Development [Kernel][03.05.2022][Android 12.1.0][Android 12.1.0 QPR Beta 2] Kirisakura 2.4.0 for Pixel 6/Pro aka "RAVIOLE"

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Fields47

Member
Dec 24, 2010
22
6
Hey, thanks for the update. I just flashed 1.4.0 however I seem to have an issue with Bluetooth audio, I cant for the life of me to get audio to work on my car over bluetooth.

Could this be related to the Kernel or should I be looking at other possibilities?
 

izzyzz

New member
Jan 17, 2022
2
0
Yes it could be reduced further, but the lower it gets the more likely it gets to territory once entered where issues like stuttering during music playback etc could occur.
Oh i was asking because i dont play music and if it can be reduced lower to only need support for notifications
 

Freak07

Recognized Developer / Recognized Contributor
Jan 2, 2011
5,535
18,334
Hey, thanks for the update. I just flashed 1.4.0 however I seem to have an issue with Bluetooth audio, I cant for the life of me to get audio to work on my car over bluetooth.

Could this be related to the Kernel or should I be looking at other possibilities.
It could be related. Did you flash 1.4.0 on January or is that a typo?

1.4.0 was for December, 1.5.0 is for January.

I have a few Bluetooth devices (although no car that has Bluetooth) and all of those devices work fine on my end. Tried also pairing new devices.

You can try to reboot, make sure you're running the correct kernel for the correct firmware build and if that doesn't work try to restore stock kernel and see if that changes anything.

If it's related to anything I changed, i might need logs to do anything.


edit: I just googled bluetooth issues on cars with the pixel 6, there seem to be a lot of complaints too.

Oh i was asking because i dont play music and if it can be reduced lower to only need support for notifications
I can't decrease it for everyone as that won't work.
If you're interested how to change it yourself pm me, I'll write you a short explanation.
 
Last edited:

omvir

Senior Member
Apr 28, 2011
1,230
528
Thank you for your kernel.

I no longer need to install the p6 powerhint module along with the kernel zip (1.5.0) as it now comes bundled already with the flashable zip. Correct?
 

danw_oz

Senior Member
Jul 12, 2011
1,405
371
Brisbane
If you want to get rid of the "corrupted" message, then yes (I just re-installed the factory image with a wipe since I hadn't set up the phone yet after retruning from protonAOSP, and I had already wiped and backed up my phone). The same thing happened to me when I tried installing the kernel a few days ago when it was first released.

I haven't tried flashing it again through EXKM as I haven't really had time in case the same thing happens again.
On Jan build with latest canary build of Magisk, flashed powerhint in Magisk first, then flashed 1.5.0 with EXKM no problem.
 

rav101

Senior Member
Dec 1, 2013
2,407
1,376
Walsall
Google Pixel 6 Pro
On Jan build with latest canary build of Magisk, flashed powerhint in Magisk first, then flashed 1.5.0 with EXKM no problem.
Just a heads up that you don't need to flash the powerhint module anymore as it comes bundled in the Zip and will automatically be installed when flashing in EXKM. The name is different now (it's called "AK3 Helper Module".

Remove the old powerhint module if you still have it installed.
 

danw_oz

Senior Member
Jul 12, 2011
1,405
371
Brisbane
Just a heads up that you don't need to flash the powerhint module anymore as it comes bundled in the Zip and will automatically be installed when flashing in EXKM. The name is different now (it's called "AK3 Helper Module".

Remove the old powerhint module if you still have it installed.
Ok thanks for the heads up, was being super careful this time, and had read it was a requirement. Will remove it and flash kernel again
 
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Freak07

Recognized Developer / Recognized Contributor
Jan 2, 2011
5,535
18,334
I just flashed the 1.5.0 zip again and everything went fine.

I don't know what caused it to boot loop the last time I flashed it.
Thanks for the report. Maybe there´s a flag in the ak3 kernel.zip I´m missing.

I flashed numerous test builds and didn´t run into any issue so far. It´s always tedious to debug or tackle issues one doesn´t run into. I´ll take a look for the next release if that flags potentially might solve this issue.

Ok thanks for the heads up, was being super careful this time, and had read it was a requirement. Will remove it and flash kernel again
Where did you read that it was a requirement?

I adjusted the flashing guide in the first post for flashing the kernel.zip, but it would be nice to know if I missed a reference somewhere.

@Freak07 Can't thank you enough for such an amazing kernel! Originally bought a OnePlus 7 Pro as I was so intrigued by your kernel, and am so excited that you are developing for the Pixel 6 Pro. Greatly appreciate all of the detail and information you put into all of your posts and changelogs :) Thank you for everything you do!
Glad to hear :) Enjoy the ride!
 

Nekromantik

Senior Member
Apr 1, 2010
6,723
931
London
Google Pixel 6 Pro
Or even better: Don´t create a thread to compare ROMs/Kernels or other projects at all.
I don´t understand why there´s the urge to constantly compare projects as if there was some kind of competition. Use what suits you best and be happy it´s available.
That's what I'd prefer.
If one is not satisfied about what's available they might even start to get into starting a simple first project themselves.

The XDA I know from back in the days when I was just a user, when I was not contributing anything in form of a development project because I simply lacked any knowledge and was instead just a mostly lurking and learning user, had a few unspoken rules that included to not do exactly this. (create "comparison" threads)
Yes I agree.
 

Nightf0x_007

Senior Member
Nov 5, 2012
673
72
Updated my pixel 6 to january update and flashed kirisaukra 1.5.0 via fkm my device bootlooped and now getting when rebooting a warning my device is corrupted before the bootloader unlocked warning
 
Last edited:

Freak07

Recognized Developer / Recognized Contributor
Jan 2, 2011
5,535
18,334
Updated my pixel 6 to january update and flashed kirisaukra 1.5.0 via fkm my device bootlooped and now getting when rebooting a warning my device is corrupted before the bootloader unlocked warning

Same thing happened to me.

So it seems it´s not related to the app you both used for flashing. @Gordietm used exkm, while @Nightf0x_007 used fkm.

Since it seems the majority of people have no issues flashing the kernel.zip, me included, there must be something that triggers an issue.

Are you 100% sure that you came from a clean stock firmware rooted with 23016 magisk canary, where you extracted the january boot.img yourself from the firmware you previously flashed, patched it yourself with magisk canary 23016 and flashed it successfully via fastboot?

Did you flash any other kernel before? Was there anything strange when updating? Did you update to January firmware with vbmeta verity flags disabled or left them enabled?

a few posts above another user, seemed to have a similar problem, which wasn´t reproducible and fixed on a second attempt:
 

Nightf0x_007

Senior Member
Nov 5, 2012
673
72
I was rooted on dec. Update with kernel v.1.40, i remember before going from nov. To dec. I disabled both dm verity & verification (i flashed dec. Update via android flash tool website), thats it all, i feel something went wrong in my device
This is how i updated to dec.
-Executed flash-all flashed bootloader & radio but didnt want to update the device
- fastboot update the image
- fastboot boot magisk patched image
- opened magisk and directly installed magisk
 
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  • 3
    Can I use your modified vendor_dlkm and vbmeta images for the May update to flash them to my Pixel 6 Pro?

    If I understand thing correctly, this would like me Flash Kiri 2.4 without wiping my phone.
    I'm on Pixel 6 (oriole, not Pro), so mine will be different from yours. I'll try to package up my workaround in the next few days to make it a bit easier to apply, assuming I can generate the hashtree on-device.
    2
    My employer recently made us switch to Microsoft authenticated apps on our mobile devices. After hiding Magisk stable 24300 and denying all the Microsoft apps, I was able to run programs like Outlook and Team without root being detected. I had the initial 2.4 kernel running too.

    Today, those app started to detect root and would not run. I dont know what changed to cause root to get detected.

    I upgraded to Magisk Canary 24313 and can hide root from those apps again. Unfortunately, I when I tried to flash original Kiri 2.4, the Google logo just appeared and then went out.

    Are there any workarounds to get this kernel running with Magisk Canary 24313? Is there a test version of the kernel that might work with Magisk Canary?

    thanks,
    Try magisk stable with the kernel zip attached to this post:

    If you disabled verity/verification vbmeta flags you will have no trouble using magisk canary. If your vbmeta flags are enabled canary will not work as far as I'm aware.
    2
    I upgraded to Magisk Canary 24313 and can hide root from those apps again. Unfortunately, I when I tried to flash original Kiri 2.4, the Google logo just appeared and then went out.

    If you disabled verity/verification vbmeta flags you will have no trouble using magisk canary. If your vbmeta flags are enabled canary will not work as far as I'm aware.

    The issue is Magisk no longer strips the avb key from fstab entries, so if you don't have verity disabled, when the system tries to mount vendor_dlkm, it looks for the hashtree described in vbmeta, but it doesn't exist, and even if it did, it would no longer match the the descriptor.

    I posted a workaround on the issue in the Magisk repo, but it currently isn't trivial to apply. Unless there's some way to modify the fstab entries from within the kernel, it seems we'll be forced to either disable verity or patch vendor_dlkm (though I suppose it could be shipped with the hashtree already appended) and vbmeta.

    The upside is patching the hashtree descriptor in vbmeta does not require you to wipe your data.
  • 34
    Update to 2.4.0

    Hey guys and girls,


    Alright here´s the next update and it´s fine to flash on May firmware. As I suspected we already had all the changes for May by merging upstream.
    I´ll include the changelog from 2.3.0 as well in this release post, since I think a lot of people flash the kernel on a monthly basis when the security updates drop. So this post pictures the changes going from 2.1.0 to 2.3.0! As I said 2.3.0 was kind of a final rehearsal to make sure everything is good for the May update.
    I´ll put a remark behind changes going from 2.3.0 to 2.4.0.
    This release is made for stable Android 12.1.0 May firmware. Not QPR Beta or A13 Beta!
    Once I find enough time or QPR beta gets updated, I might update the QPR beta release. No plans to support A13 beta.

    I also finished up the tables/graphs in regards to different binnings with the respective voltages on different tensor chips thanks to the dmesgs you all provided. I really want to put out a big thanks here to everyone for taking the time and participating. It was really great to see this kind of response.
    I´ll provide them in a post in this thread soon.
    So with that in mind we´ll get to the next paragraph were I could put those tables to good use.

    A few changes from A13 Beta are merged to the kernel so we can enjoy the improvements on A12 ahead of time. Most of them aim to improve the scheduler and task placement.

    However the recently dropped A13 Beta source contains a commit that can restrict max-cpufreqs based on PMU (Power monitor unit) reading. I setup this mechanism (lets call it "PMU Limiter") to mildly cut back max-freqs when they aren´t needed. It works quite well so far, with no performance impacts during scenarios where max cpufreq is beneficial. (e.g. app launching, camera launching, interaction etcetc)
    That means if a certain threshold is not crossed the max-freqs will be restricted to 1,4GHZ/1,6GHZ/2,4GHZ (for little/mid/big cores). As soon as the PMU detects enough pressure, those limits will be lifted.
    The frequency limits are based on tracing during various scenarios, benchmarking and also factor in the voltage table I was able to create. For example: 2.4GHZ for the big cores is the last freq step where a steady linear increase in voltage can be seen. Freq steps higher than 2,4ghz have a steeper slope.
    Keep in mind CPU-Freqs shouldn´t be touched in EXKM/FKM or other kernel managers. They are controlled by various mechanisms now (thermal hal, powerhal, pmu limiter etc) and values will get overwritten based on input.
    That means if you open the CPU section in a kernel manager, the maxfreqs will not be the actual maxfreqs that are possible. or the minfreqs might be raised. That´s normal and there´s nothing wrong if that´s the case.

    Additionally to the previous changes tasks of rt, sf and ta groups are now biased to start on high capacity CPUs during app launches, interactions etc.
    As usual, depending on your usage you may or may not notice a difference during these scenarios. :)

    While tracing I noticed kswapd often takes 100% cpu share when reclamation is happening. Since we use an 8 core cpu, an additional kswapd thread is being spawned during boot, which increases throughput for kswapd in these scenarios. Reasoning behind this can be found here.

    The trusty driver which connects to the fingerprintreader hal uses now a high prio workqueue when the phone is unlocked via fingerprint scanner. This means better performance, especially under stress. Keep in mind this is a kernel level change, it won´t magically improve fingerprint reader times manifold.

    DAMON and DAMON-Reclaim were removed from 2.3.0 going to 2.4.0. I tested the feature privately and it unfortunately collides with googles EH zram implementation causing the phone to crash at the moment. Tried to debug this issue, but no luck for the May release here.
    If you previously enabled the feature without adjusting the parameters properly and your phone didn´t crash, DAMON-Reclaim just didn´t do anything.

    2.4.0 also has an updated anykernel3.zip, which includes all the latest anykernel3 changes.
    Thanks to @capntrips we now have full support to resize vendor_dlkm partition which is part of the super partition. That means we finally can flash larger than stock vendor_dlkm partitions via anykernel3.zips and resize the partition properly instead of just dd´ing to it.
    A huge thanks to @capntrips for working on this and to @osm0sis for maintaining anykernel3.


    Disclaimer:
    I´ll keep the warning as to preferably using magisk stable to avoid potential issues as well here in this post.
    Please note that 24306 works fine for me though on non beta, stable May firmware!
    Important:
    Make sure you´re being rooted with magisk 24300 stable before flashing the kernel if you´re unsure. Any magisk version above 24303 might potentially lead to a reboot back to bootloader since android 12.1.0 and A12L QPR3 Beta. At the moment this only affects canary, but I put the warning just in case this will not get resolved in upstream magisk in time until the next stable drops. I saw a post that some modules also have problems with latest canary, so there´s a lot going on at magisk´s side at the moment.
    A post containing a short write-up how to "downgrade" magisk can be found following this link.

    If you´re one of the unfortunate ones that suffer from the device is corrupt bug on pixel 6 series please take a look at the FAQ at the beginning of this thread it contains a solution. The issue is probably caused by a bug that affects pixel 6 devices and has nothing to do with magisk or a kernel, it just happens to get triggered when using any of those.



    Changelog:

    - Linux-stable merged to 5.10.113
    - Use prebuilt Google Clang 14.0.5 for compilation
    - Utilize an additional kswapd thread to increase throughput for memory reclaim
    - remove DAMON and DAMON-Reclaim from kernel build (2.4.0)
    - improve trusty driver performance which connects to fingerprintscanner-hal by using high prio wq during fp unlock (2.4.0)
    - mm improvements from kernel/common (2.4.0)
    - improvements from kernel-common a13 to page_pinner
    - mainline backports for BFQ scheduler
    - rework Multi-Gen LRU implementation
    - scheduler improvements for RT (realtime) tasks
    - other scheduler improvements
    - include scheduler improvements from A13 Beta regarding better task placement
    - introduce and setup PMU limiter (prevents CPU from spiking to max when it isn´t needed, based on PMU reads)
    - bias tasks of rt, sf and ta groups to prefer high capacity cpus during app launches, interactions, camera launches, etc
    - updated anykernel3.zip (thanks to @osm0sis) -> adds full support for resizing vendor_dlkm ( huge thanks to @capntrips )



    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues and read this post carefully. Don´t use magisk canary 24303 or more recent to avoid potential issues!
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.

    I wish everybody a great day/evening!
    Have fun, enjoy the kernel and your phone.


    If you like my work please consider a donation.
    Donations are not mandatory but very welcome.
    If you like my work and want to buy me a coffee/green tea: http://paypal.me/freak07
    29
    Update to 2.3.0

    Hey guys and girls,


    Alright here´s the next update. It´s a major one. I want to put it out shortly before we hopefully receive the next monthly security update on Monday kinda as a final rehearsal.
    This kernel is made for stable Android 12.1.0 April firmware. Not QPR Beta or A13 Beta!
    Once I find enough time or QPR beta gets updated, I might update the QPR beta release. No plans to support A13 beta.

    A few changes from A13 Beta are merged to the kernel so we can enjoy the improvements on A12 already. Most of them aim to improve the scheduler and task placement.
    A13 Beta source contains a commit that can restrict max-cpufreqs based on PMU reading. I setup this mechanism to mildly cut back max-freqs when they aren´t needed. It works quite well so far, with no performance impacts during scenarios where max cpufreq is beneficial. (e.g. app launching, camera launching etc)
    Tasks of rt, sf and ta groups are now biased to start on high capacity CPUs during app launches, interactions etc.
    As usual, depending on your usage you may or may not notice a difference during these scenarios. :)

    While tracing I noticed kswapd often takes 100% cpu share when reclamation is happening. Since we use an 8 core cpu, an additional kswapd thread is being spawned during boot, which increases throughput for kswapd in these scenarios.

    DAMON patch-series is included to this release as it was merged to kernel/common. It includes DAMON-reclaim. You can read more about it here.
    This feature is currently disabled by default on this kernel. If you want to use it you can tune it to your liking as per the documentation linked above.
    The feature can be enabled via:
    Code:
    echo 1 > /sys/module/damon_reclaim/parameters/enabled
    I think Google might start to use it in the not so far future, but for now it´s disabled by default.


    Disclaimer:
    I´ll keep the warning as to preferably using magisk stable to avoid potential issues as well here in this post.
    Please note that 24306 works fine for me though on non beta, stable April firmware!
    Important:
    Make sure you´re being rooted with magisk 24300 stable before flashing the kernel if you´re unsure. Any magisk version above 24303 might potentially lead to a reboot back to bootloader since android 12.1.0 and A12L QPR3 Beta. At the moment this only affects canary, but I put the warning just in case this will not get resolved in upstream magisk in time until the next stable drops. I saw a post that some modules also have problems with latest canary, so there´s a lot going on at magisk´s side at the moment.
    A post containing a short write-up how to "downgrade" magisk can be found following this link.

    If you´re one of the unfortunate ones that suffer from the device is corrupt bug on pixel 6 series please take a look at the FAQ at the beginning of this thread it contains a solution. The issue is probably caused by a bug that affects pixel 6 devices and has nothing to do with magisk or a kernel, it just happens to get triggered when using any of those.



    Changelog:

    - Linux-stable merged to 5.10.113
    - Use prebuilt Google Clang 14.0.5 for compilation
    - Utilize an additional kswapd thread to increase throughput for memory reclaim
    - improvements from kernel-common a13 to page_pinner
    - mainline backports for BFQ scheduler
    - rework Multi-Gen LRU implementation
    - merge DAMON to the kernel, which includes DAMON-Reclaim (this feature is not enabled by default, you need to enable it manually if you want to test)
    - scheduler improvements for RT (realtime) tasks
    - other scheduler improvements
    - include scheduler improvements from A13 Beta regarding better task placement
    - introduce and setup PMU limiter (prevents CPU from spiking to max when it isn´t needed, based on PMU reads)
    - bias tasks of rt, sf and ta groups to prefer high capacity cpus during app launches, interactions, camera launches, etc



    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues and read this post carefully. Don´t use magisk canary 24303 or more recent to avoid potential issues!
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.

    I wish everybody a great day/evening!
    Have fun, enjoy the kernel and your phone.


    If you like my work please consider a donation.
    Donations are not mandatory but very welcome.
    If you like my work and want to buy me a coffee/green tea: http://paypal.me/freak07
    25
    May update is out. :)

    no source update pushed from google yet. I guess it´ll happen in a few hours when I´ll be asleep.
    I went ahead and flashed the latest release for stable 12.1.0 without any issues so far.

    If you can´t wait, it should be fine to flash based on that short experience.

    If you want to be absolutely sure there will be no issues due to incompatible source/firmware, I´ll try to update the kernel with any new potential changes in the source for May as soon as I find time, which will hopefully/probably be tomorrow if everything goes as expected. :)

    I wish everybody a great day/evening.
    19
    The app is Crédit Mutuel

    And yes, you just gotta get to the actual log-in screen after accepting the conditions and cookies. At the log-in screen there will be a red warning that root has been detected.

    Thanks!
    Managed to reproduce the issue. It´s a magisk issue that surfaces probably since 2.0.1 where direct USB access was added and was not kernel related.
    To get direct USB access working a firmware file in vendor/firmware is replaced during bootup when my kernel is flashed, which is required for the kernel changes to actually work.
    The denylist trick to hide modifications stumbles upon that dir and fails due to a selinux error as denylist is not allowed to access that dir.
    As a workaround I fixed that selinux denial and root is no longer being detected by the app. :)

    Code:
    05-08 08:45:40.268   778   778 D Zygote  : Forked child process 18269
    05-08 08:45:40.269  3697  5245 I AssistantForeground: Get launcher package: com.google.android.apps.nexuslauncher
    05-08 08:45:40.269  1579  1769 I ActivityManager: Start proc 18269:com.cm_prod.bad/u0a313 for pre-top-activity {com.cm_prod.bad/com.e_i.bad.controls.activities.StartActivity}
    05-08 08:45:40.271 18269 18269 I Magisk  : zygisk64: [com.cm_prod.bad] is on the denylist
    05-08 08:45:40.274 18269 18269 D Magisk  : denylist: Unmounted (/system/bin/magiskpolicy)
    05-08 08:45:40.274 18269 18269 D Magisk  : denylist: Unmounted (/system/bin/magisk)
    05-08 08:45:40.274 18269 18269 D Magisk  : denylist: Unmounted (/system/bin/app_process64)
    05-08 08:45:40.274 18269 18269 D Magisk  : denylist: Unmounted (/system/bin/app_process32)
    05-08 08:45:40.275 18269 18269 D Magisk  : denylist: Unmounted (/system/bin)
    05-08 08:45:40.275 18269 18269 D Magisk  : denylist: Unmounted (/product/overlay)
    05-08 08:45:40.272 18269 18269 W main    : type=1400 audit(0.0:1514): avc: denied { search } for name="firmware" dev="dm-4" ino=722 scontext=u:r:zygote:s0 tcontext=u:object_r:vendor_fw_file:s0 tclass=dir permissive=0
    05-08 08:45:40.276 18269 18269 D Magisk  : denylist: Unmounted (/dev/G8MMn)
    05-08 08:45:40.277 18269 18269 D Magisk  : denylist: Unmounted (/system/etc/hosts)
    05-08 08:45:40.277 18269 18269 D Magisk  : denylist: Unmounted (/system/app/Stk)
    05-08 08:45:40.277 18269 18269 D Magisk  : denylist: Unmounted (/vendor/etc/powerhint.json)

    After flashing the updated zip what I did was hide the magisk app in magisk manager, enable deny list and added the app to the list. Wipe data of the banking app, reboot (not sure if needed but rebooting is always good in these cases) and root was no longer detected by the app.

    Attached are zips which include the fix the selinux denial for you to confirm.

    This might also fix root detection by other banking apps that are not detecting root on stock kernel, but were broken after flashing the few last releases of this kernel.
    11
    A12L QPR Beta Kernel

    For those on the A12L QPR Beta 3 here are zips to try. They are only supposed to be flashed on Android 12 QPR Beta!
    They should work fine on QPR Beta 3 as source was pushed already, merged and I have confirmation it´s working fine on Beta 3.
    That kernel has feature parity with the 2.4.0. So for a detailed changelog please refer to the release post of 2.4.0.


    I don´t know what´s the current situation with magisk and flashing kernels on QPR Beta, but it´s probably best to use magisk stable if you don´t want to face issues. (although I have confirmation magisk canary 24307 works fine with verity/verification disabled, don´t know about vbmeta enabled)
    I´m not myself on QPR Beta so please leave feedback, but remember:
    These zips are provided as is I don´t have time to flash between stable and QPR
    Feel free to report issues with proper bug reports (containing logs, steps to reproduce according to the guide linked in the FAQ), but they might remain unresolved if it´s not easy to fix without running A12L Beta on my own end.


    I wish everybody a great weekend!
    Have fun, enjoy the kernel and your phone.


    If you like my work please consider a donation.
    Donations are not mandatory but very welcome.
    If you like my work and want to buy me a coffee/green tea: http://paypal.me/freak07
  • 98
    Kirisakura-Kernel for the Pixel 6/Pro

    Hello everyone,

    To keep it short: Here is Kirisakura - Kernel for the Google Pixel 6 Pro aka Raven and the Pixel 6 aka Oriole, together Raviole.
    I would appreciate if everybody that flashes the kernel, reads at least once through this opening post and the following ones.

    The kernel aims to keep most of the subsystems updated, way ahead of the stock kernel, thereby improving security, stability and performance!
    This includes Linux-Stable, F2FS-Stable and kernel/common!
    If that got you curious,have a read about linux-stable and why it is important here. The stable-process is not the same for every subsystem, but the general idea, rule of thumb and benefits are applicable for other subsystems as well.

    The kernel includes a lot of improvements and contributions from other developers as well. Without this kernel would not exist.
    A big part of improvements originate from @arter97´s, @kdrag0n´s and @Sultanxda´s work. Many others contributed in some way or another to this kernel.
    A big thanks to all of them at this place!

    Now lets continue with a list of features in the next paragraph!

    Features:
    Main Features:
    - Based on latest kernel sources from Google, Kernel is made for Android 12
    - Linux-Stable-Upstream included to 5.10.113
    - Compiled with prebuilt Google clang 14.0.5
    - merged kernel/common (improvements to android-common-kernel straight from google)
    - Multi-gen LRU backported (more info here, here as well and here) to improve mm and reduce cpu cycles
    - Utilize an additional kswapd thread to increase throughput for memory reclaim
    - pelt multiplier tied into powerhal to speed up scheduler during interaction (more info here)
    - prevent frequency spikes caused by small transient tasks when the device is idle(more info here)
    - tie mechanism to prevent frequency spikes caused by small tasks also into powerhal
    - scheduler improvements for RT (realtime) tasks
    - introduce and setup PMU limiter (prevents CPU from spiking to max when it isn´t needed, based on PMU reads)
    - improve camera performance by tuning the powerhal during recording
    - bias tasks of rt, sf and ta groups to prefer high capacity cpus during app launches, interactions
    - improve app launches via powerhal
    - improve trusty driver performance which connects to fingerprintscanner-hal by using high perf wq during fp unlock
    - restrict maximum CPU-Freqs during screen off/ idle to 1.1GHZ for all clusters to save power
    - introduce unfair f2fs rwsems to prevent writer starvation and improve IO perf under heavy load
    - fuse: give wakeup hints to scheduler to speed up compress/decompress in internal storage (details)
    - enable RCU_BOOST (details here), also fix RCU_BOOST behaviour
    - F2FS-Stable updated
    - TCP backports from mainline
    - BFQ updates backported from mainline
    - use bbr as default TCP congestion algorithm (fasted algo according to this excellent research from @kdrag0n found here )
    - Enable support for TTL spoofing
    - Include LRNG, see here and here for more info (thanks @arter97 for the work on his op9 kernel)
    - important patches from kernel/common for 5.10 (here are more details)
    - CleanSlate Features from @tbalden, big applause here! (s2s, notification booster, battery saver, flashlight notifications. Please note: cleanslate features that work otherwise with rooted devices like kadaway (adblocking) are not implemented on this kernel since I´m running rooted)
    - dirty pipe exploit fixed
    - supports direct usb access for hi-res playback over USB-C DACs
    - flashing the kernel will preserve root

    Various Optimizations:
    - update several drivers to use power efficient workingqueues (for example wlan driver)
    - kernfs: use buffer from the stack space
    - printk: use buffer from the stack space
    - kthread: use buffer from the stack space
    - bpf: avoid dynamic memory allocation for small value buffers
    - binder: Reserve caches for small, high-frequency memory allocations
    - kernfs: use kmem_cache pool for struct kernfs_open_node/file
    - cgroup: use kmem_cache pool for struct cgrp_cset_link
    - f2fs: reduce timeout for uncongestion
    - f2fs: Demote GC thread to idle scheduler class
    - f2fs: set ioprio of GC kthread to idle
    - mm: vmstat: use power efficient workingqueues
    Wakelock Blocker:
    - advanced wakelock blocker with the ability to block any wakelocks (dangerous, use with caution)
    - please read [URL="https://arstechnica.com/gadgets/2018/08/p-is-for-power-how-google-tests-tracks-and-improves-android-battery-life/"]this for further info

    AK3 Helper Module:
    - restrict little cluster to 1,19ghz mid cluster to 1,19ghz and big cluster to 1,1ghz during screen off, to reduce battery usage for example during music playback
    - tie pelt multiplier into the powerhal (more info here)
    - prevent frequency spikes caused by small transient tasks during idle operation (more info here)
    - boost scheduler using the pelt multiplier during fingerprint unlock operation

    DOWNLOAD:
    Download is always located in this folder:

    Changelog:
    Android 12.0.0

    1.0.0 Initial Release
    1.0.2 https://forum.xda-developers.com/t/...r-pixel-6-pro-aka-raven.4358435/post-85910621
    1.0.5 https://forum.xda-developers.com/t/...r-pixel-6-pro-aka-raven.4358435/post-85924419
    1.3.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-85976139
    1.4.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86109665
    1.5.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86259863
    1.7.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86390563
    1.8.4 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86541727

    Android 12.1.0 Stable (March feature drop and more recent)
    2.0.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86617873
    2.0.1 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86637233
    2.1.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86695911
    2.3.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86821331
    2.4.0 https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86834981

    Android 12L QPR Beta
    Build for Android 12 QPR Beta: https://forum.xda-developers.com/t/...pixel-6-pro-aka-raviole.4358435/post-86857033

    Requirements

    - unlocked Bootloader
    - USB-Debugging in developer options enabled
    - latest adb and fastboot binaries
    - working adb and fastboot environment so you can flash back to stock in case something goes wrong
    - working magisk environment (a device rooted with latest magisk stable in case you want to be absolutely safe, magisk 24303 and higher will bootloop on QPR beta and might act up on stable A12.1.0 too!)


    How to flash the Kernel:
    1a. Make sure you tick all the requirements above
    1. Download the correct kernel.zip depending on your device (Pixel 6 = oriole || Pixel 6 Pro = raven)
    (if you´re for whatever reason on November firmware -> use 1.3.0! More recent kernel releases will bootloop)
    2. Flash the correct kernel.zip via EXKM or FKM. Root will be preserved. The AK3 magisk helper module will be automatically installed during flashing the kernel.zip and be present on next reboot.
    Do not remove or disable the AK3 Magisk Helper Module otherwise the device will bootloop.
    3. Reboot and profit.

    Manual installation without relying on paid apps like fkm/exkm:
    Please have a look at the linked post.



    Donations:
    Donations are not mandatory but very welcome if you want to support development or just buy me a coffee/tea/beer :)
    If you like my work: http://paypal.me/freak07

    Credits:
    @osm0sis for all his work on AK3.
    @tbalden for being the best HTC, Pixel, OnePlus and Asus wingman!
    @LeeDroid and @mwilky for their awesome roms and work I used on multiple devices!
    @Captain_Throwback for all the mentoring and guidance!
    @Eliminater74 for bringing me into the game and the Inspiration
    @nathanchance for his upstream guidance and assistance
    @RenderBroken for helping me out
    @flar2 for all his work
    @joshuous for all the help he provided to me in the past!
    @arter97 for giving me advice
    @kdrag0n for his help and advices!
    @topjohnwu for magisk and his entire work!


    Source Code: https://github.com/freak07/Kirisakura_Raviole
    37
    Update to 1.8.4

    Hey guys and girls,


    So here´s the next update. It´s kind of an off schedule update, as I planned to update the kernel with the next security update/feature drop.

    But in the light of recent events regarding the new exploit called "Dirty Pipe" (more info here), which is similar to the "Dirty Cow" exploit from a while ago, but easier to exploit this time, I decided to release an update ahead of schedule.

    This exploit was fixed in linux-stable 5.10.102, as opposed to a single commit in AKC (android kernel common, commit here). This shows once more why merging linux-stable is beneficial as explained in detail in the OP.

    Since one of the key aspects of this kernel is security and staying on par with upstream (which often fixes exploits way ahead of android security bulletin updates, even before an exploit is even known or fixed via a patch on the security bulletin) I decided to release this update as quickly as possible, so this exploit is fixed on devices running this kernel.

    Several other notable improvements and changes in this release:
    Bring in scheduler updates from Android 13 Developer Preview, which aim at improving task placement. (adjust powerhal accordingly)
    BFQ IO-Sched is now on par with linux-mainline.
    Several fixes to mm subsystem, f2fs and others.

    Several other improvements are included as well. More details in the changelog.
    Download is below.
    Updated instructions in the OP!


    Changelog:
    - linux-stable 5.10.103
    - contains fix for the dirty pipe exploit
    - built with clang 14.0.2 prebuilt by google
    - improvments from kernel/common
    - fix memory leaks
    - security related patches
    - mm improvments
    - f2fs fixes
    - scheduler fixes
    - for details please check github
    - built with improvements from A13 Dev Preview to display driver
    - other changes please look at my github


    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues.
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.
    37
    Update to 1.7.0

    Hey guys and girls,


    So here´s the next update. It includes the february security update. Most of the changes brought by the February kernel source drop, were already included in this kernel by merging kernel/common and linux-stable.


    Several other notable improvements and changes in this release:
    Improve f2fs performance by merging a patchset to prevent writer starvation for the checkpoint thread. This was discussed this month in the f2fs mailing list and is already merged to the kernel/common tree. It´ll improve performance under heavy I/O utilization.
    You can find more information following the discussion here.
    Necessary backports were brought to the kernel and the platform specific f2fs-implementation was also adjusted.
    Latest f2fs-stable was also merged to the kernel.

    Update the patchset to prevent frequency spikes caused by small tasks as well. Tie those new changes into the powerhal. (That means users not flashing the kernel.zip, but instead use the manual installation method, which are only a handful from the download count, need to flash the updated magisk helper module. Users that flash the kernel.zip via FKM/EXKM have to just flash and forget)

    Several other improvements are included as well. More details in the changelog.
    Download is below.
    Updated instructions in the OP!


    Changelog:
    - February Security update merged
    - linux-stable 5.10.96
    - include latest f2fs-stable
    - improvments from kernel/common
    - fix memory leaks
    - security related patches
    - mm improvments
    - for details please check github
    - introduce unfair f2fs rwsems to prevent writer starvation and improve IO perf
    - update patchset to prevent freq spikes caused by small transient tasks (also tie this into powerhal)
    - give pelt multiplier power hint for scheduler performance boost during fingerprint unlock
    - fuse: give wakeup hints to scheduler to speed up compress/decompress in internal storage (details)
    - enable RCU_BOOST (details here), also fix RCU_BOOST behaviour
    - update LRNG implementation (thanks to arter97 )
    - improvements/fixes for CleanSlate features
    - other changes please look at my github


    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues.
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.
    36
    Update to 2.1.0

    Hey guys and girls,


    Alright here´s the next update. And it´s again a really big update! :)
    A few weeks ago google pushed a backport of Multi-Gen LRU for the 5.15 kernel to their aosp/kernel common branches. I went ahead and backported that to our 5.10 tree alongside other mm-improvements from linux-mainline. By now google pushed their own backport for 5.10, but I decided to go with my original implementation as it contains a lot more improvements alongside the main Multi-Gen LRU backport and ran stable for well over 3 weeks.

    Powerhal was adjusted quite significantly too. CPU-freqs are restricted to 1.1GHZ max during screen off/device idle operations to save more power. App launches and camera operation are improved as well in the powerhal. General usage benefits from those changes too.

    Latest linux-stable, f2fs-stable and kernel/common were merged as well.

    Users that decide to not use the CleanSlate features and don´t install the apps won´t see the kernel parsing for the config files extensively.
    Vibration Booster from CleanSlate was improved as well to kind of counter the weaker haptic feedback since the March update. Please check the linked thread from the changelog. Huge thanks to @tbalden for this. If you want to give a little bit back consider purchasing the apps via playstore or maybe a small donation. :)



    I´ll keep the warning as to preferably using magisk stable to avoid potential issues as well here in this post.
    Please note that 24305 works fine for me though on non beta, stable April firmware!
    Important:
    Make sure you´re being rooted with magisk 24300 stable before flashing the kernel if you´re unsure. Any magisk version above 24303 might potentially lead to a reboot back to bootloader since android 12.1.0 and A12L QPR3 Beta. At the moment this only affects canary, but I put the warning just in case this will not get resolved in upstream magisk in time until the next stable drops. I saw a post that some modules also have problems with latest canary, so there´s a lot going on at magisk´s side at the moment.
    A post containing a short write-up how to "downgrade" magisk can be found following this link.



    Changelog:

    - Update for April Source
    - Linux-stable merged to 5.10.109
    - f2fs-stable merged
    - fixes and improvements from kernel/common including several subsystems
    - multi-gen LRU ( more info here, here as well and here)
    - general LRU improvements from Linux-Mainline
    - improve camera performance by tuning the powerhal during recording
    - improve app launches via powerhal
    - restrict maximum CPU-Freqs during screen off/ idle to 1.1GHZ for all clusters to save power
    - remove cleanslate config files getting parsed excessively even if user did not install the CleanSlate apps
    - improve vibration boosting feature in CleanSlate config app to allow stronger vibration again(please have a look at this post )
    - other fixes for CleanSlate features such as sweep to sleep
    - updated anykernel 3 zip, thanks to @osm0sis
    - probably a lot more I forgot as time is short for me.


    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues and read this post carefully. Don´t use magisk canary 24303 or more recent to avoid potential issues!
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.

    I wish everybody a great day/evening!
    Have fun, enjoy the kernel and your phone.


    If you like my work please consider a donation.
    Donations are not mandatory but very welcome.
    If you like my work and want to buy me a coffee/green tea: http://paypal.me/freak07
    34
    Update to 2.4.0

    Hey guys and girls,


    Alright here´s the next update and it´s fine to flash on May firmware. As I suspected we already had all the changes for May by merging upstream.
    I´ll include the changelog from 2.3.0 as well in this release post, since I think a lot of people flash the kernel on a monthly basis when the security updates drop. So this post pictures the changes going from 2.1.0 to 2.3.0! As I said 2.3.0 was kind of a final rehearsal to make sure everything is good for the May update.
    I´ll put a remark behind changes going from 2.3.0 to 2.4.0.
    This release is made for stable Android 12.1.0 May firmware. Not QPR Beta or A13 Beta!
    Once I find enough time or QPR beta gets updated, I might update the QPR beta release. No plans to support A13 beta.

    I also finished up the tables/graphs in regards to different binnings with the respective voltages on different tensor chips thanks to the dmesgs you all provided. I really want to put out a big thanks here to everyone for taking the time and participating. It was really great to see this kind of response.
    I´ll provide them in a post in this thread soon.
    So with that in mind we´ll get to the next paragraph were I could put those tables to good use.

    A few changes from A13 Beta are merged to the kernel so we can enjoy the improvements on A12 ahead of time. Most of them aim to improve the scheduler and task placement.

    However the recently dropped A13 Beta source contains a commit that can restrict max-cpufreqs based on PMU (Power monitor unit) reading. I setup this mechanism (lets call it "PMU Limiter") to mildly cut back max-freqs when they aren´t needed. It works quite well so far, with no performance impacts during scenarios where max cpufreq is beneficial. (e.g. app launching, camera launching, interaction etcetc)
    That means if a certain threshold is not crossed the max-freqs will be restricted to 1,4GHZ/1,6GHZ/2,4GHZ (for little/mid/big cores). As soon as the PMU detects enough pressure, those limits will be lifted.
    The frequency limits are based on tracing during various scenarios, benchmarking and also factor in the voltage table I was able to create. For example: 2.4GHZ for the big cores is the last freq step where a steady linear increase in voltage can be seen. Freq steps higher than 2,4ghz have a steeper slope.
    Keep in mind CPU-Freqs shouldn´t be touched in EXKM/FKM or other kernel managers. They are controlled by various mechanisms now (thermal hal, powerhal, pmu limiter etc) and values will get overwritten based on input.
    That means if you open the CPU section in a kernel manager, the maxfreqs will not be the actual maxfreqs that are possible. or the minfreqs might be raised. That´s normal and there´s nothing wrong if that´s the case.

    Additionally to the previous changes tasks of rt, sf and ta groups are now biased to start on high capacity CPUs during app launches, interactions etc.
    As usual, depending on your usage you may or may not notice a difference during these scenarios. :)

    While tracing I noticed kswapd often takes 100% cpu share when reclamation is happening. Since we use an 8 core cpu, an additional kswapd thread is being spawned during boot, which increases throughput for kswapd in these scenarios. Reasoning behind this can be found here.

    The trusty driver which connects to the fingerprintreader hal uses now a high prio workqueue when the phone is unlocked via fingerprint scanner. This means better performance, especially under stress. Keep in mind this is a kernel level change, it won´t magically improve fingerprint reader times manifold.

    DAMON and DAMON-Reclaim were removed from 2.3.0 going to 2.4.0. I tested the feature privately and it unfortunately collides with googles EH zram implementation causing the phone to crash at the moment. Tried to debug this issue, but no luck for the May release here.
    If you previously enabled the feature without adjusting the parameters properly and your phone didn´t crash, DAMON-Reclaim just didn´t do anything.

    2.4.0 also has an updated anykernel3.zip, which includes all the latest anykernel3 changes.
    Thanks to @capntrips we now have full support to resize vendor_dlkm partition which is part of the super partition. That means we finally can flash larger than stock vendor_dlkm partitions via anykernel3.zips and resize the partition properly instead of just dd´ing to it.
    A huge thanks to @capntrips for working on this and to @osm0sis for maintaining anykernel3.


    Disclaimer:
    I´ll keep the warning as to preferably using magisk stable to avoid potential issues as well here in this post.
    Please note that 24306 works fine for me though on non beta, stable May firmware!
    Important:
    Make sure you´re being rooted with magisk 24300 stable before flashing the kernel if you´re unsure. Any magisk version above 24303 might potentially lead to a reboot back to bootloader since android 12.1.0 and A12L QPR3 Beta. At the moment this only affects canary, but I put the warning just in case this will not get resolved in upstream magisk in time until the next stable drops. I saw a post that some modules also have problems with latest canary, so there´s a lot going on at magisk´s side at the moment.
    A post containing a short write-up how to "downgrade" magisk can be found following this link.

    If you´re one of the unfortunate ones that suffer from the device is corrupt bug on pixel 6 series please take a look at the FAQ at the beginning of this thread it contains a solution. The issue is probably caused by a bug that affects pixel 6 devices and has nothing to do with magisk or a kernel, it just happens to get triggered when using any of those.



    Changelog:

    - Linux-stable merged to 5.10.113
    - Use prebuilt Google Clang 14.0.5 for compilation
    - Utilize an additional kswapd thread to increase throughput for memory reclaim
    - remove DAMON and DAMON-Reclaim from kernel build (2.4.0)
    - improve trusty driver performance which connects to fingerprintscanner-hal by using high prio wq during fp unlock (2.4.0)
    - mm improvements from kernel/common (2.4.0)
    - improvements from kernel-common a13 to page_pinner
    - mainline backports for BFQ scheduler
    - rework Multi-Gen LRU implementation
    - scheduler improvements for RT (realtime) tasks
    - other scheduler improvements
    - include scheduler improvements from A13 Beta regarding better task placement
    - introduce and setup PMU limiter (prevents CPU from spiking to max when it isn´t needed, based on PMU reads)
    - bias tasks of rt, sf and ta groups to prefer high capacity cpus during app launches, interactions, camera launches, etc
    - updated anykernel3.zip (thanks to @osm0sis) -> adds full support for resizing vendor_dlkm ( huge thanks to @capntrips )



    Download:


    Instructions can be found in the OP! Please follow the instructions to avoid any issues and read this post carefully. Don´t use magisk canary 24303 or more recent to avoid potential issues!
    If you´re coming from another kernel restore stock boot.img, dtbo.img, vendor_boot.img and vendor_dlkm.img before flashing. Thank you.

    I wish everybody a great day/evening!
    Have fun, enjoy the kernel and your phone.


    If you like my work please consider a donation.
    Donations are not mandatory but very welcome.
    If you like my work and want to buy me a coffee/green tea: http://paypal.me/freak07