---
id: pr-flashinfer-1116
repo: flashinfer-ai/flashinfer
pr: 1116
title: 'hotfix: fix the blackwell fmha stream'
author: yzh119
date: '2025-06-06'
url: https://github.com/flashinfer-ai/flashinfer/pull/1116
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- flash-attention
techniques: []
hardware_features: []
kernel_types:
- attention
- flash-attention
languages:
- cuda-cpp
captured_at: '2026-04-17'
status: merged
merge_sha: ef8c054f7ab8091d4d1b1acb0ec8a7b4e79dab92
inclusion_reason: kernel file changes
changed_paths:
- csrc/fmha_cutlass_sm100.cu
- include/flashinfer/attention/blackwell/fmha_cutlass_sm100.cuh
- tests/conftest.py
- tests/test_blackwell_fmha.py
head_ref_oid: fbc3bc2050a7d35002a698bccc8b02fa938553b2
artifact_dir: evidence/pull-bundles/flashinfer/gh-1116
---
# hotfix: fix the blackwell fmha stream

- Repository: `flashinfer-ai/flashinfer`
- PR: [1116](https://github.com/flashinfer-ai/flashinfer/pull/1116)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/fmha_cutlass_sm100.cu`
- `include/flashinfer/attention/blackwell/fmha_cutlass_sm100.cuh`
- `tests/conftest.py`
- `tests/test_blackwell_fmha.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1116`
