---
id: pr-vllm-22735
repo: vllm-project/vllm
pr: 22735
title: '[Kernel] Simplify `get_kv_cache_layout` and cache `use_trtllm_attention` env-dependent bit'
author: NickLucche
date: '2025-08-16'
url: https://github.com/vllm-project/vllm/pull/22735
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 070da660c1bf9e7a7be8b9efeff4b06f91c7342f
inclusion_reason: defer
changed_paths:
- vllm/utils/flashinfer.py
- vllm/v1/attention/backends/utils.py
artifact_dir: evidence/pull-bundles/vllm/gh-22735
head_ref_oid: 8dd76b85c4bb820487de28580e90e21b72917d0f
---
# [Kernel] Simplify `get_kv_cache_layout` and cache `use_trtllm_attention` env-dependent bit

- Repository: `vllm-project/vllm`
- PR: [22735](https://github.com/vllm-project/vllm/pull/22735)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `vllm/utils/flashinfer.py`
- `vllm/v1/attention/backends/utils.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-22735`
