---
id: pr-vllm-29352
repo: vllm-project/vllm
pr: 29352
title: '[Attention][CUDAGraph] Remove CG padding from attention backends'
author: MatthewBonanni
date: '2025-12-02'
url: https://github.com/vllm-project/vllm/pull/29352
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 1d93f116754f6e81acb9287ebcca0d1d1170a944
inclusion_reason: defer
changed_paths:
- vllm/model_executor/layers/mamba/mamba_mixer.py
- vllm/v1/attention/backends/gdn_attn.py
- vllm/v1/attention/backends/mamba1_attn.py
- vllm/v1/attention/backends/mamba2_attn.py
- vllm/v1/attention/backends/short_conv_attn.py
artifact_dir: evidence/pull-bundles/vllm/gh-29352
head_ref_oid: 08b5c7943fbfc1d98da3cd530c7f1579485b42c7
---
# [Attention][CUDAGraph] Remove CG padding from attention backends

- Repository: `vllm-project/vllm`
- PR: [29352](https://github.com/vllm-project/vllm/pull/29352)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `vllm/model_executor/layers/mamba/mamba_mixer.py`
- `vllm/v1/attention/backends/gdn_attn.py`
- `vllm/v1/attention/backends/mamba1_attn.py`
- `vllm/v1/attention/backends/mamba2_attn.py`
- `vllm/v1/attention/backends/short_conv_attn.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-29352`
