs.py`
- `vllm/model_executor/models/gpt_oss.py`
- `vllm/utils/flashinfer.py`
- `vllm/v1/attention/backends/flashinfer.py`
- `vllm/v1/attention/backends/utils.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-22378`
