[Kernel][28.05.2023][4.14.315][A12][A13] Kirisakura 9.1.6 for Pixel 4/XL aka FLORAL

[Freak07]

Kirisakura-Kernel for the Pixel 4 and Pixel 4 XL

Hello everyone,

After rising to the most popular kernel on the Pixel 3/XL forums, here is Kirisakura-Kernel for the Pixel 4 (FLAME) and Pixel 4 XL (CORAL), together FLORAL.
Kirisakura - Kernel is designed to bring a handful of beneficial features to the device, while ensuring excellent performance and smoothness to get you safely through the day!

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, CAF-Upstream, F2FS-Mainline 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.


Main Features:
- Based on latest kernel sources from Google, Kernel is made for Android 13
- Linux-Stable-Upstream included to latest 4.14.315
- CAF-Upstream usually based on one of the latest tags for sm8150
- include all important fixes/improvements from kernel/common
- compiled with latest Clang 16.0.2 from Google prebuilts and built with -O3 optimizations
- F2FS implementation updated to latest state of kernel/common and kernel.org maintained by Jaegeuk Kim.
- devfreq backports from 5.4 (sd 888 qcom kernel base)
- Safety Net patches are included -> Kernel passes Safety Net (hardware attestation is not related to these kernel patches)
- Flashing the kernel will keep root!
- Tested to work on custom ROMs
- Flashable via EXKM and FKM on a rooted system!
- remove extensive Memory Management logging from Google
- removed nolog usage, remove rtb logging from the kernel
- remove selinux auditing from kernel for lower overhead
- remove IPC logging from the kernel
- introduce kmalloc reclaimable caches for improved memory management
- AnyKernel3 powered by @osm0sis (big thanks!)

EAS related features:
- CleanSlate options to dynamically control freq boosting and sched boosting of powerhal
- small improvements to tasks placement
- fixes from kernel/common to EAS
- improvements from Pixel 5


CPU related features:
- Power saving workingqueues enabled by default (toggleable in EXKM)
have a read here: https://lwn.net/Articles/731052/
this complements EAS in general
- Change various drivers (WLAN, MM, audio, charger, power, thermal, glink etc) to user power efficient workingqueues. This should work well in conjunction with EAS
- include cpuidle patches from CAF
- s2idle-flow improvements from mainline
- improve efficiency while music playback
- arm64: lse: Prefetch operands to speed up atomic operations
- improve camera launch time

File System related features:
- Include latest f2fs changes found on f2fs stable git
- Include rapid GC by @arter97 ( best thing is to read the commit description linked here. I compared GC on stock google f2fs, upstreamed f2fs and f2fs with rapid GC. Rapid GC is the most effective, followed by upstreamed f2fs.)

GPU related features:
- KCAL to control various RGB related display configs (RGB, Hue, Saturation etc -> accessible via CleanSlate Config App)
- add ability to reduce minimum brightness
- add high-brightness-mode (HBM)
- Update GPU driver to latest CAF state
- improve GPU performance (overall smoother experience)
- reduce power consumption when rendering static images
- enable of usage of SD855+ GPU frequencies as optional feature

UI/UX/Usability related features from CleanSlate:
- CleanSlate features made by @tbalden
- Adjust all CleanSlate features with the CleanSlate-Apps found in the CleanSlate-Thread (if you profit from the CleanSlate features make sure to buy the premium versions on Play-Store to support
@tbalden
- CleanSlate options that require permissive selinux in any way are not included, as they can be easily achieved otherwise on a rooted environment and this kernel is not intended to be used rootless (adblocking, props spoofing etc.)
- Flashlight Notification/Call blinking
- Vibrating Notification Reminder
- Sweep to Sleep touchscreen gesture - highly customizable
- DoubleTap on Sweep2Sleep's area gestures - new way to pull down android Notification Area
- Face down screen off - new gesture, e.g. conveniently use together with 'flip to shh' to turn screen off

Network related features:
- Wireguard Support (Details)

Memory related features:
- updated PSI monitor with latest changes
- improved mm with patches from latest mainline
- various other changes from mainline
- included zstd and lz0-rle as options for ZRAM-algorithm (lz4 is probably the best all around, so only change it if you know why and what you are doing)
- allow swappiness up to a value of 200
- Backport to enable CONFIG_HAVE_MOVE_PMD (see here)
- Backport to enable CONFIG_HAVE_MOVE_PUD (see here) (reverted for now as it breaks audio driver)
- improvements to ZRAM writeback (thanks @arter97 )
- disable per cgroup tracking via psi to reduce overhead

Security related features:
- CFI and LTO both kept intact and are used to keep additional security Google implemented for us!
- ThinLTO used as of 3.9.0
- Shadow Call Stack

Tuned PowerHal
- allow kernel to idle on lowest frequencies when no interaction is happening
- increase swappiness during periods without interaction to favor swapping memory, relax swappiness otherwise
- scheduler camera processes to the big cluster and prime core when faceunlock is used
- adjust powerhal behaviour when the camera is used

Misc Features:

TCP Congestion Algorithms:
- advanced algorithms enabled
- includes new bbr2
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

Other features:
- disable logging to make the kernel more lightweight in various places (includes mm, vma, gpu, ipa etc)
- remove VLAs from the kernel (more info)
- add support for steam controller
- add support for nintendo switch controller
- merge upstream solution for PM/Wakeup driver, which reduces unnecessary logspam and also improves sleeping behaviour
- merge freezer v2 backport from google gerrit (required for developer option ""suspend execution for cached apps"")

Feature section for the "non visible" but perceptible improvements:
- updated binder section (responsible for interprocess communication)
- updated sdcardfs ; have a read about it here:


Requirements

- unlocked Bootloader
- USB-Debugging in developer options enabled
- latest adb and fastboot binaries
- working adb and fastboot environment
- working magisk environment
- latest stock rom (custom roms can have issue, several users reported success when rooted with magisk 24.3 instead of latest)


How to flash the Kernel:

1. Download the kernel.zip to your device

1a. While it may not be necessary all times when coming from another custom kernel: You may want to restore stock boot.img as well as stock dtbo.img, which can both be found in the factory image. If you´re on a custom rom, simply dirty flash your ROM. Reroot with magisk and optionally install twrp.zip (if existing). Before reporting issues make sure you do that! Thank you!

1b. If you used the SQLITE3 Magisk Module and the GPay Fix Magisk Module in the past look at this post: click me

You only need to do either 2a OR 2b
2a. If TWRP is available for this device and specific android version, boot to TWRP and flash my kernel.zip. Root will be preserved!
or
2b. Flash kernel zip in EX Kernel Manager or FKM app. Root will be preserved! If a kernel manager is not yet updated to work on a specific Android Version, you need to wait until it is updated or use another one.

4. Reboot and profit!



DOWNLOAD:
Download is located always in this folder or attached to the release post in case it´s now in AFH.

https://www.androidfilehost.com/?w=files&flid=301179

Please also check the release posts for download links or attched files. AFH is often down recently.


Important: Read after Download
Please take a look at the second post after flashing the kernel!


Changelog:

Android 10/ Q Kernels
1.0.0 Initial Release
1.0.1 https://forum.xda-developers.com/showpost.php?p=80712545&postcount=51
1.0.3 https://forum.xda-developers.com/showpost.php?p=80791393&postcount=181
2.0.0 https://forum.xda-developers.com/showpost.php?p=81069625&postcount=341
2.1.0 https://forum.xda-developers.com/showpost.php?p=81168297&postcount=424
2.3.0 https://forum.xda-developers.com/showpost.php?p=81244627&postcount=491
2.3.4 https://forum.xda-developers.com/showpost.php?p=81311861&postcount=561
2.6.0 https://forum.xda-developers.com/showpost.php?p=81408591&postcount=611
2.9.0 https://forum.xda-developers.com/showpost.php?p=81527369&postcount=692
2.9.2 https://forum.xda-developers.com/showpost.php?p=81575075&postcount=702
3.1.0 https://forum.xda-developers.com/showpost.php?p=81625099&postcount=725
3.2.0 https://forum.xda-developers.com/showpost.php?p=81679343&postcount=761
3.9.0 https://forum.xda-developers.com/showpost.php?p=81926617&postcount=802
3.9.1 https://forum.xda-developers.com/showpost.php?p=81943269&postcount=824
4.2.0 https://forum.xda-developers.com/showpost.php?p=82189985&postcount=851
4.5.0 https://forum.xda-developers.com/showpost.php?p=82485339&postcount=892
4.5.6 https://forum.xda-developers.com/showpost.php?p=82562029&postcount=941
4.7.5 https://forum.xda-developers.com/showpost.php?p=82725499&postcount=986
5.0.0 https://forum.xda-developers.com/showpost.php?p=83019609&postcount=1022
5.2.2 https://forum.xda-developers.com/showpost.php?p=83206123&postcount=1066
5.2.6 https://forum.xda-developers.com/showpost.php?p=83387505&postcount=1078

Android 11/ R Kernels
6.0.0 https://forum.xda-developers.com/showpost.php?p=83476821&postcount=1092
6.1.3 https://forum.xda-developers.com/showpost.php?p=83649491&postcount=1131
6.2.4 https://forum.xda-developers.com/showpost.php?p=83849179&postcount=1143
6.6.0 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-84068177
6.6.6 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-84227741
6.8.2 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-84408147
7.1.0 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-84588667
7.1.1 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-84603881
7.2.3 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-84747379
7.4.0 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-84900715
7.4.1 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-84951399
7.4.2 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-85000553
7.4.3 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-85079523
7.4.4 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-85155405
7.9.0 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-85298631
7.9.1 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-85424575
7.9.2 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-85473277
7.9.3 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-85674963

Android 12
8.0.0 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-86063673
8.0.3 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-86236075
8.0.4 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-86413329
8.0.5 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-86550055
8.2.0 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-86843221
8.2.2 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-87006201

Android 13
9.0.0 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-87295655
9.0.2 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-87532941
9.1.0 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-87760941
9.1.1 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-87868847
9.1.4 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-88332237
9.1.6 https://forum.xda-developers.com/t/...r-pixel-4-xl-aka-floral.3992213/post-88583047

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

Credits:

@osm0sis for all his work, including the ak3 installer!
@tbalden for being the best HTC wingman!
@LeeDroid for his awesome roms!
@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 all of his work and the stuff I could learn from him
@flar2 for all his work
@joshuous for all the help he provided to me in the past!
@topjohnwu for magisk!
@arter97 , @kdrag0n for helping me out several times!

XDA:DevDB Information
Kirisakura Kernel, Kernel for the Google Pixel 4 XL

Contributors
Freak07
Source Code: https://github.com/freak07/FLORAL

Kernel Special Features:

Version Information
Status: Stable

Created 2019-10-27
Last Updated 2020-11-03

 

[Freak07]

F.A.Q:

Question: Is root preserved when flashing this kernel?
Answer: Yes the Anykernel Zip will detect root and keep it.

Question: How do I return back to stock or another kernel.
Answer: Extract boot.img and dtbo.img from the factory image and flash them via fastboot.

Question: How to report bugs properly?
Answer: Have a look at post #3 in this thread. The linked guide is a pretty good starting point.
Before reporting any bug make sure you´re not using any mods, magisk modules, scripts or other modifications that alter various functions like sound mods, data traffic etc.
Try to describe the issue as detailed as possible! Give your exact setup, like rom, magisk version, kernel version.
Is the issue reproducible? Does it happen frequently?
Provide logs, otherwise debugging is a lot harder. If you can already reproduce the issue and provide logs it greatly limits the amount of time I have to spent until I figure out how to reproduce it.

If the device force reboots/randomly reboots (that means you see the bootloader unlocked screen!) provide a ramoops file.
Easiest way is immediately after booting up, with a root explorer navigate to sys/fs/pstore. Copy the contents to your internal storage, zip it up and send it to me.

If the issue happens while the device is running provide a dmesg plus a logcat that you take while/shortly after the issue happens. This will log what´s running in the current session. Try to be as detailed as possible what´s happening when the issue appears. It will also help me in reading the log!

 

[Freak07]

Useful Resources

How to report bugs:

It is incredibly useful if bug reports are done in a proper way. That saves everyones time and will ultimately lead to a faster bugfix (hopefully).
The following guide from @nathanchance is a very good guideline on how to properly report a bug!

https://github.com/nathanchance/Android-Tools/blob/master/Guides/Proper_Bug_Reporting.txt

 

[Freak07]

SQLite3 and GPay Fix Magisk Module:

The combination of these two modules and F2FS-Upstream patches included in the 1.0.x release kernels, caused the device to freeze sporadically after rebooting.
2.0.0 does not include F2FS-Upstream so these two modules can be used again.
To remove the modifications done by these modules and start clean again on Release 2.0.0 and the following releases do the following:

1. Remove the SQLite 3 Module and the GPay Fix Magisk Module by following instructions
2. Do a full reboot
3. Wait a few minutes after successfully booting
4. Clear data and cache for Google Play Services, Google Play Store and Google Pay
5. Wait a few minutes so all deleted stuff gets rebuilt properly and reboot again
6. I´d prefer to use the following method to enable GPAY functionality instead of the modules: https://forum.xda-developers.com/showpost.php?p=80763371&postcount=11
7. If you really have to, install both modules and make sure you´re on Kirisakura 2.0.0 or greater

 

[zetsumeikuro]

Oh snap! The fun has begun boys! Good to see your kernel here!

 

[JakeDHS07]

Glad to see dev progress so quickly. Will check this out. Kudos

 

[ridobe]

That was awfully quick! So glad to see you here.

 

[Misterxtc]

Thank you @Freak07. Flashed without a problem with EX KM. Nice work.

 

[DIXZ06]

That was quick! Thank you so much. :good:

 

[SinisterXReaper]

I am unbelievably excited to see you here! I'm glad to see an amazing DEV working so hard, and quick, to bring an amazing kernel to the 4xl!

 

[Ippolito1971]

So very happy @Freak07 maintaining a kernel for the OP7/7pro and now the P4/P4XL. Thanks for all you do man!!

 

[Doenerbude]

Anyone has an alternate download link? Because androidfilehost is extremely slow and terminate the connection after about 15-30 minutes

 

[rickysidhu_]

You got the 4 XL, awesome! Happy to see you here

Getting my 4 XL tomorrow, will be flashing this as soon as it's delivered

 

[Doenerbude]

Ok the download worked finally. Such a crap, had a lot of similar problems with this lousy hoster in the past

 

[LukLak19]

Dies anyone know If it is possible to get 4k at 60 fps? On other Smartphones it was possible in the past but i don't know if it will be possible with our Pixel 4.

 

[xdeslitx]

any big difference between exkm and fkm?

 

[c_86]

glad to see you here...

PS: Ignore my PM lol

 

[CyberpodS2]

Good to go!

 

[ilal2ielli]

Good to go!

Nice! Flashed with EXKM or FKM? Or good old fashioned fastboot flash boot?

Edit: Flashed with FKM and no issues with flashing.

I do notice that charge speed is about 1500mA slower than with stock kernel. Although I do remember with my Pixel 2 XL similar behavior occurred with a slower reported mA, but overall charge time was basically the same as stock kernel.

Edit 2: And of course I jumped the gun. Just checked again and charging is back to stock speed, approximately 3200mA.

 

[Logix]

any big difference between exkm and fkm?

For flashing no. Both flash the same way.

I Feel compelled to remind people dont ask for features or ETA's especially the day a kernel gets released. I already see that in the first page.
That being said:
The developer here wants feedback about how the kernel works on the device not a bunch of off topic comments /questions this is a development forum.

We do have a q/a and general section for this device feel free to create a proper thread.