---
id: pr-vllm-38794
repo: vllm-project/vllm
pr: 38794
title: '[Perf] Reduce H2D pageable memory copies'
author: jackcfwang
date: '2026-04-10'
url: https://github.com/vllm-project/vllm/pull/38794
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- triton
captured_at: '2026-04-17'
status: merged
merge_sha: 49d20346e411099a09acd55031b4f1a507bad99c
inclusion_reason: kernel file changes
changed_paths:
- vllm/v1/attention/backends/triton_attn.py
- vllm/v1/worker/gpu_model_runner.py
artifact_dir: evidence/pull-bundles/vllm/gh-38794
head_ref_oid: b2091701a49a44144ed1b82500147d9979705dda
---
# [Perf] Reduce H2D pageable memory copies

- Repository: `vllm-project/vllm`
- PR: [38794](https://github.com/vllm-project/vllm/pull/38794)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/v1/attention/backends/triton_attn.py`
- `vllm/v1/worker/gpu_model_runner.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-38794`
