arter97 kernel for Galaxy S4 LTE-A
/* Features */
Based on stock GT-I9506 kernel source
Supports AOSP and Touchwiz
Upgraded to the latest Linux
Compiled using latest ARM Linaro-toolchain with optimization options
Speed improvements
New CPU Governors
New I/O Schedulers
Color inverting by quadriple tapping on home button
/* Details */
Upgraded to the latest Linux 3.4.109
Kernel & ramdisk compression in LZO format
Kernel scheduler improvements
Full unaligned access enabled
Improved memcpy, hrtimer, mutex, cpufreq, memory-management, writeback
Optimized RWSEM, crypto, math drivers
Wi-Fi wakelock reduced
BFQ v7r8, SIO, FIOPS, FIFO, VR, ZEN I/O Schedulers added
Deadline I/O Scheduler speed improved
Asynchronous fsync from hTC ported by faux123
Dynamic fsync from faux123
Networking speed improvements
Disabled MMC-CRC for better speed
ARCH_POWER enabled for better power savings
Replaced MP-Decision with Intelli_plug
Fauxsound from faux123
Random driver backported from Linux 4.0+
SCHED_AUTOGROUP enabled for best multitasking experience
Bic as default TCP congestion control for best networking speed
i2c clock rates adjusted to 19.2 MHz for better battery life
Built with LTO(Link-Time-Optimizations) to provide optimum performance
Power-efficient workqueues from Linaro
Uses Samsung's sdcardfs replacing Google's FUSE daemon for better battery and performance
SELinux set to permissive
Compiler optimizations for Krait architecture
Fully ready for AOSP Android 5.0 Lollipop
Proper, full support for f2fs & backported from Linux 4.3+
Kernel-side trimming disabled for performance
Cryptographic drivers optimized for NEON
Entropy hook on storage removed for performance
Default file-system mount option with noatime & nodiratime
Power-efficient workqueues backported from linaro-lsk
Deep-discard-trim; FIDTRIM support for ext4
/* User configurable vnswap toggle */
vnswap is a virtual ramdisk driver from Samsung that can be used with zswap.
The goal is to efficiently replace zram.
Enabling vnswap will try to compress 50% of your RAM, resulting in
6GB+ usable memory on Galaxy Note 3 and
4GB+ usable memory on Galaxy S4 LTE-A.
Enabling this will drastically improve multitasking experience at the cost of slightly reduced power efficiency.
This is recommended for users who heavily multitasks or do not turn off the phone for days.
This is turned on by default on all Touchwiz ROMs.
You can manually enable or disable it via writing 1 or 0 to /data/.arter97/vnswap and reboot.
(You will have to create /data/.arter97 directory and create vnswap textfile yourself.)
You can check if the vnswap is working properly by checking /proc/swaps
/* Disclaimer */
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 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. Hard. A lot.
/* Supported device */
Galaxy S4 LTE-A SK (SHV-E330S, ks01lteskt)
Galaxy S4 LTE-A KT (SHV-E330K, ks01ltektt)
Galaxy S4 LTE-A LG (SHV-E330L, ks01ltelgt)
Galaxy S4 LTE + International (GT-I9506, ks01ltexx)
/* Warning */
Redistribution, modifying files used within this project or integrating with other projects are prohibited with no exceptions other than my projects.
Making mirrors, re-uploading to another servers are also prohibited with no exceptions.
/* What you need to know */
'Opensource' does not mean 'no-respect'
Leave credits to original developers
/* FAQ */
Why are other CPU governors disabled?
I personally don't want any of my users to play around CPU governors. It'll start be a mess when I try to add support for other CPU governors.
Can I use stock mpdecision and stock thermal engine?
This one too, I'd like my users to stick with Lazyplug and intelli-thermal. Stock implementation is faulty, cores can lock down with stock mpdecision. As for intelli-thermal, the benchmarking score may reduce but will help for a lower temperature of the device and increase the efficiency of the thermal control.
How can I switch to another or stock kernel?
You may have to reinstall the entire ROM. Wipe /system and install the ROM. The included addon.d script helps the kernel to survive on nightly upgrades, but you need to remove it or wipe /system to switch to another kernel.
/* Thanks to */
faux123
Yank555.lu
temasek
MinL(xens0117)
hsk from Matcl
Codeaurora
Cyanogen
/* Contact */
Email : [email protected]
Twitter : @arter97_dev
/* Downloads */
http://arter97.com/msm8974_kernel.htm
Source code - https://bitbucket.org/arter97/android_kernel_samsung_msm8974
/* Installation */
1. Put the downloaded kernel on your internal storage
2. Enter ClockworkMod(or PhilZ) recovery
3. Flash kernel
XDA:DevDB Information
arter97 kernel for Galaxy S4 LTE-A, Kernel for the Samsung Galaxy S 4
Contributors
arter97, faux123, yank555
Source Code: https://bitbucket.org/arter97/android_kernel_samsung_msm8974
Kernel Special Features:
Version Information
Status: Stable
Created 2015-02-11
Last Updated 2015-10-09
