---
id: pr-flashinfer-2908
repo: flashinfer-ai/flashinfer
pr: 2908
title: 'feat(gdn): state checkpointing in chunk_gated_delta_rule'
author: feldsherov
date: '2026-04-08'
url: https://github.com/flashinfer-ai/flashinfer/pull/2908
source_category: upstream-code
architectures:
- sm100
tags:
- gated-delta-net
- prefill
- tma
techniques: []
hardware_features:
- tma
kernel_types:
- gated-delta-net
- prefill
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 08ab45d67705b301ee66e63c6999c934c72dd41c
inclusion_reason: kernel file changes
changed_paths:
- csrc/flat_prefill_kernel_delta_rule_sm90_extern.inc
- csrc/gdn_prefill_launcher.cu
- csrc/gdn_prefill_sm90_kernel_inst.jinja
- csrc/prefill_kernel_delta_rule_sm90.cu
- flashinfer/gdn_prefill.py
- flashinfer/jit/gdn.py
- include/flashinfer/flat/hopper/collective/flat_collective_tma_warpspecialized_delta_rule.hpp
- include/flashinfer/flat/hopper/kernel/flat_options.hpp
- include/flashinfer/flat/prefill/prefill_kernel.hpp
- include/flashinfer/flat/prefill/prefill_kernel_delta_rule_sm90.cuh
- tests/gdn/test_prefill_delta_rule.py
head_ref_oid: 9db294fadb4a0ca734ef075347722ca95215874f
artifact_dir: evidence/pull-bundles/flashinfer/gh-2908
---
# feat(gdn): state checkpointing in chunk_gated_delta_rule

- Repository: `flashinfer-ai/flashinfer`
- PR: [2908](https://github.com/flashinfer-ai/flashinfer/pull/2908)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/flat_prefill_kernel_delta_rule_sm90_extern.inc`
- `csrc/gdn_prefill_launcher.cu`
- `csrc/gdn_prefill_sm90_kernel_inst.jinja`
- `csrc/prefill_kernel_delta_rule_sm90.cu`
- `flashinfer/gdn_prefill.py`
- `flashinfer/jit/gdn.py`
- `include/flashinfer/flat/hopper/collective/flat_collective_tma_warpspecialized_delta_rule.hpp`
- `include/flashinfer/flat/hopper/kernel/flat_options.hpp`
- `include/flashinfer/flat/prefill/prefill_kernel.hpp`
- `include/flashinfer/flat/prefill/prefill_kernel_delta_rule_sm90.cuh`
- `tests/gdn/test_prefill_delta_rule.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2908`
