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[r21] arter97 kernel for OnePlus 6T

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fordjonathan

Member
Feb 28, 2013
41
14
New York
@arter97 thanks again for the new update as always great work.
ive been using it this couple of days for the most part feels great but i must point out that i keep having less wifi signal bars than stock kernel and the other one is that when using EX Manager press in sound category the phone freezes and reboot to a dump mode or something of sorts and afterwards reboots itself back on

Thanks

I can confirm the sound issue, so far however not the WiFi issue.

I'm running OB11 with Magisk 19.3 and the arter97 r16 release.
My Magisk Modules include: Single User Mod, OOS Native Call Recording and Wifi Bonding (Qcom).

Regards
Jonathan
 

..Cory..

Senior Member
Apr 26, 2012
1,471
2,360
Iowa
@arter97 Hey bro, could you possibly look into adding DTS support to your kernel? I tried this out and really like the improvements I've gotten overall, I just miss my audio quality...

Thanks for your work!
 

arter97

Recognized Developer
Oct 14, 2012
3,782
33,947
24
Seoul
r17 is marked as stable and released as r18.

r18
Linux v4.9.186 merged
Wi-Fi drivers reverted back to stock Snapdragon 845 ones to resolve signal strength issues
Swap variant's LMK aggressiveness adjusted to use the stock values

And just in case you didn't see changelog for r17..

r17b1
Linux v4.9.185 merged
LA.UM.7.3.r1-07900-sdm845.0 merged
LE.UM.3.2.1-00910-SDX24 merged
Wi-Fi drivers updated to 5.2.03.10Q
More debugging features removed from Wi-Fi drivers
Wi-Fi regulatory database taken from OnePlus to fix slow handshakes with 5 GHz APs (by LuK1337)
Faulty Low Memory Killer fixed to work better and resolve wake-up delays
General scheduler improvements backported
Virtual memory allocator performance improved
Task scheduler debugging disabled properly for lower overheads
Many parts of the kernel converted to use hotplug state machine
WireGuard updated to 20190702
Bunch of memory allocations from various subsystems were reworked to perform much better (thanks to Sultan) (total of 46 patches)
Debugging features disabled for Adreno GPU drivers to improve performance
Fixed an issue that was causing charging to be stopped randomly (details)
Rewritten IOMMU by Sultan reverted to resolve screen flickerings
Introducing a new swap variant for memory-hungry users
- Users with 6GB of memory or heavy multi-taskers are recommended to use the new swap variant
- Ditched conventional zram swap approach and taken zswap+vnswap for more efficient memory operations
- Backported zsmalloc memory allocator from mainline
- Backported zswap compressed page cache from mainline
- Samsung's Galaxy S9 memory modifications merged for better swapping efficiency tuned for Android
 

THERAJ12

Senior Member
Feb 16, 2009
456
36
converted to F2FS and i cant get past TWRP due error "init_user_0 failed.

*reinstalling ROM seems to work but still frustrating*
 
Last edited:

reppi

Senior Member
Jul 21, 2008
705
391
Awesome kernel. Running great so far! Thank you!

Very very snappy but battery efficient.
 

vichao.s

Senior Member
Jun 26, 2017
78
36
34
Bangkok
dgm59.com
This might help anyone who are using encrypted f2fs and want to upgrade OTA firmware

1) [Phone] Download Full OTA, TWRP installer, Magisk uninstaller, Magisk installer, f2fs_fstab.zip
2) [PC] Download arter97-kernel (or other f2fs supported kernel)
3) Reboot to TWRP and apply Magisk uninstaller, install firmware, install twrp sequentially.
4) Reboot to Recovery, Allow system modification, and install arter97-kernel via adb sideload
5) Reboot to Recovery and now you should be able to decrypt the data
6) Install f2fs_fstab.zip, Magisk and wipe dalvik cache than reboot
7) Done:)
 

joaste

Senior Member
Sep 11, 2011
878
250
Love this kernel. One of the few that supports f2fs.

Any plans to update to latest 1+ kernel sources for 9.0.16?
 

tekno4ever

Senior Member
Dec 6, 2012
477
280
Hey @arter97 concerning your swap kernel when you state "This kernel has a swap variant for memory-hungry users.
- Users with 6GB of memory or heavy multi-taskers are recommended to use the new swap variant"

Does this also include 1+6t owners with 8gb of ram?

Thanks in advance for your time and efforts!
 

spartan268

Senior Member
Oct 13, 2013
927
348
OnePlus 6
Hey @arter97 concerning your swap kernel when you state "This kernel has a swap variant for memory-hungry users.
- Users with 6GB of memory or heavy multi-taskers are recommended to use the new swap variant"

Does this also include 1+6t owners with 8gb of ram?

Thanks in advance for your time and efforts!

You answered your own question with the quoted piece. If you're a memory hungry users then yes. Otherwise no.
 

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  • 38
    arter97.png

    arter97 kernel for OnePlus 6/6T running OxygenOS​

    /* Details */

    Fully rebased kernel with OnePlus' debugging code out
    Latest CAF msm-4.9 kernel fully merged
    This kernel contains more cutting-edge changes from Qualcomm than the regular sdm845 tag
    Latest Linux 4.9 subversion merged
    Use CONFIG_HZ = 300
    - This changes context switching interval from 10ms to 3.33ms
    - Pixel used this for years and Google recommends other vendors to do the same for fewer jitters
    Memory management improved(from Pixel 2 & 3)
    Pixel's lowmemorykiller used
    DM-verity fully disabled (you can remount /vendor to R/W properly)
    Scheduler commits cherry-picked from Pixel 3
    Timer optimizations
    Additional power savings applied to the display panel
    Heavily optimized touch panel source code resulting in reduced touch latency
    RTL8152/8153 USB LAN adapter support
    TWRP integrated with proper f2fs support (see below)
    Other various optimizations from Paranoid Android
    Permissive SELinux
    Passes SafetyNet
    Built with -O3 speed optimizations
    Built with latest GCC
    Westwood as default TCP network congestion control
    UFS optimizations
    Entropy hook on storage removed
    Latest mainline f2fs support with GC fixes
    CFQ I/O scheduler backported from mainline
    Systemless installation (the kernel doesn't touch /system or /vendor)
    Modules support disabled for lighter kernel
    WireGuard support
    Removed RTB(interrupt) logging entirely
    Various changes merged from the Razer Phone 2 and Snapdragon 855

    /* Notice */

    Both OnePlus 6 and 6T is supported.
    Only OxygenOS is supported, but it is likely that the kernel will work with other ROMs. Though you may encounter minor issues.
    Feel free to tip me which commits are needed to fix other ROMs.

    Unlike my OnePlus 5/5T kernels before, you are free to flash Magisk after installing the kernel. Kernel does not include Magisk by default.

    /* f2fs */

    This kernel fully supports f2fs for /data and I encourage everyone to use f2fs with my kernel for better performance.
    See here as to why you might want f2fs.

    TWRP is not integrated to the kernel.
    Please use a TWRP installer to install TWRP on top of my kernel.

    To use f2fs, download zip files from http://arter97.com/browse/f2fs

    Flash f2fs_tools_for_twrp.zip from TWRP. This won’t format your /data partition.
    This will replace TWRP's f2fs tools with the latest version and pass the correct parameter to mkfs.f2fs, which is necessary.
    This needs to be done everytime you enter TWRP, if you want to re-format to f2fs.

    After formatting, or flashing a new ROM or an OTA, /vendor’s fstab needs to be changed.
    Flash f2fs_fstab.zip to convert fstab to f2fs again. This won’t format your /data partition.

    /* 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.

    /* Thanks to */

    TheCrazyLex
    xboxfanj
    Tim Murray
    RenderZenith
    nathanchance - for android-linux-stable

    /* Instructions */

    You can use the zip file to flash the kernel from your existing TWRP recovery.
    If you don't have TWRP installed already, you can use the img file to flash the kernel directly from your PC via fastboot.

    Both methods will install both kernel and modified TWRP recovery.
    You can check if the modified TWRP is installed by looking at TWRP's version name.
    It should say "arter97-f2fs".

    If you use fastboot method(directly flashing img), you will not pass SafetyNet.

    /* Swap variant */

    This kernel has a swap variant for memory-hungry users.
    - Users with 6GB of memory or heavy multi-taskers are recommended to use the new swap variant
    - Ditched conventional zram swap approach and taken zswap+vnswap for more efficient memory operations
    - Backported zsmalloc memory allocator from mainline
    - Backported zswap compressed page cache from mainline
    - Samsung's Galaxy S9 memory modifications merged for better swapping efficiency tuned for Android

    /* Downloads and links */

    arter97.com
    Kernel source

    XDA:DevDB Information
    arter97 kernel for OnePlus 6T, Kernel for the OnePlus 6T

    Contributors
    arter97
    Kernel Special Features:

    Version Information
    Status: Stable

    Created 2019-01-25
    Last Updated 2019-10-28
    19
    A yuge beta kernel is up.
    It should be a daily driver material, I'm marking it as a beta just in case a major issue slipped that I didn't notice.

    As always, make a back-up!

    A lot changed in the touch panel drivers. Please feedback if you encounter any gestures/wake-up related issues newly introduced with r15b1.

    Encryption now works with f2fs, albeit with a huge caveat: TWRP may not be able to read /data.
    More info: http://arter97.com/browse/f2fs/encrypted
    The procedures for using FBE with f2fs is the same as before, just use the new zip files to format to f2fs.
    You must re-format if you want to use encryption.
    Since encryption now works, OnePlus 6T users can now use f2fs. Though, I haven't been able to test whether TWRP works with 6T + f2fs(FBE). Keep in mind that it may not.

    This kernel is now VLA-free too. VLA(Variable-Length Array) causes performance regression and may expose potential security holes under the Linux kernel. I've managed to get rid of VLA by porting mainline commits and patching some Qualcomm code myself.
    afaik, I'm the first one to do this on XDA. Spread the word and encourage other developers to get rid of VLAs as well :)
    More info regarding VLA: https://www.phoronix.com/scan.php?page=news_item&px=Linux-Kills-The-VLA

    r15b1
    Linux v4.9.175 merged
    Wi-Fi drivers updated to 5.1.1.71H
    Latest f2fs-stable merged
    LA.UM.7.3.r1-07400-sdm845.0 merged
    LA.UM.7.8.r3-01400-SDM710.0 merged
    Fixed a Qualcomm issue that prevented audio-app stune creation
    Fixed an improper timer operation in fuelguage driver causing battery statistics to not update until 20 minutes after boot
    Merged various patches from Proton kernel by kdrag0n to lower overheads and improve responsiveness (thanks to kdrag0n, sultanxda and ab123321)
    Applied various optimizations to the touch panel drivers
    Now VLA-free
    RCU boost enabled for better responsiveness
    New patches made to f2fs for more efficient GC and trim
    FBE(File Based Encryption) now works with f2fs
    17
    /* Changelog */

    r21
    Boot issue fixed caused by improper switch to AK3
    Brightness issue on exiting AOD fixed
    LA.UM.8.3.r1-06300-sdm845.0 merged
    Diag USB interface enabled for QPST

    r20
    Swap compressor backend(LZ4) updated
    LA.UM.8.3.r1-06100-sdm845.0 merged
    Linux v4.9.196 merged
    Wi-Fi drivers updated to 5.1.1.74O
    Latest f2fs-stable merged

    r19
    OnePlus changes merged including support for DC dimming
    Linux v4.9.189 merged
    Wi-Fi drivers updated to 5.1.1.73W
    LA.UM.7.3.r1-08200-sdm845.0 merged
    LA.UM.7.8.r1-06900-SDM710.0 merged (includes various scheduler improvements)

    r18
    Linux v4.9.186 merged
    Wi-Fi drivers reverted back to stock Snapdragon 845 ones to resolve signal strength issues
    Swap variant's LMK aggressiveness adjusted to use the stock values

    r17b1
    Linux v4.9.185 merged
    LA.UM.7.3.r1-07900-sdm845.0 merged
    LE.UM.3.2.1-00910-SDX24 merged
    Wi-Fi drivers updated to 5.2.03.10Q
    More debugging features removed from Wi-Fi drivers
    Wi-Fi regulatory database taken from OnePlus to fix slow handshakes with 5 GHz APs (by LuK1337)
    Faulty Low Memory Killer fixed to work better and resolve wake-up delays
    General scheduler improvements backported
    Virtual memory allocator performance improved
    Task scheduler debugging disabled properly for lower overheads
    Many parts of the kernel converted to use hotplug state machine
    WireGuard updated to 20190702
    Bunch of memory allocations from various subsystems were reworked to perform much better (thanks to Sultan) (total of 46 patches)
    Debugging features disabled for Adreno GPU drivers to improve performance
    Fixed an issue that was causing charging to be stopped randomly (details)
    Rewritten IOMMU by Sultan reverted to resolve screen flickerings
    Introducing a new swap variant for memory-hungry users
    - Users with 6GB of memory or heavy multi-taskers are recommended to use the new swap variant
    - Ditched conventional zram swap approach and taken zswap+vnswap for more efficient memory operations
    - Backported zsmalloc memory allocator from mainline
    - Backported zswap compressed page cache from mainline
    - Samsung's Galaxy S9 memory modifications merged for better swapping efficiency tuned for Android

    r16
    Linux v4.9.180 merged
    Wi-Fi drivers replaced with Snapdragon 855 drivers
    - Switched from 5.1.1 to 5.2.03 release
    - 1810 files changed, 851191 insertions(+), 187458 deletions(-)
    - I've been internally using this for 3 weeks and noticed multiple improvements like faster handshakes and higher throughput without any issues
    Fixed several memory management issues from previous releases
    - This fixes multiple issues including performance regressions(wake-up delays, etc) and radio malfunctions
    - Thanks to @habylab for testing multiple builds prior to release)
    Latest f2fs-stable merged
    LA.UM.7.8.c3-06800-QCS605.0 merged
    LE.UM.3.2.1-18400-SDX24 merged
    Removed f2fs debug tracing codes added by Qualcomm
    qseecom performance improved
    Re-enabled kernel tracers for avoiding janks
    32-bit vDSO added for improving performance on arm32 programs
    Audio kernel updated LA.UM.7.3.r1-07800-sdm845.0

    r15b1
    Linux v4.9.175 merged
    Wi-Fi drivers updated to 5.1.1.71H
    Latest f2fs-stable merged
    LA.UM.7.3.r1-07400-sdm845.0 merged
    LA.UM.7.8.r3-01400-SDM710.0 merged
    Fixed a Qualcomm issue that prevented audio-app stune creation
    Fixed an improper timer operation in fuelguage driver causing battery statistics to not update until 20 minutes after boot
    Merged various patches from Proton kernel by kdrag0n to lower overheads and improve responsiveness (thanks to kdrag0n, sultanxda and ab123321)
    Applied various optimizations to the touch panel drivers
    Now VLA-free
    RCU boost enabled for better responsiveness
    New patches made to f2fs for more efficient GC and trim
    FBE(File Based Encryption) now works with f2fs

    r14
    Wi-Fi drivers updated to 5.1.1.71C
    Disabled some debugging options to improve performance
    Added vibration control
    Added wcd934x sound control

    r13
    Reverted a problematic Wi-Fi drivers optimization causing Wi-Fi to not turn on after some period of time

    r12
    Fixed a faulty memory region removal causing kernel panics
    (Thanks to @habylab for directly testing builds)

    r11
    Reverted a minor Wi-Fi drivers improvement causing kernel panics

    r10
    AnyKernel2 is now being used
    Linux v4.9.168 merged
    Fixed a major memory management regression
    Linux CMA pool size increased for better CMA efficiency
    Improved memory allocation from the Wi-Fi drivers to reduce memory fragmentation
    Fixed occasional kernel crashes(entering dumpmode) on shutdowns

    r9
    Linux v4.9.166 merged
    LE.UM.3.2.1-11600-SDX24 merged
    Use CONFIG_HZ = 300
    - This changes context switching interval from 10ms to 3.33ms
    - Pixel used this for years and Google recommends other vendors to do the same for fewer jitters
    Some changes from Pixel 3’s Q preview kernel
    Some mainline performance improvements to procfs merged
    Removed RTB(interrupt) logging entirely
    WireGuard updated to 20190227
    Stock LowMemoryKiller parameter restored to hopefully fix wake-up delay and general lags
    Fixed bq27541 fuelguage driver to properly work with CONFIG_HZ != 100
    (Fixes various battery-related issues such as displaying -22% on initial boot)
    Reverted a problematic memory management commit causing CMA allocation errors
    Merged LA.UM.7.8.r1-05000-SDM710.0
    Merged LA.UM.7.3.r1-06900-sdm845.0 audio kernel
    Various changes made to f2fs rapid GC to make it more efficient
    dirty_expire_centisecs set to 30 seconds to reduce flash wearouts and power consumption
    Various changes merged from the Razer Phone 2 and Snapdragon 855
    Kernel is now built with -O3 optimization flag

    r8
    Linux v4.9.163 merged
    LE.UM.3.2.1-08000-SDX24 merged
    Wi-Fi drivers updated to 5.1.1.70J
    f2fs updated to 5.1 mainline version
    Disabled qcom_rx_wakelock (details)
    Reworked msm_geni_serial driver
    - Lighter resource usage
    - Lower power consumption upon wake(ISR)
    - Fixed an issue preventing suspend indefinitely
    Various changes from Proton kernel by kdrag0n
    - Use flatmem to save kernel memory usage
    - Use optimized memcmp
    - Optimize rbtree
    - Disable erratum 843419 properly
    - Delay vmstat updating interval to avoid jitter
    - Disable I/O stat accounting completely for lower overheads
    - Reverted a cpuidle change for possible fix for power consumption regression during sleep
    - Faster crypto algorithms ported(chacha20, sha2, crc32)
    A bit lower power consumption by using WFE for long delays
    Add accelerated crc32 routines
    Use -O3 for input drivers for avoiding overheads

    r7
    Linux v4.9.160 merged
    LA.UM.7.3.r1-06900-sdm845.0 merged
    LA.UM.7.8.r1-04800-SDM710.0 Wi-Fi drivers merged
    A totally new kernel base merged - LE.UM.2.3.2-05800-SDX24
    - Total of 1153 commits and about 25,000 lines of code difference
    - A lot has changed ranging from scheduler, memory management, device encryption, GPU and panel handling, UFS device driver, ION, cpuidle, binder and a whole lot more
    OnePlus changes to OxygenOS 9.0.12 merged
    - This includes display panel changes and may affect screen on/off delays
    IRQ balancer settings updated to include UFS interrupts for better overall smoothness
    Some of upstream camera commits applied for more reliable camera operations
    Sultan’s display wake-up optimization re-applied after a bug fix revision

    1.5
    Linux v4.9.158 merged
    Kernel configuration fixed for proper scheduler operation
    OnePlus changes to display panel settings merged
    Faulty screen optimization from Sultan reverted to fix occasional screen-on misses
    Mainline f2fs fixes merged
    LA.UM.7.8.r3-01100-SDM710.0 merged
    - This new tag for Snapdragon 710 includes multiple enhancements over sdm845 tag, most notably scheduler improvements
    WireGuard updated to 20190123
    seccomp disabled in favor of less system-call overheads
    Minor issue with f2fs rapid GC fixed
    Fixed an issue with execprog causing readahead settings to be ignored on some boot
    Modified IRQ balancer settings added for better smoothness

    1.4
    Linux v4.9.154 merged
    ULPS during suspend disabled for (possibly)lower panel power consumption during screen-off
    Audio HAL reworked to fix Type C audio adapter (thanks to @Nezorflame for testing)
    Patch level set back to 2019-01

    1.3
    Linux v4.9.153 merged
    ZIP installation now uses proper security patch level to bypass SafetyNet
    (If you install the kernel by fastboot/IMG method, it won't bypass SafetyNet)
    Merged several changes from Sultan's Pixel 3 kernel
    - Numerous memory leaks fixed
    - GPU performance improved with corrected priority
    - Faster display wake-up
    - Lower power consumption

    1.2
    OnePlus 6T support added - thanks to freshgiammi and nezorflame for testing
    Security level is set to 2025-12(details)

    1.1
    CAF tag LA.UM.7.3.r1-06700-sdm845.0 merged
    Linux v4.9.151 merged
    Wi-Fi issue fixed (thanks to pappschlumpf for tipping me the culprit)
    pstore kernel log is now properly saved
    Custom TWRP integrated
    Readahead set to 128kB to minimize page thrashing
    IMG file is now provided for direct fastboot installation

    1.0
    Initial release
    15
    A new major update is up.
    Several changes with this release directly impacts daily UX.

    I'm not sure it's just me, but the "Instagram/Twitter lag" some users reported seems definitely better with this release.

    BTW, I'm fully aware of decryption on TWRP not working properly with OnePlus 6T. It's extremely cumbersome to work on this as I don't have an actual device. I'll keep this forum updated for progress on TWRP.

    1.5
    Linux v4.9.158 merged
    Kernel configuration fixed for proper scheduler operation
    OnePlus changes to display panel settings merged
    Faulty screen optimization from Sultan reverted to fix occasional screen-on misses
    Mainline f2fs fixes merged
    LA.UM.7.8.r3-01100-SDM710.0 merged
    - This new tag for Snapdragon 710 includes multiple enhancements over sdm845 tag, most notably scheduler improvements
    WireGuard updated to 20190123
    seccomp disabled in favor of less system-call overheads
    Minor issue with f2fs rapid GC fixed
    Fixed an issue with execprog causing readahead settings to be ignored on some boot
    Modified IRQ balancer settings added for better smoothness
    15
    New update is up!
    Most notable things in the changelog are in bold texts.

    Sidenote for those using f2fs:
    I've got a report that my f2fs conversion tools weren't applying appropriate optimizations.
    If you're using f2fs, just flash this zip from the recovery just to make sure you have up-to-date extensions list for f2fs.
    http://arter97.com/browse/f2fs/optimize

    r16
    Linux v4.9.180 merged
    Wi-Fi drivers replaced with Snapdragon 855 drivers
    - Switched from 5.1.1 to 5.2.03 release
    - 1810 files changed, 851191 insertions(+), 187458 deletions(-)
    - I've been internally using this for 3 weeks and noticed multiple improvements like faster handshakes and higher throughput without any issues
    Fixed several memory management issues from previous releases
    - This fixes multiple issues including performance regressions(wake-up delays, etc) and radio malfunctions
    - Thanks to @habylab for testing multiple builds prior to release)
    Latest f2fs-stable merged
    LA.UM.7.8.c3-06800-QCS605.0 merged
    LE.UM.3.2.1-18400-SDX24 merged
    Removed f2fs debug tracing codes added by Qualcomm
    qseecom performance improved
    Re-enabled kernel tracers for avoiding janks
    32-bit vDSO added for improving performance on arm32 programs
    Audio kernel updated LA.UM.7.3.r1-07800-sdm845.0