---
id: pr-vllm-26534
repo: vllm-project/vllm
pr: 26534
title: Move query quantization to attention layer for Flashinfer & Triton.
author: adabeyta
date: '2025-10-15'
url: https://github.com/vllm-project/vllm/pull/26534
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- kernel-fusion
- quantization
techniques:
- kernel-fusion
hardware_features: []
kernel_types:
- attention
- quantization
languages:
- triton
captured_at: '2026-04-27'
status: merged
merge_sha: 0a9ef0cfce131300fea219952b6e85c8dee45578
inclusion_reason: kernel file changes
changed_paths:
- tests/compile/test_fusion_attn.py
- vllm/attention/backends/abstract.py
- vllm/attention/layer.py
- vllm/v1/attention/backends/flash_attn.py
- vllm/v1/attention/backends/flashinfer.py
- vllm/v1/attention/backends/triton_attn.py
head_ref_oid: c3a92007a55efd87eb3e7c1aea66fe8c042b9a71
artifact_dir: evidence/pull-bundles/vllm/gh-26534
---
# Move query quantization to attention layer for Flashinfer & Triton.

- Repository: `vllm-project/vllm`
- PR: [26534](https://github.com/vllm-project/vllm/pull/26534)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/compile/test_fusion_attn.py`
- `vllm/attention/backends/abstract.py`
- `vllm/attention/layer.py`
- `vllm/v1/attention/backends/flash_attn.py`
- `vllm/v1/attention/backends/flashinfer.py`
- `vllm/v1/attention/backends/triton_attn.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-26534`
