[Kernel][CM12.1/AOSP]3.4.112_x_kernel_v1.5 (18/05/2016) - Moto X Android Development

x_kernel
Introduction, Credits & Thanks
Hey guys,
i finished building a basic kernel for the Moto X. As far as i can see this kernel would be ready to release. I cannot encounter any bugs atm and the kernel is running stable and fast. Though, my main focus is not to distinguish myself, rather i am interested i some collaboration.
So this thread is dedicated to @tdhite @skiwong20 @zwliew @Gustavo_s @Megatron007 @##W4TCH0UT## @cyril279 @athulele ,.. which all did some great work in developing some roms and kernels already. I am sure i missed someone, feel included as well and i like to invite you to take the source, build the kernel and bring in your experience in testing, debugging, discussion and further improving. Together with arm-eabi-4.8 the kernel compiles without any errors and warnings.
Summary
But first let me summarize the status of my work and explain what i have done so far:
Based on the motorola source i updated the kernel to Linux Version 3.4.110.
During this process i had to adapt many commits to match the moto source. Also some patches needed to be excluded completely, because some stuff differed to much to merge the updates on top. A detailed description you find in this commit: Squashed update of cm-12.1 kernel to Linux 3.4.110
Second i examined the codeaurora LA.AF.1.1_rb1.18 branch and picked most of for our device left, relevant and working commits as well. Among others these includes patches for kgsl/gpu, camera, audio, net and wlan. Some stuff needed to be adapted too. Tag: LA.AF.1.1_rb1.18-extract
Main Features
- Linux Kernel 3.4.112 updates
- Codeaurora LA.AF.1.1_rb1.18 branch updates
- IoScheduler: Fiops, Sio, Vr, Zen
- Smartmax Governor and the changes by @tdhite
- IntelliActive Governor -> changed frequencies to match msm8960dt
- Intellidemand Governor-> changed frequencies to match msm8960dt
- Interactive Governor -> updates from the razrqcom-dev-team git and much more
- Faux's simple GPU governor
- Faux's IntelliPlug, IntelliThermal, Soundcontrol and USB Fastcharge adaption
- Vibration Strength Control
- Userspace LUT tuning & Colour Calibration, thx to @Gustavo_s
- Zram, Zsmallox, Zcache, Frontswap -> complete Linux Kernel 3.17 backport, a lot of credits goes to the razrqcom-dev-team
- Lz4 compression/decompression
- Kernel Mode Neon + Crypto SHA512 support
- complete lowmemorykiller backport with adaption to vmpressure and many other tweaks
- Rewritten overclocking capabilities up to 1890Mhz, thx to @faux123 fot his initial coding
- Kernel underclocking with a lower frequency of 189 Mhz, thx to @zwliew
- Customizable voltage table / Voltage regulator
- Kernel Samepage Merging tweaks
- disabled sparsemem
- WQ_POWER_EFFICIENT for power oriented workqueues
- LoUIS API for cache maintenance ops
- Scheduler updates
- RCU_FAST_NO_HZ enabled
- massive update regarding kernel's memory managment
- many many more stuff
- init.d script tweaks, see second post
Leftovers
Tweaks discarded for now or to be reviewed and reimplement:
- lib/string & lib/memcopy glibc version -> It is just a placebo maybe
- frandom -> may be incompatible with lollipop and can cause problems
- unaligned access -> can cause problems with a optimized toolchain
- adreno idler -> needs the implementation of powersuspend which we dont have atm
- vnswap, zswap,.. -> does anybody know a proper and up-to-date backport?
- optimizations flags to compile with linaro or uber
- more hotplug driver
Thats all from my side for now.
If there is any stuff which should be reverted, something that may cause problems, feel free to report.
If you have some recommendations, for example what hotplug driver to check and bring in tell me.
Whatever, every feedback is welcome.
Credits and Thanks to:
CyanogenMod, Kernel.org, Code Aurora Forum, Google, razrqcom-dev-team and everyone who is involved in developing for the moto x. Check out the commits author in my git.
Disclaimer: You're installing this at your own risk. Please, make nandroid backups before installing any of these kernels. I take no responsibility for damaging your phone.
XDA:DevDB Information
x_kernel, Kernel for the Moto X
Contributors
tycoo
Source Code: https://github.com/tycoo/moto_x_kernel
Kernel Special Features:
Version Information
Status: Stable
Current Stable Version: v1.5
Stable Release Date: 2016-05-18
Created 2015-12-15
Last Updated 2016-05-18

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Reserved
Important notes / Init Script
I added an init.d script named "x_kernel_init" to tweak some settings, which is pushed into the root folder /system/etc/init.d during the installation of the kernel. Sometimes this script is not completely executed after booting the device. To be sure, that the tweaks are applied and if you want to, start the script manually via the app Kernel Adiutor (downloadable via google play or the corresponding thread here at xda).
All kernel supported settings are tweakable within this app as well, so i strongly recommend to check this out.
At the moment zram isn't enabled via the script anymore, so if you need it, you have to enable it on your own.
If you don't want any of the tweaks to be applied, just delete the script and reboot.
x_kernel_init:
Code:
#!/system/bin/sh
echo "Applying 3.4.112_x_kernel init tweaks"
echo "..."
sleep 1
#cpu interactive
if [ -d /sys/devices/system/cpu/cpufreq/interactive ]; then
echo "50" /sys/devices/system/cpu/cpufreq/interactive/go_hispeed_load
echo "918000" /sys/devices/system/cpu/cpufreq/interactive/hispeed_freq
echo "60000" /sys/devices/system/cpu/cpufreq/interactive/min_sample_time
echo "80" /sys/devices/system/cpu/cpufreq/interactive/target_load
fi;
#cpu
if [ -d /sys/devices/system/cpu/cpu0/cpufreq/ ]; then
echo "384000" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo "1728000" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
fi;
if [ -d /sys/devices/system/cpu/cpu1/cpufreq/ ]; then
echo "384000" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo "1728000" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq
fi;
if [ -d /sys/module/cpu_boost/parameters/ ]; then
echo "918000" /sys/module/cpu_boost/parameters/input_boost_freq
sleep 1
#cpu screen off frequency limit
if [ -d /sys/module/intelli_plug/parameters ]; then
echo "1728000" > /sys/module/intelli_plug/parameters/screen_off_max
fi;
sleep 1
#kernel samepage merging
if [ -d /sys/kernel/mm/ksm ]; then
echo "Disable kernel samepage merging"
echo 0 > /sys/kernel/mm/ksm/deferred_timer
echo 0 > /sys/kernel/mm/ksm/run
fi;
sleep 5
#VM
if [ -d /proc/sys/vm ]; then
echo "Virtual Memory settings:"
echo "Dirty Ratio = 10"
echo "Dirty Background Ratio = 75"
echo "Dirty Expire Centisecs = 380"
echo "Dirty WriteBack Centisecs = 950"
echo "Swappiness = 20"
echo "Vfs Cache Pressure = 90"
echo "10" > /proc/sys/vm/dirty_background_ratio
echo "75" > /proc/sys/vm/dirty_ratio
echo "380" > /proc/sys/vm/dirty_expire_centisecs
echo "950" > /proc/sys/vm/dirty_writeback_centisecs
echo "20" > /proc/sys/vm/swappiness
echo "90" > /proc/sys/vm/vfs_cache_pressure
fi;
sleep 1
#lowmemorykiller
if [ -d /sys/module/lowmemorykiller/parameters ]; then
echo "Enabling adaptive LowMemoryKiller"
echo "530592" > /sys/module/lowmemorykiller/parameters/vmpressure_file_min
echo 1 > /sys/module/lowmemorykiller/parameters/enable_adaptive_lmk
echo "Setting LowMemoryKiller Minfree to Aggressive"
echo "0,20,50,100,250,500" > /sys/module/lowmemorykiller/parameters/adj
echo "2048,4096,8192,16834,24576,32768" > /sys/module/lowmemorykiller/parameters/minfree
fi;
sleep 1
#zram
#SIZE=270
#swapoff /dev/block/zram0
#echo "Setup Zram swap device with a size of 270MB"
#echo 1 > /sys/block/zram0/reset
#echo "Set Zram max compressions streams to 8"
#echo 8 > /sys/block/zram0/max_comp_streams
#sleep 1
#if [ $SIZE -ne 0 ]; then
# echo $(($SIZE*1024*1024)) > /sys/block/zram0/disksize
# mkswap /dev/block/zram0
# swapon /dev/block/zram0
#fi;
#sleep 1
echo "...finished"
sleep 3
exit

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Reserved
Changelog:
v1.5 https://github.com/tycoo/moto_x_kernel/commits/x_v1.5
- added some tweaks from teammex's kernel
- added many commits regarding RCU_FAST_NO_HZ, Scheduler and smpboot from zwliew's kernel
thx to @zwliew & @TeamMex
v1.4 https://github.com/tycoo/moto_x_kernel/commits/x_v1.4
- update to Linux Kernel 3.4.112
v1.3 https://github.com/tycoo/moto_x_kernel/commits/x_v1.3
- underclocking & overclocking implemented by default
- finally fixed mpdecision/thermal daemon breaking the user set frequency limits.
Benefits: - phone doesnt boot at overclocking frequency anymore, this was especially an issue on core 2.
- gov smartmax is usable together with mpdecision
- disabled sparsemem
- added faux simple gpu governor
- sweep to sleep properly working
- added WQ_POWER_EFFICIENT for power oriented workqueues
- massive memory management updates
- a lot of cpu, cpufreq and gov interactive related updates
v1.2.1 UC/OC experimental https://github.com/tycoo/moto_x_kernel/commits/x_v1.2.11
- added underclock 189Mhz frequency and overclocking capabilities up to 1890Mhz
- added cpu voltage control
- added a init script to disable ksm, tweak vm & lmk and setup zram
Install and proceed with caution:
- changing the clocks and voltages to higher or lower values can cause instabilities and in the worst case damage your phone
- changing, limiting and setting the cpu frequencies only works with intelli plug hotplug driver selected! Strongly advise to select intelli plug first after boot.
As already mentioned in the Kernel Aduitor options, Mpdecision can cause issues.
- also the max screen off frequency has to be set to avoid higher frequency during screen off
v1.2 https://github.com/tycoo/moto_x_kernel/commits/x_v1.2
- applied latest cyanogenmod cm-12.1 changes from Dec 22: https://github.com/tycoo/moto_x_kernel/commits/cm-12.1
- enabled fast charge
v1.1:
- implement LoUIS API for cache maintenance ops
- rbtree updates
- lowmemorykiller updates with the latest adaption to vmpressure, rbtree, ...
..

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Great.
Let´s try it. Our moto x deserve this.
Congratulations about this job.

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Good job!
Running very well on my phone with SlimLP.

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Was the download link removed?
Sent from my ghost using Tapatalk 2

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good working

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infectedorganism said:
Was the download link removed?
Click to expand...
Click to collapse
In the tab downloads

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UrielGT-X said:
In the tab downloads
Click to expand...
Click to collapse
Thanks. I couldn't see that on Tapatalk.
Sent from my ghost using Tapatalk 2

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Thanks for a new Kernel @tycoo
Could F2FS support be also added at some stage ?

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orky87 said:
Thanks for a new Kernel @tycoo
Could F2FS support be also added at some stage ?
Click to expand...
Click to collapse
F2FS should be in already. Intervigilium merged the motorola f2fs driver into the cm-12.1 branch before.

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Nice job...will test within the next few days with Mokee Rom.
Sent from my Moto X using Tapatalk

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tycoo said:
F2FS should be in already. Intervigilium merged the motorola f2fs driver into the cm-12.1 branch before.
Click to expand...
Click to collapse
Applying F2FS causes infinite boot for me not sure whats causing it but could you verify that it works..

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orky87 said:
Applying F2FS causes infinite boot for me not sure whats causing it but could you verify that it works..
Click to expand...
Click to collapse
I'm using this kernel with /cache and /data formatted for f2fs.
Flash this kernel first, then flash the file linked below. It should work.
Credits to @chaoslimits for the fix.
https://www.dropbox.com/s/sko06ob7qja8f8p/ghost_F2FS_enable_v1.zip?dl=0
Also, a BIG thanks to @tycoo for the kernel. Everything is running smooth and stable thus far.
Sent from my ghost using Tapatalk 2

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Nice fix @chaoslimits & thx @infectedorganism for sharing
Didn't know about that. My kernel uses Anykernel atm, which grabs the ramdisk of the previous rom or kernel installation during the flashing procedure.
So the good thing is, once you flashed the provided fix and it doesn't matter when, if you are staying with a kernel with Anykernel afterwards you never have to install the fix again.

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Small update to x_kernel_v1.1
- implement LoUIS API for cache maintenance ops
- rbtree updates
- lowmemorykiller updates with the latest adaption to vmpressure, rbtree, ...
https://github.com/tycoo/moto_x_kernel/commits/v1.1
Lets see how this goes

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Error while flashing... No MD5 and it's 138mb? So confused can someone mirror this?
Sent from my Moto X using Tapatalk

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tycoo said:
Small update to x_kernel_v1.1
- implement LoUIS API for cache maintenance ops
- rbtree updates
- lowmemorykiller updates with the latest adaption to vmpressure, rbtree, ...
https://github.com/tycoo/moto_x_kernel/commits/v1.1
Lets see how this goes
Click to expand...
Click to collapse
add new features included underclockin and fast charger?

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tchula said:
add new features included underclockin and fast charger?
Click to expand...
Click to collapse
no underclocking yet, fastcharge is in but is not activated in defconfig

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Still don't get this...
Sent from my XT1055 using Tapatalk