---
id: pr-sglang-3967
repo: sgl-project/sglang
pr: 3967
title: '[Feature]Support ragged prefill in flashinfer mla backend'
author: Fridge003
date: '2025-03-01'
url: https://github.com/sgl-project/sglang/pull/3967
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 90a4b7d98a5c2d7b9d3dcc7dad6809a6d3d9ca8f
inclusion_reason: defer
changed_paths:
- docs/backend/server_arguments.md
- python/sglang/srt/layers/attention/flashinfer_backend.py
- python/sglang/srt/layers/attention/flashinfer_mla_backend.py
- python/sglang/srt/managers/schedule_batch.py
- python/sglang/srt/model_executor/model_runner.py
- python/sglang/srt/models/deepseek_v2.py
- python/sglang/srt/server_args.py
- test/srt/run_suite.py
- test/srt/test_mla_flashinfer.py
artifact_dir: evidence/pull-bundles/sglang/gh-3967
head_ref_oid: 1fc606ff4d5025117dd19237ffaeb0ddfd6802d2
---
# [Feature]Support ragged prefill in flashinfer mla backend

- Repository: `sgl-project/sglang`
- PR: [3967](https://github.com/sgl-project/sglang/pull/3967)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `docs/backend/server_arguments.md`
- `python/sglang/srt/layers/attention/flashinfer_backend.py`
- `python/sglang/srt/layers/attention/flashinfer_mla_backend.py`
- `python/sglang/srt/managers/schedule_batch.py`
- `python/sglang/srt/model_executor/model_runner.py`
- `python/sglang/srt/models/deepseek_v2.py`
- `python/sglang/srt/server_args.py`
- `test/srt/run_suite.py`
- `test/srt/test_mla_flashinfer.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-3967`
