---
id: pr-vllm-29845
repo: vllm-project/vllm
pr: 29845
title: '[SpecDecode] Simplified alternative padded-speculation acceptance rate fix'
author: LucasWilkinson
date: '2025-12-22'
url: https://github.com/vllm-project/vllm/pull/29845
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- mla
techniques: []
hardware_features: []
kernel_types:
- attention
- decode
- mla
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: de71747655668d268998264365dc9bbc8e58d410
inclusion_reason: kernel file changes
changed_paths:
- tests/v1/spec_decode/test_eagle.py
- vllm/v1/attention/backends/mla/common.py
- vllm/v1/attention/backends/mla/flashattn_mla.py
- vllm/v1/attention/backends/mla/flashmla.py
- vllm/v1/attention/backends/mla/rocm_aiter_mla.py
- vllm/v1/spec_decode/eagle.py
- vllm/v1/spec_decode/utils.py
- vllm/v1/worker/gpu_model_runner.py
head_ref_oid: d288e5d5a875cbd702227233203ce6eb75bf4f25
artifact_dir: evidence/pull-bundles/vllm/gh-29845
---
# [SpecDecode] Simplified alternative padded-speculation acceptance rate fix

- Repository: `vllm-project/vllm`
- PR: [29845](https://github.com/vllm-project/vllm/pull/29845)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/v1/spec_decode/test_eagle.py`
- `vllm/v1/attention/backends/mla/common.py`
- `vllm/v1/attention/backends/mla/flashattn_mla.py`
- `vllm/v1/attention/backends/mla/flashmla.py`
- `vllm/v1/attention/backends/mla/rocm_aiter_mla.py`
- `vllm/v1/spec_decode/eagle.py`
- `vllm/v1/spec_decode/utils.py`
- `vllm/v1/worker/gpu_model_runner.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-29845`
