---
id: pr-vllm-12959
repo: vllm-project/vllm
pr: 12959
title: '[bugfix] fix early import of flash attention'
author: youkaichao
date: '2025-02-08'
url: https://github.com/vllm-project/vllm/pull/12959
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: fe743b798dfa56aea3e2cb7182365ba3495489ee
inclusion_reason: defer
changed_paths:
- vllm/attention/backends/flash_attn.py
- vllm/attention/backends/mla/utils.py
- vllm/attention/backends/utils.py
- vllm/v1/attention/backends/flash_attn.py
artifact_dir: evidence/pull-bundles/vllm/gh-12959
head_ref_oid: 8bcf88434e56f947643cd1fa2ac333be72ff88a9
---
# [bugfix] fix early import of flash attention

- Repository: `vllm-project/vllm`
- PR: [12959](https://github.com/vllm-project/vllm/pull/12959)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `vllm/attention/backends/flash_attn.py`
- `vllm/attention/backends/mla/utils.py`
- `vllm/attention/backends/utils.py`
- `vllm/v1/attention/backends/flash_attn.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-12959`
