---
id: pr-flashinfer-1559
repo: flashinfer-ai/flashinfer
pr: 1559
title: 'bugfix: fix persistent attention kernel correctness on blackwell'
author: yzh119
date: '2025-08-24'
url: https://github.com/flashinfer-ai/flashinfer/pull/1559
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- persistent-kernel
techniques:
- persistent-kernel
hardware_features: []
kernel_types:
- attention
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 20e3fd19eea9210e9dd2e923dbc2202f72f65ed0
inclusion_reason: kernel file changes
changed_paths:
- include/flashinfer/attention/persistent.cuh
- scripts/task_jit_run_tests_part4.sh
- tests/jit_utils.py
- tests/test_batch_attention.py
head_ref_oid: bfce36ca545d93bac065a3204207ff93dfc1431e
artifact_dir: evidence/pull-bundles/flashinfer/gh-1559
---
# bugfix: fix persistent attention kernel correctness on blackwell

- Repository: `flashinfer-ai/flashinfer`
- PR: [1559](https://github.com/flashinfer-ai/flashinfer/pull/1559)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `include/flashinfer/attention/persistent.cuh`
- `scripts/task_jit_run_tests_part4.sh`
- `tests/jit_utils.py`
- `tests/test_batch_attention.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1559`
