[Google Pixel 2 XL ROMs, Kernels, Recoveries, & Oth] Sultanxda:
Changelog:

August 14, 2020:

*Merged August Security Bulletin fixes

*Now built with GCC 10.2

*Slightly reduced overall power consumption

Old changelogs:

July 11, 2020:

*Merged July Security Bulletin fixes

*Fixed occasional flashes when the screen was turned off or on (Pixel 2 XL only)

*Fixed lagging after accumulating about a week or more of continuous uptime (i.e., not rebooting for a week or more)

June 2, 2020:

*Merged June Security Bulletin fixes

*Fixed a bug where the screen would turn black and the device would stop responding

*Reduced Pixel 2 XL display power consumption (thanks to kdrag0n)

*Pixel 2 XL screen turns on faster now (thanks to kdrag0n)

May 22, 2020:

*Fixed a rare random reboot bug caused by ext4 which affects every Pixel 2/XL kernel (including stock)

May 7, 2020:

*Merged May Security Bulletin fixes

*Improved CPU idle efficiency yet again for better battery life

*Built with GCC 10.1 for improved performance

April 25, 2020:

*Improved CPU idle efficiency even more for better battery life

April 22, 2020:

*Merged April Security Bulletin fixes

*Fixed Simple LMK killing music apps in the background

*Improved Simple LMK's speed in some rare scenarios

*Improved CPU idle efficiency

*Updated installer for Lineage recovery (thanks to MSF Jarvis and Eamo5)

March 27, 2020:

*Built with GCC 9.3 (previously built with GCC 9.2)

*Built with Dead Code Elimination (DCE) to shrink the kernel's size by about 10%

*Attempted to fix a rare kernel panic in the ext4 driver

*Improved filesystem performance

*Fixed the vDSO so that Android can get the time from the kernel faster

*Slightly improved Simple LMK performance for certain scenarios

March 11, 2020:

*Built with Link Time Optimization (LTO) for improved overall kernel performance

March 5, 2020:

*Lowered minimum CPU frequency from 1.8 GHz to 1.4 GHz to improve battery life

March 2, 2020:

*Merged March Security Bulletin fixes

February 28, 2020:

*Fixed intense lag when opening camera sometimes (due to Simple LMK)

February 26, 2020:

*Fixed Simple LMK incompatibility with Android 10 (this caused it to erroneously kill important apps frequently)

February 24, 2020:

*Improved Simple LMK kill mechanism to fix lag when opening the camera

February 21, 2020:

*Improved memory management performance

*Improved Simple LMK app selection and performance

*Backported binder driver from the Android 4.19 kernel (improves overall system performance)

February 9, 2020:

*Merged February Security Bulletin fixes

*Improved Simple LMK's performance to fix random freezes

January 20, 2020:

*Updated to Android 10

-Fixed a bug in the Android 10 kernel that caused WiFi to randomly disconnect

-The Settings app is no longer killed in the background

*Fixed Simple LMK killing too many apps when memory was extremely low

November 5, 2019:

*Added fix for Binder use-after-free security vulnerability

*Removed a buggy GPU driver change I made that caused graphical glitches

*Rewrote ION driver again for improved performance and stability

*Fixed a severe deadlock issue in the rewritten IOMMU driver

*Improved Simple LMK to kill fewer apps and react to low memory situations faster

*Fixed a rare bug where Simple LMK would stop working entirely until a reboot (this would cause freezes when memory was low)

August 22, 2019:

*Fixed video playback and camera issues introduced in the previous build

August 21, 2019:

*Further improved the performance of and fixed bugs in the rewritten IOMMU driver

August 6, 2019:

*Merged August Security Bulletin fixes

*Fixed rare graphical glitches when opening the camera

*Improved frame rendering latency

July 31, 2019:

*Added back various small performance optimizations that were confirmed to be safe

July 29, 2019:

*Fixed graphical glitches

July 21, 2019:

*Attempted to fix occasional graphical glitches

July 20, 2019:

*Fixed a serious bug in Simple LMK that caused it to kill a random number of processes when memory was low

*Removed multiple potentially unstable performance optimizations until they can be validated

July 13, 2019:

*Further improved ION memory manager performance

*Fixed a rare random reboot when switching between Google Camera and Settings

July 8, 2019:

*Fixed another rare random reboot introduced in the ION driver rewrite

*Fixed serious stack memory corruption issue introduced in a display driver optimization

*Improved ION memory manager performance

July 1, 2019:

*Merged July Security Bulletin fixes

*Improved filesystem performance

*Improved frame rendering performance

*Fixed more memory leaks

June 28, 2019:

*Fixed random reboots caused by a race condition in the rewritten IOMMU driver

*Compiled kernel with GCC 9.1

June 26, 2019:

*Fixed rare random reboot caused by ION driver rewrite

*Fixed 4-year-old memory leak located deep in the IOMMU subsystem

June 25, 2019:

*Fixed random reboot caused by an incorrect audio driver optimization

June 24, 2019:

*Added back charge-rate limitation for the 2 XL (removing it caused charging speeds to plummet)

*Improved camera speed slightly

June 23, 2019:

*Fixed remaining random reboots caused by ION driver rewrite

*Fixed random freezes and reboots caused by an incorrect memory allocation optimization

*Removed charge-rate limitation while the screen is on for the 2 XL

*Removed maximum screen brightness limitation

*Google Camera and Settings are killed when they run in the background, to prevent high battery drain (more info)

June 22, 2019:

*Fixed random freezes caused by ION driver rewrite

June 21, 2019:

*Fixed crash when trying to record video

June 20, 2019:

*Fixed potential use-after-free bug in rewritten ION driver

June 19, 2019:

*Further rewrote ION memory manager for improved stability and performance

*Replaced several high-frequency dynamic memory allocations with constant-time ones (this improves overall performance)

June 15, 2019:

*Improved ION memory manager performance

*Reduced GPU processing latency

June 12, 2019:

*Rewrote ashmem driver to improve performance

*Improved binder driver performance

*Fixed diag mode

June 7, 2019:

*Fixed memory leak introduced in the previous build

June 6, 2019:

*Rewrote ION memory manager to improve performance

June 3, 2019:

*Merged June Security Bulletin fixes

June 1, 2019:

*Fixed rare display glitches

May 27, 2019:

*Improved Simple LMK to kill fewer apps

*Improved touch latency

*Improved frame rendering latency

*Improved display, touchscreen, and UFS power consumption

May 11, 2019:

*Fixed camera issues

May 10, 2019:

*Improved Simple LMK performance

*Improved frame render latency

May 6, 2019:

*Merged May Security Bulletin fixes

*Reduced scheduler tick frequency to 100 Hz to save power

*Added back zRAM support

May 4, 2019:

*Added functional Simple LMK

*Removed zRAM support (Simple LMK works better without the costs of zRAM hindering it)

*Improved graphics rendering performance

*Reduced idle power consumption

May 1, 2019:

*Removed Simple LMK (will it ever work?)

April 30, 2019:

*Tweaked Simple LMK yet again to fix freezes

*Disabled haptic feedback while the camera is in use

*Disabled hall effect sensor by default to fix the screen randomly turning off/on near strong magnetic fields (it can be re-enabled by flashing an optional zip in the OP)

April 29, 2019:

*Tweaked Simple LMK to fix short freezes

April 28, 2019:

*Optimized CPU frequencies and EAS energy model for improved performance and battery life

*Added overhauled Simple LMK for improved memory management

April 19, 2019:

*Fixed high power consumption when multitasking

*Improved performance when gaming

April 18, 2019:

*Rebased on official April kernel release

*Overhauled the entire kernel

January 13, 2019:

*Merged January Security Bulletin fixes

*Improved memory management (apps are killed less often)

December 12, 2018:

*Merged December Security Bulletin fixes

*Fixed random reboots when performing backups in recovery

November 6, 2018:

*Merged November Security Bulletin fixes

October 30, 2018:

*Fixed Simple LMK randomly killing too many apps (this caused music players to die sometimes)

October 23, 2018:

*Fixed camera laser sensor

*Fixed stuttering when multitasking

October 16, 2018:

*Fixed overheating

*Slightly improved overall performance

October 14, 2018:

*Re-enabled zRAM

*Improved graphics performance (details)

October 2, 2018:

*Merged October Security Bulletin fixes

September 30, 2018:

*Added Simple LMK, a new LMK written from scratch that improves memory management (details)

September 17, 2018:

*Switched back to stock LMK until Simple LMK is stable

September 10, 2018:

*Fixed SystemUI crashes caused by Simple LMK

September 9, 2018:

*Fixed more performance issues and bugs with Simple LMK

*Added flar2's vibration control

September 8, 2018:

*Fixed lag and performance issues caused by Simple LMK

*Improved memory management compared to previous builds with Simple LMK

September 5, 2018:

*Merged September Security Bulletin fixes

*Fixed additional issues with the new low memory killer

*Fixed several instances of blatantly incorrect code (improves stability; details)

September 4, 2018:

*Fixed freezes caused by new low memory killer

September 3, 2018:

*Fixed occasional lag when low memory killer kicked in

*Added Westwood+ TCP congestion algorithm and enabled it by default

September 2, 2018:

*Switched to custom low memory killer driver for improved memory management

August 19, 2018:

*Switched to userspace low memory killer (apps will be killed less frequently; improves memory management)

August 18, 2018:

*Fixed touchscreen not working in TWRP

August 15, 2018:

*Fixed slow charging on the Pixel 2 XL

*Reduced power consumed by the battery fuel gauge

August 14, 2018:

*Fixed Android being unable to read detailed power info from the kernel

August 13, 2018:

*Reconfigured CPU boost frequencies to reduce overall power consumption

August 12, 2018:

*Reworked for Pie

*Added devfreq boost driver; boosts the device that controls how quickly data can move between RAM and the CPU (improves overall fluidity)

June 28, 2018:

*Fixed worsened screen-wake performance introduced in previous build

June 27, 2018:

*Added CPU boost on app launch (makes apps launch faster)

June 20, 2018:

*Reduced power consumed by new CPU boost mechanism

June 19, 2018:

*Fixed WeChat

June 18, 2018:

*Added support for custom ROMs (thanks to nathanchance)

*Adjusted CPU boost frequencies to significantly reduce power consumption without hurting performance

June 17, 2018:

*Added new CPU boost driver that maximizes battery life while keeping the phone perfectly smooth (details: 1, 2, 3, 4)

*Fixed potential random reboots caused by coding errors detected using static analysis

June 11, 2018:

*Removed CPU underclock

*Fixed off-mode charging

*Fixed the internal hardware problem error message shown on boot

June 10, 2018:

*Initial release