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Optimistic Kernel - Clang 22 & Sync Upstream & Major Fix - 20251217

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@etnperlong etnperlong released this 18 Dec 11:17
20251217
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etnperlong Mike Evans
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Learn about vigilant mode.

Introduction

This is a custom kernel based on the excellent no-frills Sultan Kernel developed by @Sultanxda

The philosophy remains the same: to be a simple, stable replacement for the stock kernel that brings several under-the-hood enhancements for performance and battery life.

Kernel Features

This port carries over the core features from the original Sultan Kernel. For a detailed list of features and improvements, please refer to the >> original thread <<.

  • Compiled by the latest Google Prebuilt Clang 22.0.0 (based on r584948) from build 14488419 with Link Time Optimisation (LTO).
  • Merged with the latest Android Common Kernel 6.1.157
  • Keep Capacity Aware Superset Scheduler (CASS), Tensor AIO from Sultan
  • Improved RAM management: disable SLMK, bring back MGLRU, PSI and MEMCG
  • CPU & I/O Optimizations: Tuned the classic ondemand and conservative governors to improve power efficiency and optimized the default mq-deadline parameters (Thanks to Xanmod)
  • Updated the latest zstd & lz crypto algorithms
  • Updated Google BBR v3 congestion control algorithm and enabled it by default to enhance network throughput.
  • (Root Variant) Add support for both official KernelSU 3.0 & Sukisu Ultra

Compatibility

Tested on Google Pixel 9a (tegu) running in Android 16.0.0 QPR2 (BP4A.251205.006, December 2025)

Build Variants

  • Standard: A clean build with no integrated root solution.
  • Root: SusFS V2.0.0 built in with different Root Manager
    • Official KernelSU 3.0.0
    • Sukisu Ultra

Installation

It is recommended to flash the AnyKernel3 zip with the forked Kernel Flasher app from fatalcoder524.

Credits & Thanks

A huge thank you goes to the original developers and contributors. This port would not be possible without them.

  • Sultan Alsawaf: For the original kernel and his incredible work for the community.
  • WildKernels: For providing the build scripts and patches.
  • osm0sis: For the AnyKernel3 flashing script.

Changelogs

17/12/2025

  • Fixed random reboots occurring on the first screen during startup
  • Sync source code from android14-6.1
  • Built using the modern AOSP Clang 22 version

16/12/2025

  • Sync source code from android14-6.1-2025-12
  • (Sukisu Variant) Sync with SuSFS v2.0.0 builtin inline hook

11/09/2025

  • Updated source codes for the September Security Patch from Google
  • Rebranded to Optimistic
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