vllm-project/vllm

[Feature]: Use kernel abstraction for fp4 scaled mm

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#31,823 opened on Jan 6, 2026

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 (12 comments) (0 reactions) (1 assignee)Python (16,816 forks)batch import
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Description

🚀 The feature, motivation and pitch

See MPLinearKernel and ScaledMMLinearKernel.

Alternatives

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Contributor guide

Research direction
Examine the existing MPLinearKernel and ScaledMMLinearKernel classes to understand the current kernel dispatch pattern. Then design a common abstraction that encapsulates all kernel variants, ensuring it integrates with the existing codebase without breaking current functionality.
Tech stack
python
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
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
PythonGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30