---
id: pr-vllm-34791
repo: vllm-project/vllm
pr: 34791
title: '[Bugfix] Gate 256-bit instructions to CUDA 12.9+'
author: huydhn
date: '2026-02-21'
url: https://github.com/vllm-project/vllm/pull/34791
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- gemm
techniques: []
hardware_features: []
kernel_types: []
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 272b535ab3315a2ed3cd1a5e9803df2b86da4f07
inclusion_reason: kernel file changes
changed_paths:
- csrc/activation_kernels.cu
head_ref_oid: 26328192c31901192b8694175a81f1bdc11edd96
artifact_dir: evidence/pull-bundles/vllm/gh-34791
---
# [Bugfix] Gate 256-bit instructions to CUDA 12.9+

- Repository: `vllm-project/vllm`
- PR: [34791](https://github.com/vllm-project/vllm/pull/34791)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/activation_kernels.cu`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-34791`
