---
id: pr-flash-attention-cutlass-12
repo: dcutoolkit/deeplearing/flash-attention-cutlass
pr: 12
title: Merge branch 'master-dev' into 'vllm_flash_attn'
author: zhanghj2
date: '2025-06-21'
url: http://42.228.13.241:10068/dcutoolkit/deeplearing/flash-attention-cutlass/-/merge_requests/12
source_category: upstream-code
architectures:
- dcu
- gfx928
- gfx936
- gfx938
tags:
- attention
- cutlass
- dcu
- flash-attention
- hip
- rocm
- softmax
techniques:
- build-system
hardware_features: []
kernel_types:
- attention
- softmax
languages:
- cpp
- cuda-cpp
- hip
- python
captured_at: '2026-05-19T07:28:38.621971+00:00'
status: open
merge_sha: d9811c8596829f0d5d6ba7fc0c5f665da3e795a0
inclusion_reason: Use as LightOp/DCU upstream MR evidence; web/API MR state was unavailable, so validate portability against local LightOp before reuse.
changed_paths:
- csrc/flash_attn/flash_api.cpp
- csrc/flash_attn/src/flash.h
- csrc/flash_attn/src/flash_fwd_kernel.h
- csrc/flash_attn/src/flash_fwd_launch_template.h
- csrc/flash_attn/src/kernel_traits.h
- csrc/flash_attn/src/paged_attention.cu
- csrc/flash_attn/src/softmax.h
- csrc/flash_attn/src/utils.h
- flash_attn/__init__.py
- flash_attn/flash_attn_interface.py
- setup.py
artifact_dir: evidence/pull-bundles/flash-attention-cutlass/mr-12
---
# Merge branch 'master-dev' into 'vllm_flash_attn'

- Repository: `dcutoolkit/deeplearing/flash-attention-cutlass`
- MR: [12](http://42.228.13.241:10068/dcutoolkit/deeplearing/flash-attention-cutlass/-/merge_requests/12)
- Decision: `include`
- Reason: Use as LightOp/DCU upstream MR evidence; web/API MR state was unavailable, so validate portability against local LightOp before reuse.

## Changed Paths

- `csrc/flash_attn/flash_api.cpp`
- `csrc/flash_attn/src/flash.h`
- `csrc/flash_attn/src/flash_fwd_kernel.h`
- `csrc/flash_attn/src/flash_fwd_launch_template.h`
- `csrc/flash_attn/src/kernel_traits.h`
- `csrc/flash_attn/src/paged_attention.cu`
- `csrc/flash_attn/src/softmax.h`
- `csrc/flash_attn/src/utils.h`
- `flash_attn/__init__.py`
- `flash_attn/flash_attn_interface.py`
- `setup.py`

## Artifact Bundle

`evidence/pull-bundles/flash-attention-cutlass/mr-12`
