---
id: pr-flashinfer-2536
repo: flashinfer-ai/flashinfer
pr: 2536
title: fallback to fa2 (instead of fa3) for unsupported configuration (bf16 Q, Fp8 KV)
author: saltyminty
date: '2026-02-12'
url: https://github.com/flashinfer-ai/flashinfer/pull/2536
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- fp8
techniques: []
hardware_features:
- fp8
kernel_types: []
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 8316a3f8d41ebfac356f3641d4d8d25c62485702
inclusion_reason: semantic match with file changes
changed_paths:
- flashinfer/utils.py
head_ref_oid: fa9500418649b101b6f26c5c52999dd4218c34a3
artifact_dir: evidence/pull-bundles/flashinfer/gh-2536
---
# fallback to fa2 (instead of fa3) for unsupported configuration (bf16 Q, Fp8 KV)

- Repository: `flashinfer-ai/flashinfer`
- PR: [2536](https://github.com/flashinfer-ai/flashinfer/pull/2536)
- Decision: `semantic match with file changes`
- Reason: semantic match with file changes

## Changed Paths

- `flashinfer/utils.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2536`
