sudo apt-get install build-essential flex bison bc dwarves libssl-dev libelf-dev libncurses-dev

uname -r
5.15.90.1-microsoft-standard-WSL2

# download WSL kernel source from https://github.com/microsoft/WSL2-Linux-Kernel/releases

wget https://github.com/microsoft/WSL2-Linux-Kernel/archive/refs/tags/linux-msft-wsl-5.15.90.1.tar.gz &&
tar xf linux-msft-wsl-5.15.90.1.tar.gz &&
cd WSL2-Linux-Kernel-linux-msft-wsl-5.15.90.1 &&
cp Microsoft/config-wsl .config

## enable following kernel features

# ipv6 should enabled

CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
CONFIG_IPV6_MULTIPLE_TABLES=y
CONFIG_IPV6_SUBTREES=y

# codec2 required, can use ION for legacy kernel

CONFIG_DMABUF_HEAPS=y
CONFIG_DMABUF_HEAPS_SYSTEM=y

# optional, can use memfd

CONFIG_STAGING=y
CONFIG_ASHMEM=y

# binderfs required

CONFIG_ANDROID=y
CONFIG_ANDROID_BINDER_IPC=y
CONFIG_ANDROID_BINDERFS=y
CONFIG_ANDROID_BINDER_DEVICES="binder,hwbinder,vndbinder"

## build kernel

make -j`nproc`

## copy `arch/x86_64/boot/bzImage` to some folder in Windows

cp ./arch/x86/boot/bzImage /mnt/d/wsl

## follow https://docs.microsoft.com/en-us/windows/wsl/wsl-config#configuration-setting-for-wslconfig
## to use this new kernel

cat .wslconfig
[wsl2]
kernel=D:\\wsl\\bzImage
memory=4GB

## running redroid

docker run -itd --privileged --restart=always -v ~/data11:/data -p 5555:5555 --name redroid redroid/redroid:11.0.0-latest