---
id: pr-vllm-27994
repo: vllm-project/vllm
pr: 27994
title: '[FlashInfer] Avoid FlashInfer block_size 16 + head_size 256 on blackwell'
author: heheda12345
date: '2025-11-05'
url: https://github.com/vllm-project/vllm/pull/27994
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: c765f0b443c2de886a5771efcbc154ee84c2c19d
inclusion_reason: kernel file changes
changed_paths:
- vllm/model_executor/models/config.py
- vllm/v1/attention/backends/flashinfer.py
head_ref_oid: c3eea3d127b8197ff72639ca5e78523a9e28a9c0
artifact_dir: evidence/pull-bundles/vllm/gh-27994
---
# [FlashInfer] Avoid FlashInfer block_size 16 + head_size 256 on blackwell

- Repository: `vllm-project/vllm`
- PR: [27994](https://github.com/vllm-project/vllm/pull/27994)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/model_executor/models/config.py`
- `vllm/v1/attention/backends/flashinfer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-27994`
