[KERNEL][Snapdragon][4G/5G] PrimeKernel

[pascua28]

#include <std_disclaimer.h>
/*
* Your warranty is now void.
*
* I am not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed. Please
* do some research if you have any concerns about features included in this ROM/Kernel
* before flashing it! YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.
*/

Details:

• Based on latest Samsung open source drop​
• Compiled with the Clang 12 + full LTO GCC 12.2​

Instructions:

• Assuming you have a custom recovery installed, simply download and flash the kernel zip. This kernel uses Anykernel 3 so no need to reflash magisk(if you use magisk) after installing it.

Join our Telegram group to get access to early releases: https://t.me/s20fesnapdragon

Kernel source code:

https://github.com/pascua28/android_kernel_samsung_sm8250/

Did you like my work? Any support is much appreciated!
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Downloads:

Releases · pascua28/android_kernel_samsung_sm8250

Contribute to pascua28/android_kernel_samsung_sm8250 development by creating an account on GitHub.

github.com

 

[pascua28]

Changelog:
v6.1 (December 31, 2022)

• Fixed missed memory management code warnings due to recent changes in v6.0
• Fixed coding warnings for better code quality
• Enabled zero initialization for stack variables for better security and stability
• Compiled with latest GCC 12.2.1

v6.0 (December 26, 2022)

• Reverted more of CAF's memory management changes
• Disabled memcg to allow lmkd to use the more efficient PSI (pressure stall information)
• Disabled per-cgroup pressure tracking to reduce overhead
• Disabled lots of debugging from the wlan driver
• Disabled lots of logging spam
• Disabled hardened usercopy to reduce memory overhead
• Fixed incorrectly affined cpus for kgsl. This bug has been present since PrimeKernel v2.0 due to a coding mistake
• Updated source base to latest Android 13 kernel source (G781BXXU4GVK6)

v5.2 (December 4, 2022)

• Speed up pm_qos
• Imported some optimized libs
• Killed lots of logging
• Reverted CAF's messed up memory management changes
• Disabled process reclaim
• Fixed memory safety issues for various MSM drivers for better stability and security
• Disabled lots of debugging and logging from qcacld driver (this resulted in several hundred kilobytes shaved off from the kernel binary size)

v5.1-beta (November 16, 2022)

• Rewrote ashmem for clarity and performance
• Imported several optimized libraries
• Converted cpumasks to atomic to reduce expensive operations
• Selectively applied compiler optimizations to some parts of the kernel
• Use kmem_cache for some drivers to reduce (de)-/allocation
• Disabled some security suits
• Disabled SCHED_DEBUG
• Re-added MGLRU
• Compiled with GCC 12.2 with LTO enabled

Note:
If you want to squeeze a bit more performance, just rename this zip file and add -perf.
Perf variant has fewer CPU frequencies for better performance​

v5.0 (November 11, 2022)

• More stability fixes
• Lots of under-the-hood optimizations
• Fixed Google Play System update not working
• Fixed some random reboots
• Added 150MHz GPU freq
• Overall code quality fixes
• Compiled with latest GCC 12.2

v4.1 (October 21, 2022)

• More stability fixes
• Optimizations on GPU and iommu drivers
• Compiled with Clang 12 ThinLTO

v4.0 (October 6, 2022)

• Based on G781BXXS4FVF3
• Compiled with clang full LTO for better performance
• Compiled with O3
• Added MGLRU for better memory management and performance
• Code quality fixes for better stability
• Added optimized libraries for better performance
• Added kcal color control
• Removed additional logging and debugging

v3.1 (June 7, 2022)

• Based on G781BXXS4FVD9
• Reverted Linux upstream since I can't thoroughly test this kernel and for better stability
• Compiled with latest clang from clearlinux (Clang 13)
• Removed dynamic allocation from several subsystems to speed them up
• Removed more logging and debugging from several drivers on their hot code paths
• Micro-optimizations for scheduler and workqueues
• Sped-up pm qos by using atomic operations
• Tweaked cpusets for better battery life and thermals
• Improved audio driver a bit
• Affined GPU and display IRQs to big cluster for better performance
• Used optimized energy model and cpu frequencies
• Undervolted GPU a bit
• Code quality fixes for better overall stability
• Compiled with O3 optimization
• More under-the-hood optimizations

v2.0 (December 16, 2021)

• Upstreamed to Linux 4.19.219
• Converted some subsystems to use power efficient workqueues
• Removed logging from various drivers
• Removed F2FS additional tracings

v2.0-rc1 (December 1, 2021)

• Display driver optimizations
• Used BBR as default TCP congestion algorithm
• Enabled BPF_JIT to improve network performance
• Implemented optimized spinning loop
• Updated to G780GXXU3AUI3 source drop
• Speed up mremap
• Removed msm_performance CPU boosting
• Implemented optimized PM QoS for UFS
• Changed zRAM compression algorithm to lz4
• Disabled EAS_PREFER_IDLE for better power efficiency

v1.0 (Nov. 8, 2021)

• Based on Samsung G780GXXU3AUH5 source drop
• Disabled knox and Samsung security stuffs
• Changed timer tick to 100Hz for better throughput and power consumption
• Optimized GPU wakeup
• Removed use of dynamic allocation from several subsystems
• Disabled binder debugging
• Optimized UFS irq handling
• Updated lz4 compression used by zswap
• Disabled input booster

 

[pascua28]

Reserved 2

 

[pascua28]

Reserved 3

 

[Adra2a]

Nice

 

[flameteam]

this kernel supported g781u1 ?

 

[3mel]

this kernel supported g781u1 ?

it should if you can unlock your bootloader and have TWRP or root.

 

[cheloz]

¡¡¡¡Genial !!!!!
Maybe Open my bootloader .... !!!! Thanks for your time and work.. !!!

 

[snapdragon teaks]

it's a great kernel thanks for your work

 

[Ubimo]

This kernel is based on G780GXXU3AUH5.
Does this kernel also work on the G781B?
I'm on FW G781BXXS4CUJ2.

 

[bininga59]

This kernel is based on G780GXXU3AUH5.
Does this kernel also work on the G781B?
I'm on FW G781BXXS4CUJ2.

 

[pascua28]

v2.0-rc1 is up!

 

[3mel]

*performs 'happy dance'

 

[Ubimo]

v2.0-rc1 running two days on G781B, everything seems to be fine.

 

[Ubimo]

Clang 13 is available: https://releases.llvm.org/download.html

 

[HarryCustom]

Hi, after flashing a message tells me there some problems, thant I can use the phone as usual, how can I uninstall the Kernel?

 

[Rick_BR]

Hi, after flashing a message tells me there some problems, thant I can use the phone as usual, how can I uninstall the Kernel?

Download the build that you're in, extract the AP file and then, extract boot.img.lz4 from AP. Recompile the boot.img.lz4 to .tar with 7-zip, so you can flash with Odin.

 

[3mel]

if he's flashed this kernel with TWRP he can flash the extracted boot.img with TWRP (flash image).

@HarryCustom you'll need to download a command line app for LZ4 from github and figure out the command to extract the boot.img but it's not difficult.

 

[HarryCustom]

Ok thank you I'll do it!
Anyway I own a G780G/DS, I only report that to me the kernel gave problems for anyone else who wants to use it with the same phone as me!

 

[3mel]

Ok thank you I'll do it!
Anyway I own a G780G/DS, I only report that to me the kernel gave problems for anyone else who wants to use it with the same phone as me!

it's doing that for everyone, it's not a specific problem you have, everyone will get this.