vllm-project/vllm

[Feature][Cleanup]: Unify `vllm.utils.flashinfer` and `vllm.model_executor.layers.quantization.utils.flashinfer_utils`

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#31414 opened on Dec 27, 2025

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 (7 comments) (0 reactions) (0 assignees)Python (80,034 stars) (16,816 forks)batch import
feature requestgood first issuehelp wanted

Description

🚀 The feature, motivation and pitch

its confusing to have both

Alternatives

No response

Additional context

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Contributor guide

Tech stack
python
Domain
backend
Issue type
refactor
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Basic Python knowledgeFamiliarity with vLLM structureUnderstanding of flashinfer
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Review the two files `vllm/utils/flashinfer.py` and `vllm/model executor/layers/quantization/utils/flashinfer utils.py`. Identify common functions and propose a unified module. Ensure all imports are updated and no functionality breaks. Consider creating a new file and deprecating the old ones.