[KERNEL] [G800F/M/Y] Spookcity_Kernel-N (For all 7.x custom ROMS)

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a-dead-trousers

Senior Member
Jul 28, 2016
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New test build up. Hopefully some of these random reboot issues are fixed,fingers crossed. Download Here
Hi.
The stats "no data connection" and "no or unknown signal" inside BetterBatteryStats are back again accompanied with a "heavy" battery drain (dropped from around 4 days to less than 3 days)
With 4.0 and 4.0a everything was fine so for the time being I'll revert to 4.0a .
I'm a "not always connected" user so to reproduce this you need to deactivate wifi and/or mobile data.
wkr ADT
 
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spookcity138

Senior Member
Nov 9, 2015
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Eindhoven
Hi.
The stats "no data connection" and "no or unknown signal" inside BetterBatteryStats are back again accompanied with a "heavy" battery drain (dropped from around 4 days to less than 3 days)
With 4.0 and 4.0a everything was fine so for the time being I'll revert to 4.0a .
I'm a "not always connected" user so to reproduce this you need to deactivate wifi and/or mobile data.
wkr ADT

Thanks for the feedback. This is very weird and I can't explain why this would be. The only difference between v4.0a and v4.0b is that I reverted 2 commits. Both related to HZ and both with very small changes code wise. There should be no reason for this issue. So I'm at a loss.
I guess you don't have the random reboot issue with v4.0a? I did and I can say the last test build,in 2 days of testing has seemingly solved that for me.



Sent from my SM-G800F using Tapatalk
 

Panzerknakker

Senior Member
Jan 17, 2017
120
267
83
Never had any random reboot with 3, 4, 4a or 4b.
Nevertheless would be happy to see the git repo updated, to understand what I flash.
Thanks for your work.
 

a-dead-trousers

Senior Member
Jul 28, 2016
267
135
43
I guess you don't have the random reboot issue with v4.0a?
nope. never had.
If I remeber right the issue with "no data connection" and "no or unknown signal" first occured after you introduced "TCP congestions" (2.0) and was gone after you "Added the rest of the TCP congestions" (3.0). I only mention these TCP related changes because "no data connection" and "no or unknown signal" sounds like a network related problem. ;)
 

spookcity138

Senior Member
Nov 9, 2015
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Never had any random reboot with 3, 4, 4a or 4b.
Nevertheless would be happy to see the git repo updated, to understand what I flash.
Thanks for your work.

Understood,I have chosen a rather strange way of releasing builds. I commit and push all changes to the main "1.6_OC" repo (which is exactly the same as the 1500MHZ version minus the OC) Then choose changes that I feel are large enough to warrant a test build and release these. I have however started to create local branches for v4.0 and what will be v5.0 (which is the latest test version 4.0b) I will push these to my git and share the links in this post in a few. This should give some idea of my changes per build and perhaps help others with figuring out some issues.

Version 4.0 - Github
Version 5.0 (test version 4.0b) Github

nope. never had.
If I remeber right the issue with "no data connection" and "no or unknown signal" first occured after you introduced "TCP congestions" (2.0) and was gone after you "Added the rest of the TCP congestions" (3.0). I only mention these TCP related changes because "no data connection" and "no or unknown signal" sounds like a network related problem. ;)
Thanks,that is possible I suppose. I'm not real sure. I just don't know why this issue now. I will look over my commits and try to see. Also,strange that some had no reboot issues with v4.0a and some did. Also strange,but oh well.
 
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Knoose

Senior Member
Oct 19, 2016
81
34
0
Deventer
Hi.
The stats "no data connection" and "no or unknown signal" inside BetterBatteryStats are back again accompanied with a "heavy" battery drain (dropped from around 4 days to less than 3 days)
With 4.0 and 4.0a everything was fine so for the time being I'll revert to 4.0a .
I'm a "not always connected" user so to reproduce this you need to deactivate wifi and/or mobile data.
wkr ADT
I am very interested in what kind of settings you have if you manage to get 4 days out of a charge :) i use greenify and ds battery saver and get 2 days max.
 

spookcity138

Senior Member
Nov 9, 2015
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Eindhoven
I'm also still facing random reboots with 4.0a and 4.0b, maybe it's a RR issue? I clean flashed everything and also flashed the official Marshmallow OTA a few days ago...

So strange how this issue doesn't effect everyone. This makes it more difficult to track down. I never had any reboots,well maybe 1 or 2 in months of using different versions of this kernel,until the last test version (4.0a). Since I reverted the HZ related commits I haven't had one in 2 days. Its just strange. Some obviously have had no issues,reboot wise,with any version,so I just don't know. I can't imagine that it's RR related. I know Oleggluk uses RR and while I haven't heard from him in a bit,he hasn't reported reboot issues to me. I will continue to try to look into this.

Edit:
Question: You did not have these random reboots with the last release on here v4.0?
 
Last edited:

spookcity138

Senior Member
Nov 9, 2015
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No, 4.0 worked fine. I only had really few random reboots, maybe one or two in total.. 4.0a and b crash after less than 5 minutes of use, in perticular when screen is locked for about 30 secs
OK,thank you. I'll have a look at the changes I've made since the last "official" release on here and see if anything jumps out at me that could perhaps be the cause. I'm still thinking something suspend related judging by the reboots occurring mostly with the screen off.

Sent from my SM-G800F using Tapatalk
 

a-dead-trousers

Senior Member
Jul 28, 2016
267
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I am very interested in what kind of settings you have if you manage to get 4 days out of a charge :) i use greenify and ds battery saver and get 2 days max.
Wifi and/or mobile data only active when I need them (e.g. surfing the net).
Magisk & DozeGMS+ to put Google Play Services into doze.
GPS not active. Also deactivated the "Search" option in advanced (three dots) menu of location settings, otherwise it keeps wifi running even if it is turned off in the wifi settings.
BetterBatteryStats to check if everything not needed is turned off ;) Anything but "deep sleep" should be on a low value (~5% max.).
 
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MikeT.

Senior Member
Mar 29, 2017
122
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Samsung Galaxy S9
I'd have also two or three reboots when screen off with v4.0 in last days. I switched to 4.0b at day of release, no reboots since this installation.
Battery drain is a little bit higher.
RRemix, clean installed after stockfirmflash, v4.0a not tested.
 

Danko Jones

Senior Member
Nov 17, 2013
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I'd have also two or three reboots when screen off with v4.0 in last days. I switched to 4.0b at day of release, no reboots since this installation.
Battery drain is a little bit higher.
RRemix, clean installed after stockfirmflash, v4.0a not tested.

I also had no reboots with v4.0b for now. But I also noticed higher battery drain with newest version.
 

spookcity138

Senior Member
Nov 9, 2015
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Eindhoven
I'd have also two or three reboots when screen off with v4.0 in last days. I switched to 4.0b at day of release, no reboots since this installation.
Battery drain is a little bit higher.
RRemix, clean installed after stockfirmflash, v4.0a not tested.

I also had no reboots with v4.0b for now. But I also noticed higher battery drain with newest version.

Thanks a lot for the feedback guys. It's very appreciated! I also have not had a reboot with v4.0b. So even if the 2 commits relating to HZ that I reverted are not fully to blame,they were definitely a big part of the problem. No clue why battery drain would be higher. I will have a look when I have some time.
 

spookcity138

Senior Member
Nov 9, 2015
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Wow. Core test v4b = 23.1 MB (24,257,091 bytes)
The core V5 = 10.0 MB (10,547,814 bytes)
Did I miss something? :D
Hah,nope,but apparently I did. The only reason it would be that size is because I zipped up something else with v4.0b. More then likely another kernel zip. Oops:D

Sent from my SM-G800F using Tapatalk
 

spookcity138

Senior Member
Nov 9, 2015
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Unfortunately, my phone still crashes seconds after locking the screen - even with v5.0 :( Here are my logs. I'm on Selinux enforcing, does that make a difference?

Very strange. Again.thanks for the log. It is really appreciated. There is nothing at all there however that would explain this. If you are able to get the last kernel log after this happens it may be more helpful. I posted how to do this a few pages back in this thread. I don't see why SELinux set to enforcing would matter,but who knows. I can easily build and enforcing kernel to test this.
 

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  • 18
    Code:
    /*
     * 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, DO NOT
     * point the finger at me for messing up your device.
     * this kernel is only for the S5 mini SM-G8OOF/M/Y (Exynos) Do Not Flash this on any other device!
     */

    19-10-2017 * Updated to v6.0 * Changes are in red or can be seen at the bottom of this post in the changelog: I am always applying patches to hopefully improve the kernel,so check out the "Patches and tweaks applied" section for a better view of the changes as well.

    Notes
    • ALWAYS read the "Known Issues" section before flashing. I will add issues I have noticed or have been told about. Some may be VERY important. If you fail to do this and experience an issue that is listed I can not help you!
    • SELinux is set to permissive in this kernel. You can change this to enforcing at boot if you wish via an app like Kernel Adiutor-Mod
    • About voltage control: Setting frequencies that are unstable are going to cause lockups,freezes and reboots. This is NOT a fault in the kernel. My suggestion is to move the voltages up or down slowly (+/- 25) until you find some stable voltages that you're happy with.
    • Enough people were having problems with the 1.6ghz overclocked version that I've decided to release a non overclocked (1.5ghz) build as well. I would recommend trying the 1.6ghz and only if you experience a bootloop or instability then use the 1.5ghz version. I will not keep older versions of the 1.5ghz build up. Only the latest.
    • Having troubles deciding on a CPU governor or an I/O scheduler? Here is an amazing guide. All credits to Saber. Be sure to hit the thanks button. He obviously put a lot of time into that.
    Features
    • Based on the latest Samsung kernel sources
    • Built an updated Sqlite3 (from version 3.9.2 -> 3.19.3 that will be pushed along with the kernel install (you can verify this by running "sqlite3 --version" in a terminal emulator before the new kernel install and then again after)
    • Compiled with self-built (ct-ng) UBERTC 8.0
    • Patched Linux to latest 3.4.113
    • Unlocked CPU frequencies: 200MHZ and 300MHZ
    • GPU overclocked to 600MHZ
    • CPU Overclocked to 1.6GHZ
    • CPU voltage control ( Max voltage =1500mV. Min voltage =600mV)
    • DriveDroid support (add sysfs entry for cdrom to LUNs)
    • Implemented zen-tune v4.5
    • Added CPU boost driver
    • Added PIE net scheduler
    • Added support for USB keyboards (You need This app)
    • Reduced vm_swappiness from 60 to 20
    • Added I/O scheduler switcher by sultanxda (changes the I/O scheduler for a specified request queue to Noop when the screen turns off in order to improve power consumption while the screen is off)
    • Added Fsync on/off
    • Added dynamic fsync
    • Added Dynamic management of dirty page writebacks (allows to have two different intervals for dirty page writebacks and to dynamically manage them when the system has been resumed (it's active) or when has been suspended - Not adjustable via Grarak's Kernel Adiutor app)
    • Proc: much faster /proc/vmstat
    • Full CIFS support ( Modules will be pushed with kernel install )
    • Introduced new flag WQ_POWER_EFFICIENT for power oriented workqueues ( Allows for power saving if selected in Kernel Adiutor ETC. )
    • Added /dev/frandom support ( It is yet to be implemented properly yet however )
    • Properly enabled faux123's powersuspend v2.5
    • Fading LED's
    • Enabled graphite
    • Enabled AIO
    • Readahead set to 512 (from 128 default)
    • Reverted "Enabled arch power" (There will be a switch to enable/disable this in the next build)
    • Many build flags for optimization
    • Added optimization flags for the GPU
    • Many more features being worked on and coming soon

    Added CPU governors
    - nightmare
    - wheatley
    - zzmoove
    - dancedance
    - darkness
    - hyper
    - lionheart
    - ondemandplus
    - bioshock
    - pegasusq
    - smartmax
    - alucard (by alucard24)
    - bluactive
    - intelliactive (by faux123)
    - intellidemand

    Added CPU hotplug governors
    - alucard hotplug (by alucard24)
    - intelliplug hotplug (by faux123)
    - thunderplug hotplug (by varun.chitre15)
    - MSM Sleeper hotplug
    - autoSMP hotplug

    Added IO schedulers
    - fiops
    - sio
    - zen
    - fifo
    - tripndroid
    - bfq-v7r8

    Added many TCP congestions
    - reno
    - vegas
    - westwood and more
    - Added the rest of the TCP congestions
    - Westwood is now default TCP


    Patches and tweaks applied include:

    - Updated ARM topology and added cpu_power driver
    - Input: Improve the events-per-packet estimate
    - block/partitions: optimize memory allocation in check_partition()
    - block: bfq-iosched: tuning for SSD (thanks to anarkia1976)
    - cpufreq: Move get_cpu_idle_time() to cpufreq.c (This is important for CPU governors to work better/more efficiently with our kernel version-3.4)
    - Fixed all the CPU governors to work properly with the Move get_cpu_idle_time
    - cpufreq: Introduce new relation for freq selection (It selects the frequency with the minimum euclidean distance to target. In case of equal distance between 2 frequencies, it will select the greater frequency)
    - cpufreq: conservative: Set MIN_LATENCY_MULTIPLIER to 20
    - cpufreq-ondemand-Set-MIN_LATENCY_MULTIPLIER-to-20
    - cpuidle-Get-typical-recent-sleep-interval
    - cpufreq: Persist cpufreq time in state data across hotplug
    - implement-LoUIS-API-for-cache-maintenance-operations
    - ARM-kernel-update-cpu_disable-to-use-cache-LoUIS-maintenance API
    - update-v7_setup-to-the-new-LoUIS-cache-main
    - USB-gadget Optimize-tx-path-for-better-performance
    - af_unix: speedup /proc/net/unix
    - net/socket.c: fix: warning: 'sock/sock1/sock2' may be used uninitialized in this function
    - fs/proc/array.c: make safe access to group_leader
    - lib/memcopy: use glibc version (the kernel's memcpy and memmove is very inefficient. But the glibc
    version is quite fast, in some cases it is 10 times faster than the kernel version)
    - lib/string: use glibc version (same as above)
    - lib/int_sqrt.c: optimize square root algorithm
    - readahead: make context readahead more conservative
    - sched-Fix-select_idle_sibling-bouncing-cow-syndrome
    - sched-Implement-smarter-wake-affine-logic
    - sched-Micro-optimize-the-smart-wake-affine-logic
    - sched: Reduce overestimating rq->avg_idle
    - power: make sync on suspend optional
    - tcp: tweaked for speed
    - writeback-fix-occasional-slow-sync
    - writeback-fix-writeback-cache-thrashing
    - wireless - bcmdhd - reduce scan dwell time to reduce power usage
    - bcmdhd reduce wakelocks
    - mutex-Queue-mutex-spinners-with-MCS-lock-to-reduce-cc
    - mutex-Make-more-scalable-by-doing-less-atomic-operations
    - ARM-use-generic-unaligned.h
    - Kconfig-enabled-unaligned-capability-for-ARM
    - decompressor-Enabled-unaligned-memory-access
    - Optimized-ARM-RWSEM-algorithm
    - ARM: Fixed negative idle stats for offline cpu
    - disabled debugfs[/COLOR]
    - mm: remove noisy remainder of the scan_unevictable interface
    CONFIG_HZ=100 (reverted commit)
    - Plus many more - Check my git repo for full details.

    Sources


    Known Issues
    • Setting alucard hotplug along with certain other governors at boot via kernel adiutor etc can cause a reboot after setting is applied. So be certain to set the "delay" time in kernel adiutor or similar to 10 seconds or more,so if you have this you are able to cancel and change after a reboot.
    • There is a chance of some settings being reset after flashing the kernel (quick setting,sound,statusbar etc.) This is rather insignificant and all settings that have been changed can be set back in minutes.

    Installation
    I HIGHLY recommend that you do a full backup before flashing this kernel. I am not responsible if you lose any or all of your data.

    1.Download "Spookcity_Kernel-N"
    2.Place the zip onto your phones storage
    3.Reboot into recovery (Volume-Up + Home + Power button)
    4.Select install
    5.Flash the downloaded kernel
    6.Go back a few times in TWRP Select wipe -> Advanced wipe and wipe Dalvik/Art cache and the cache partition.
    If you do not do this you are very likely to experience strange issues.You have been warned.Do not report problems if you did not do this.
    7.Reboot


    Code:
    Feedback can also be posted[URL="https://github.com/Spookcity/ROMS-G800F/issues/12"]-------> Here[/URL]
    Test builds will be released [URL="https://github.com/Spookcity/ROMS-G800F/issues/22"]-------> Here[/URL]

    Download the latest build

    Download older version
    Code:
    [URL="https://www.androidfilehost.com/?fid=745425885120759188"]Version 5.0[/URL]
    [URL="https://www.androidfilehost.com/?fid=889764386195920916"]Version 4.0[/URL]
    [URL="https://www.androidfilehost.com/?fid=673368273298972709"]Version 3.0[/URL]
    [URL="https://www.androidfilehost.com/?fid=889764386195913162"]Version 2.0[/URL]
    [URL="https://www.androidfilehost.com/?fid=889764386195911617"]Version 1.0[/URL]
    Huge credit and many thanks to:
    Hennymcc,Ayke,Psyafter,mirhciulica,ctxZ,DjSteve,CurtisMJ,osm0sis,Archidroid,Chet Kener,andip71,faux123,flar2,ZaneZam,anarkia1976,AndreiLux,Yank,Francisco Franco,Sultanxda,varun.chitre15

    Big thanks for testing and giving feedback:
    Oleggluk,StanleyNL,Mikahlo,Guntzog
    and any others as I'm sure I am forgetting people.

    CHANGELOG
    HTML:
    01-09-2017 - Released Version 6.0
    
    - Added MSM Sleeper hotplug
    - Reduced vm_swappiness from 60 to 20
    - Added intellidemand governor
    - Added autoSMP hotplug
    - Added CPU boost driver
    - Proc: much faster /proc/vmstat
    - Cpufreq: Persist cpufreq time in state data across hotplug
    - Reverted "enable arch power"
    - mm: remove noisy remainder of the scan_unevictable interface
    - net/socket.c: fix: warning: 'sock/sock1/sock2' may be used uninitialized in this function
    
    01-09-2017 - Released Version 5.0
    
    - Removed ROW I/O scheduler
    - Added I/O scheduler switcher by sultanxda
    - Added PIE net scheduler
    - Added support for USB keyboards
    - Properly enabled faux123's powersuspend v2.5
    - Added dynamic fsync
    - Added optimization flags for the GPU
    - Enabled AIO
    - Reverted a couple of HZ related commits
    - Added intelliactive governor
    - Added intelliplug hotplug driver 
    - Added thunderplug hotplug driver
    - Added Dynamic management of dirty page writebacks
    - Fixed voltage control on 1500MHZ version
    - Fixed alucard governor
    - Fixed ondemandplus governor
    - Fixed bluactive governor
    - ib/int_sqrt.c: optimize square root algorithm
    - af_unix: speedup /proc/net/unix
    - wireless - bcmdhd - reduce scan dwell time to reduce power usage
    - bcmdhd reduce wakelocks
    - readahead: make context readahead more conservative
    - block/partitions: optimize memory allocation in check_partition()
    - power: make sync on suspend optional
    - block: bfq-iosched: tuning for SSD
    
    05-08-2017 - Released Version 4.0
    
    - Added 1.5GHZ version
    - Added voltage control
    - DriveDroid support
    - Implemented zen-tune v4.5
    - Full CIFS support
    - Introduce new flag WQ_POWER_EFFICIENT for power oriented workqueues
    - Added Fsync on/off
    - Added ROW I/O sheduler
    - Added BFQ-v7r8 I/O scheduler for 3.4 kernel
    - Added Blu_active CPU governor
    - block: disabled add_random
    - tweaked build flags
    - many workqueue related patches
    - tcp: tweaked for speed
    - CONFIG_HZ=300
    - fs/proc/array.c: make safe access to group_leader
    - disabled debugfs
    
     19-07-2017 - Released Version 3.0
    
    -GPU overclocked to 600MHZ
    -Updated Sqlite3 to version  3.19.3 from 06-08-2017
    Added CPU governors
    -bioshock
    -pegasusq
    -smartmax
    -alucard
    -alucard hotplug
    -Added the rest of the TCP congestions
    -cpufreq: Move get_cpu_idle_time() to cpufreq.c
    -Fixed all the CPU governors to work properly with the Move get_cpu_idle_time
    -Added /dev/frandom support 
    -cpufreq: Introduce new relation for freq selection
    -lib/memcopy: use glibc version
    -lib/string: use glibc version
    -
     03-07-2017 - Released Version 2.0
    
    -GPU overclocked to 533MHZ
    Added CPU governors
    -dancedance
    -darkness
    -hyper
    -lionheart
    -ondemandplus
    Added IO schedulers
    -fifo
    -tripndroid
    Added many TCP congestions
    -reno
    -vegas
    -westwood
    -etc.
    
     26-06-2017 - Fix "unsupported device" when flashing in TWRP 3.1.1.0
    
     23-06-2017 - Initial release

    Enjoy!


    XDA:DevDB Information
    [KERNEL] [G800F/M/Y] Spookcity_Kernel-N (For all 7.x custom ROMS), Kernel for the Samsung Galaxy S5 Mini

    Contributors
    spookcity138
    Kernel Special Features:

    Version Information
    Status: Beta

    Created 2017-06-23
    Last Updated 2017-10-19
    9
    Updated to v4.0. See main post for the details.

    Enjoy!
    8
    Updated to v6.0. See main post for details
    Note: I have not had the time to look into and fix the issue that a few have with this kernel. My apologies. I will try my best to look into it soon. I just haven't had much time to work on this kernel recently. All of these commits are from 6 or so week ago so yeah.

    Enjoy!
    8
    Updated to v5.0. See main post for details.

    Enjoy!
    7
    New test build up. Hopefully some of these random reboot issues are fixed,fingers crossed. Download Here
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