compile_kernel.md

Compiling a Linux kernel

First, clone the kernel source code with the version you like. Then install the dependencies

sudo apt update
sudo apt install -y build-essential bc bison flex libssl-dev libelf-dev dwarves pkg-config git rsync wget curl libncurses-dev

Then, we need to configure the kernel before building it:

cp /boot/config-$(uname -r) .config
make olddefconfig

scripts/config --enable CONFIG_DAMON \
               --enable CONFIG_DAMON_VADDR \
               --enable CONFIG_DAMON_PADDR \
               --enable CONFIG_DAMON_SYSFS \
               --enable CONFIG_DAMON_RECLAIM \
               --enable CONFIG_DAMON_LRU_SORT \
               --enable CONFIG_TRANSPARENT_HUGEPAGE \
               --enable CONFIG_MEMORY_HOTPLUG \
               --enable CONFIG_MHP_DEFAULT_ONLINE_TYPE_ONLINE_MOVABLE

# Below is required to resolve dependencies
make olddefconfig

To verify the config file is written correctly:

grep -E "CONFIG_DAMON|CONFIG_TRANSPARENT_HUGEPAGE" .config

Compile the kernel:

make -j$(nproc)

Install kernel modules and kernel itself:

sudo make modules_install
sudo make install

Update Initramfs:

sudo update-initramfs -c -k $(make kernelrelease)

Verify by:

ls /boot/initrd.img-$(make kernelrelease)

Update grub, then reboot:

sudo update-grub
sudo reboot