KERNEL ❯ G95xF/D ❯❯ Velocity Kernel • v11 • January 14 - Samsung Galaxy S8 & S8+ Cross Device Development

Velocity Kernel • Galaxy S8/+
by kdrag0n
This kernel has been abandoned.​
Unfortunately, due to a lack of time, I have decided to abandon this kernel. Thanks to everyone who supported this project while it was alive.
kdrag0n said:
As I'm sure you've all seen, updates for this kernel have been slowing down recently. This is because I've moved onto the Pixel 3 XL as my primary device. The experience is just miles ahead of the S8 in nearly all aspects, leading me to basically ditch the S8 entirely. Instead of making do with unstable updates with several months between each update, I've decided to just abandon all development for this device. I may still push commits from time to time on GitHub for personal use, but there will never be another public release.
It's been a great journey and learning experience along the way as the second kernel I've ever worked on, but I'm afraid it has to come to an end like all good things do eventually. For your next kernel, I'd suggest trying out RZ Kernel which seems to be quite promising so far with the first EAS implementation for our device. Sorry for any inconveniences this may have caused.
You can still donate to support my future projects and other endeavors if you wish.
Farewell.
Click to expand...
Click to collapse
The original post is available below for reference.
Flash at your own risk.
Introduction
Velocity Kernel was made to provide the best possible experience on all devices. We strive to provide the perfect balance of performance and battery life. Features are also plentiful, but features that nobody uses will not be included. We also completely debloat all our kernels and aim for small sizes relative to other kernels. Due to the small size and careful debloating, boot time is also improved.
Compatibility
All Oreo ROMs are supported. Magisk is automatically reinstalled if you already have it installed. Deodexed ROMs should be supported. SELinux Permissive and Enforcing states are available for you to choose.
Features
​ ​ ​ ​ • Latest upstream Linux 4.4.170
​ ​ ​ ​ • Latest Samsung G955FXXU4CRK1 kernel base
​ ​ ​ ​ • CPU Governors: impulse, cultivation, darkness, blu_active, interactive, conservative, ondemand, bioshock, schedutil
​ ​ ​ ​ • I/O schedulers: noop, deadline, cfq, bfq, anxiety, fiops, sio, fifo, sioplus, tripndroid, vr, zen, maple
​ ​ ​ ​ • TCP congestion control algorithms: westwood, reno, bic, cdg, cubic, dctcp, highspeed, hybla, htcp, vegas, veno, scalable, lp, yeah, illinois, lia, olia, wvegas, balia
​ ​ ​ ​ • Legendary battery life and performance
​ ​ ​ ​ • Reduced network latency
​ ​ ​ ​ • Improved input latency and jitter
​ ​ ​ ​ • Faster and lower latency I/O
​ ​ ​ ​ • RGB color control (thanks to flar2) - conflicts with Blue Light Filter
​ ​ ​ ​ • Fading notification LED
​ ​ ​ ​ • Wake gestures
​ ​ ​ ​ • Latest WireGuard VPN module
​ ​ ​ ​ • Optional input boost
​ ​ ​ ​ • ZRAM compression algorithms: lz4, lz4hc, zstd
​ ​ ​ ​ • Fsync control
​ ​ ​ ​ • Wakelock blocker with built-in list
​ ​ ​ ​ • Various updated components
​ ​ ​ ​ • Optimized internal routines
​ ​ ​ ​ • Flicker free AMOLED screen at lower brightness
​ ​ ​ ​ • Small size: 12 MB zip including Magisk
​ ​ ​ ​ • Samsung DeX with all HDMI adapters (no dock needed)
​ ​ ​ ​ • Latest F2FS
​ ​ ​ ​ • Newer CFQ I/O scheduler
​ ​ ​ ​ • All debugging, legacy, and useless features removed
​ ​ ​ ​ • Logging disabled by default
​ ​ ​ ​ • Smooth overall experience
​ ​ ​ ​ • ... and many more!
Click to expand...
Click to collapse
Downloads
Downloads can be found here on GitHub. The topmost release is the latest, currently v11.
Make sure you download the "VelocityKernel-s8-v11.zip" file, not "Source code". Downloads are in the Releases section, not Tags.
XDA:DevDB Information
Velocity Kernel, Kernel for the Samsung Galaxy S8
Contributors
kdragon
Source Code: https://github.com/kdrag0n/velocity_dream
Kernel Special Features:
Version Information
Status: Abandoned
Current Stable Version: v11
Stable Release Date: 2019-01-14
Created 2018-06-09
Last Updated 2019-02-13

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Changelogs
v11 • January 14, 2019
​ ​ ​ ​ • Upstreamed to Linux 4.4.170
​ ​ ​ ​ • Updated Magisk to v18.0
​ ​ ​ ​ • Updated to Samsung CRK1 kernel source
​ ​ ​ ​ • Improved performance by using in-kernel input boosting (@kerneltoast)
​ ​ ​ ​ • Optimized I/O settings and TCP buffer (from Pixel 3)
​ ​ ​ ​ • Switched to updated CFQ as default I/O scheduler (better balanced performance; Pixel 3)
​ ​ ​ ​ • Improved battery and performance with IRQ cluster affinity (@kerneltoast, @Noxxxious)
​ ​ ​ ​ • Disabled debugfs for security and less bloat (@Noxxxious)
​ ​ ​ ​ • Improved battery life: re-enabled some debugging, reverted idle loop changes
​ ​ ​ ​ • Switched to 300 Hz timer for better battery
​ ​ ​ ​ • Switched to z3fold for faster zRAM over time
​ ​ ​ ​ • Replaced ticket spinlocks with optimized queued spinlocks (faster)
​ ​ ​ ​ • Reduced touch latency
​ ​ ​ ​ • Removed UKSM (useless)
​ ​ ​ ​ • Reverted realtime mutex modifications
​ ​ ​ ​ • Enabled protected FIFOs and files for security
​ ​ ​ ​ • Enabled gentle fair sleepers for battery
​ ​ ​ ​ • Disabled support for obscure USB input devices
​ ​ ​ ​ • Disabled wakelock GC to fix some issues with wakelocks breaking
​ ​ ​ ​ • Improved kernel install speed
​ ​ ​ ​ • Switched to CAKE network scheduler with TCP ACK filter
​ ​ ​ ​ • Enabled TCP Fast Open for servers
​ ​ ​ ​ • Switched to queued read-write locks instead of simple ones
​ ​ ​ ​ • Reduced memory fragmentation via compaction (with trigger on screen-off)
​ ​ ​ ​ • Disabled unused Unix IPC support
​ ​ ​ ​ • Enabled support for dm-verity
​ ​ ​ ​ • Fixed some potential media.codec issues (@Noxxxious)
​ ​ ​ ​ • Enabled task statistics
​ ​ ​ ​ • Updated LZ4 to latest mainline state
​ ​ ​ ​ • Optimized CPUSets
​ ​ ​ ​ • Disabled I/O stats for reduced overhead
​ ​ ​ ​ • Reverted I/O affinity and scheduler migration changes
​ ​ ​ ​ • Reverted entropy threshold tuning
​ ​ ​ ​ • Tuned schedutil based on Pixel 3 values
Click to expand...
Click to collapse
Older versions:
r10 • October 28, 2018
​ ​ ​ ​ • Upstreamed to Linux 4.4.162
​ ​ ​ ​ • Updated to Samsung CRJ5 kernel
​ ​ ​ ​ • Updated Android drivers from Google
​ ​ ​ ​ • Fixed reboots during sleep
​ ​ ​ ​ • Reduced jitter
​ ​ ​ ​ • Reduced kernel memory usage
​ ​ ​ ​ • Improved CFQ I/O scheduler
​ ​ ​ ​ • Improved battery life
​ ​ ​ ​ • Improved network latency
​ ​ ​ ​ • Improved smoothness and responsiveness
​ ​ ​ ​ • Added GoogleWiz ROM support
​ ​ ​ ​ • Added Westwood TCP congestion control tunables
​ ​ ​ ​ • Backported improvements from newer kernels
​ ​ ​ ​ • Removed Ultra Kernel Samepage Merging
​ ​ ​ ​ • Removed useless and legacy features
​ ​ ​ ​ • Removed intelliactive and yankactive governors
​ ​ ​ ​ • Removed NetHunter support
Click to expand...
Click to collapse
r9 • September 26, 2018
​ ​ ​ ​ • Linux 4.4.158
​ ​ ​ ​ • Update to Samsung G955FXXU4CRI5 kernel
​ ​ ​ ​ • Update device trees to CRI5
​ ​ ​ ​ • Switch to GCC 8.2.0 toolchain for performance
​ ​ ​ ​ • Add custom Anxiety I/O scheduler as default (made by me and @tytydraco)
​ ​ ​ ​ • Update camera firmware
​ ​ ​ ​ • Update Magisk to v17.2
​ ​ ​ ​ • Undervolt CPU by 100 mV
​ ​ ​ ​ • Enabled strong stack protector (improved security)
​ ​ ​ ​ • Disabled additional debugging and bloat
​ ​ ​ ​ • Faster boot
​ ​ ​ ​ • Add proper GoogleWiz ROM support
​ ​ ​ ​ • Lower temperatures after boot (don't use performance governor)
​ ​ ​ ​ • Lower I/O latency
​ ​ ​ ​ • Improved Spectrum profiles (especially Battery, thanks to Telegram testers)
​ ​ ​ ​ • Improved ZRAM swapping speed
​ ​ ​ ​ • Disabled gentle fair sleepers (more responsive)
​ ​ ​ ​ • Removed realtime patches (more jitter, worse performance)
​ ​ ​ ​ • Removed Zen interactive tuning (worse latency)
Click to expand...
Click to collapse
r8 • July 25, 2018
​ ​ ​ ​ • Linux 4.4.144
​ ​ ​ ​ • Switched to GCC 8.1.1 as Clang companion
​ ​ ​ ​ • Fixed booting on CRGB firmware
Click to expand...
Click to collapse
r7 • July 24, 2018
​ ​ ​ ​ • Updated to Linux 4.4.143
​ ​ ​ ​ • Updated to CRGB ramdisk
​ ​ ​ ​ • Switched to deadline I/O scheduler
​ ​ ​ ​ • Improved boot speeds
​ ​ ​ ​ • Improved app opening speed
​ ​ ​ ​ • Enabled efficient 128-bit numbers
​ ​ ​ ​ • Disabled more debugging
​ ​ ​ ​ • Improved security:
​ ​ ​ ​ ​ ​ ​ ​ ◦ Add memory sanitization and verification
​ ​ ​ ​ ​ ​ ​ ​ ◦ Added additional methods of gathering randomness during early boot
​ ​ ​ ​ ​ ​ ​ ​ ◦ Enabled protected links
​ ​ ​ ​ ​ ​ ​ ​ ◦ Marked some data as read-only after boot
​ ​ ​ ​ ​ ​ ​ ​ ◦ Added checks to memory allocator
​ ​ ​ ​ ​ ​ ​ ​ ◦ Added basic encryption for an internal structure
​ ​ ​ ​ ​ ​ ​ ​ ◦ Added overflow "cookies" to allocator
​ ​ ​ ​ ​ ​ ​ ​ ◦ Restricted access to memory contents
​ ​ ​ ​ ​ ​ ​ ​ ◦ Restricted usage of performance counters
​ ​ ​ ​ ​ ​ ​ ​ ◦ Removed ability to view process stacks
​ ​ ​ ​ ​ ​ ​ ​ ◦ Removed tracing
​ ​ ​ ​ ​ ​ ​ ​ ◦ Restricted processes' ability to use ptrace (Termux still works)
​ ​ ​ ​ • Switched to clang for smoothness
​ ​ ​ ​ • Added writeback throttling (should improve performance under disk load, such as updating apps)
​ ​ ​ ​ • Increased timer frequency to custom 500 Hz for responsiveness
​ ​ ​ ​ • Switched to FQ CoDel network scheduler for better performance and latency on Wi-Fi, data, USB ethernet, etc
​ ​ ​ ​ • Tuned scheduler migration
​ ​ ​ ​ • Fully multithreaded disk IO
​ ​ ​ ​ • Removed debug stack tracing (5-10% overhead)
​ ​ ​ ​ • Reduced kernel size dramatically
​ ​ ​ ​ • Removed old Wi-Fi fix (improves Wi-Fi stability)
​ ​ ​ ​ • Added DriveDroid support (CD-ROM and RO/RW USB)
​ ​ ​ ​ • Fixed reboots after removing USB storage device or microSD card
​ ​ ​ ​ • Optimizations all over
Click to expand...
Click to collapse
r6 • June 29, 2018
​ ​ ​ ​ • Fixed wake gestures on regular S8 (thanks to Vaughnellope)
​ ​ ​ ​ • Disabled MAC address randomization by default (enable via /proc/sys/dev/cnss/randomize_mac)
​ ​ ​ ​ • Added CD-ROM emulation
​ ​ ​ ​ • Added SELinux chooser via Volume up/down
​ ​ ​ ​ • Fixed sharing issues on Sac23 S9 port ROM
​ ​ ​ ​ • Simpler LED control to fix purple LED
​ ​ ​ ​ • Added Magisk 16.3, only installs if Magisk was previously installed
​ ​ ​ ​ • Enabled quotas only if using modified TWRP, available in the release downloads
​ ​ ​ ​ • Added all Kali NetHunter features except HID emulation (packet injection, Wi-Fi dongles, SDRs, IPC)
​ ​ ​ ​ • Fixed multitasking and memory usage
Click to expand...
Click to collapse
r5 • June 19, 2018
​ ​ ​ ​ • Linux 4.4.138
​ ​ ​ ​ • Switched to GCC 7.3 for a much smoother kernel
​ ​ ​ ​ • Increased ZRAM size and swappiness to fix low memory
​ ​ ​ ​ • Fixed SafetyNet on ROMs with permissive SELinux
​ ​ ​ ​ • Added automatic log collector script for debugging
​ ​ ​ ​ • Disabled unnecessary CPU bug workarounds (not applicable to Exynos 8895)
Click to expand...
Click to collapse
r4 • June 16, 2018
​ ​ ​ ​ • Linux 4.4.137
​ ​ ​ ​ • Improved battery life
​ ​ ​ ​ • Updated to CREF ramdisk
​ ​ ​ ​ • Enabled ZRAM to fix lag and crashing
​ ​ ​ ​ • Enabled emulation of deprecated instructions to fix crashing
​ ​ ​ ​ • Newer, more stable LED control
​ ​ ​ ​ • Tuned LED fading parameters
Click to expand...
Click to collapse
r3 • June 11, 2018
​ ​ ​ ​ • Fixed Wi-Fi
​ ​ ​ ​ • Fixed flashing over other kernels (especially NX)
​ ​ ​ ​ • Fixed low amount of apps in memory
Click to expand...
Click to collapse
r2 • June 9, 2018
​ ​ ​ ​ • Fixed bootloop after installation over stock kernel
Click to expand...
Click to collapse
r1 • June 9, 2018
​ ​ ​ ​ • Initial release
​ ​ ​ ​ • Linux 4.4.136
Click to expand...
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??

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Bootloop on S8 logo

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Not working for me... flashed kernel, wiped dalvik but stuck on boot logo. Running S8+ with ambasadii v3.7

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Very laggy for me on s8 ambasadii

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Post SoT if you're trying it everyone.

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I just released r2 to fix bootloops for those previously using a stock kernel. Get it here on GitHub.
Changelog:
​ ​ ​ ​ • Fixed bootloop after installation over stock kernel
Click to expand...
Click to collapse

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Is this for Snapdragon or Exynos?

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Do i need to wipe cache after flashing?
Sent from my [device_name] using XDA-Developers Legacy app

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Mangtas_666 said:
Do i need to wipe cache after flashing?
Sent from my [device_name] using XDA-Developers Legacy app
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No.

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Kizoky said:
Is this for Snapdragon or Exynos?
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Exynos, clarified in the OP.

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lag rom bro not work wifi temperature high =??

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Has_anDroid said:
lag rom bro not work wifi temperature high =??
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I don't understand what you're saying. Wi-Fi doesn't work?

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Is this kernel for touchwiz rom?
---------- Post added at 07:44 AM ---------- Previous post was at 07:35 AM ----------
Wifi not working for me!!! Im on renovate v135 oreo CRD7 bases

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Problema wi-fi and very high laggy

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Please provide telegram group. Does this kernel supports s9+ ported roms?

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Kernel laggy for me too Ambasadii.... has a lot of potential this one though so hoping the OP sticks on for the ride

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Come from Renovate Ice with Nx kernel
After install bootloop

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Flashed it over Nox Kernel and bootloops