---
id: pr-flashinfer-1508
repo: flashinfer-ai/flashinfer
pr: 1508
title: Support cuda<12.8 built for trtllm_allreduce_fusion.
author: strgrb
date: '2025-08-18'
url: https://github.com/flashinfer-ai/flashinfer/pull/1508
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features: []
kernel_types:
- moe
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 4c1ac5f61e0f9bf15ea3c67aae23621aa9b102c3
inclusion_reason: kernel file changes
changed_paths:
- include/flashinfer/comm/trtllm_allreduce_fusion.cuh
- include/flashinfer/comm/trtllm_moe_allreduce_fusion.cuh
head_ref_oid: af26d72afac5b5fc7a7a5182981a1345e652adfe
artifact_dir: evidence/pull-bundles/flashinfer/gh-1508
---
# Support cuda<12.8 built for trtllm_allreduce_fusion.

- Repository: `flashinfer-ai/flashinfer`
- PR: [1508](https://github.com/flashinfer-ai/flashinfer/pull/1508)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `include/flashinfer/comm/trtllm_allreduce_fusion.cuh`
- `include/flashinfer/comm/trtllm_moe_allreduce_fusion.cuh`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1508`
