---
id: pr-sglang-20399
repo: sgl-project/sglang
pr: 20399
title: '[AMD][Bug-fix] Fix gpu fault when run the test with dp-attention-enabled and max-concurrency is over 256'
author: kkHuang-amd
date: '2026-03-12'
url: https://github.com/sgl-project/sglang/pull/20399
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- python
captured_at: '2026-04-17'
status: merged
merge_sha: 318a40fdfb7f732b581bd119df4ffba4cc19f298
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/layers/attention/aiter_backend.py
head_ref_oid: a8f28cbb6a33cb7835cbfbb98666731e825ec8fa
artifact_dir: evidence/pull-bundles/sglang/gh-20399
---
# [AMD][Bug-fix] Fix gpu fault when run the test with dp-attention-enabled and max-concurrency is over 256

- Repository: `sgl-project/sglang`
- PR: [20399](https://github.com/sgl-project/sglang/pull/20399)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/srt/layers/attention/aiter_backend.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-20399`
