---
id: pr-sglang-19935
repo: sgl-project/sglang
pr: 19935
title: '[AMD] Fix FP8 assertion failure in aiter MLA decode by falling back to self.k_scale'
author: yichiche
date: '2026-03-12'
url: https://github.com/sgl-project/sglang/pull/19935
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- fp4
- fp8
- mla
techniques: []
hardware_features:
- fp4
- fp8
kernel_types:
- attention
- decode
- mla
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 1e2983c98ebd53c60df3581cc31627d75f24b811
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/layers/attention/aiter_backend.py
- test/registered/amd/accuracy/mi35x/test_kimi_k25_aiter_mla_eval_mi35x.py
- test/registered/amd/accuracy/mi35x/test_kimi_k25_mxfp4_eval_mi35x.py
- test/registered/amd/test_kimi_k25_mxfp4.py
head_ref_oid: cc472a3daf8c381679c57c7104e7947138ba1cb3
artifact_dir: evidence/pull-bundles/sglang/gh-19935
---
# [AMD] Fix FP8 assertion failure in aiter MLA decode by falling back to self.k_scale

- Repository: `sgl-project/sglang`
- PR: [19935](https://github.com/sgl-project/sglang/pull/19935)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/srt/layers/attention/aiter_backend.py`
- `test/registered/amd/accuracy/mi35x/test_kimi_k25_aiter_mla_eval_mi35x.py`
- `test/registered/amd/accuracy/mi35x/test_kimi_k25_mxfp4_eval_mi35x.py`
- `test/registered/amd/test_kimi_k25_mxfp4.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-19935`
