---
id: pr-sglang-5431
repo: sgl-project/sglang
pr: 5431
title: 'BLackwell cutlass mla: Add check for bad page size/block num combinations'
author: trevor-m
date: '2025-04-15'
url: https://github.com/sgl-project/sglang/pull/5431
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- mla
techniques: []
hardware_features: []
kernel_types:
- attention
- mla
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: e8f62b20ca88ded99a013cef2a08639255ea3360
inclusion_reason: kernel file changes
changed_paths:
- sgl-kernel/python/sgl_kernel/attention.py
- sgl-kernel/tests/test_cutlass_mla.py
head_ref_oid: ec2db24ef10bf5390e6daea098b286aa7b04711a
artifact_dir: evidence/pull-bundles/sglang/gh-5431
---
# BLackwell cutlass mla: Add check for bad page size/block num combinations

- Repository: `sgl-project/sglang`
- PR: [5431](https://github.com/sgl-project/sglang/pull/5431)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `sgl-kernel/python/sgl_kernel/attention.py`
- `sgl-kernel/tests/test_cutlass_mla.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-5431`
