---
id: pr-vllm-23046
repo: vllm-project/vllm
pr: 23046
title: '[V1] address post issues related to #20059 (part 1); cascade attention reenable by default'
author: fhl2000
date: '2025-09-26'
url: https://github.com/vllm-project/vllm/pull/23046
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: f075693da767a8246274219c284ef687c4fcaf51
inclusion_reason: kernel file changes
changed_paths:
- tests/compile/piecewise/test_full_cudagraph.py
- tests/compile/test_config.py
- tests/v1/attention/utils.py
- tests/v1/cudagraph/test_cudagraph_dispatch.py
- tests/v1/cudagraph/test_cudagraph_mode.py
- vllm/compilation/backends.py
- vllm/compilation/decorators.py
- vllm/compilation/piecewise_backend.py
- vllm/config/__init__.py
- vllm/config/compilation.py
- vllm/forward_context.py
- vllm/v1/cudagraph_dispatcher.py
- vllm/v1/worker/gpu_model_runner.py
head_ref_oid: 891723ac0e13bfc756f1dc350006d495b8172655
artifact_dir: evidence/pull-bundles/vllm/gh-23046
---
# [V1] address post issues related to #20059 (part 1); cascade attention reenable by default

- Repository: `vllm-project/vllm`
- PR: [23046](https://github.com/vllm-project/vllm/pull/23046)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/compile/piecewise/test_full_cudagraph.py`
- `tests/compile/test_config.py`
- `tests/v1/attention/utils.py`
- `tests/v1/cudagraph/test_cudagraph_dispatch.py`
- `tests/v1/cudagraph/test_cudagraph_mode.py`
- `vllm/compilation/backends.py`
- `vllm/compilation/decorators.py`
- `vllm/compilation/piecewise_backend.py`
- `vllm/config/__init__.py`
- `vllm/config/compilation.py`
- `vllm/forward_context.py`
- `vllm/v1/cudagraph_dispatcher.py`
- `vllm/v1/worker/gpu_model_runner.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-23046`
