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My own kernels. Use at your own risk.

Dell Inspiron 15-3542 (3542-2538) with Fourth Gen Intel Core i3/i5/i7 optimized.

linux-lucjan varies considerably from stock kernel.

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linux-lucjan incorporates:

• bfq improvements - latest fixes authored by Paolo Valente and BFQ Team

• bfq-dev - latest fixes authored by Paolo Valente and BFQ Team

• bfq-dev-lucjan - latest fixes authored by Paolo Valente and BFQ Team and forked by Piotr Gorski

• bfq-dev-lucjan-rc / bfq-dev-lucjan-rc - specific patches authored by Paolo Valente and Piotr Gorski

• graysky's GCC patch - version for gcc 10.1

• Project C / Project C blog - contains the newest vesion with latest fixes

• random fixes from zen-kernel - specific patches authored by Jan Alexander Steffens and ZEN Kernel Team

• random fixes from pfkernel / random fixes from pfkernel - for example patches from Arch Linux or specific patches authored by Oleksandr Natalenko

• fixes from ClearLinux - specific patches authored by ClearLinux Team

• UKSM (sources) / UKSM (info) - resync from dolohow’s github

• LL-patches / LL-patches - specific patches authored by Piotr Gorski

• LL-branding / LL-branding - specific patches authored by Piotr Gorski

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Some patches for BFQ/block-stable conflict with patches for BFQ-dev/block-mainline.

To use lucjan-kernels smoothly apply ll-reverts before linux-lucjan patch. Otherwise the kernel will not compile.

• ll-reverts / ll-reverts - specific patches authored by Piotr Gorski

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Download:

git clone https://github.com/sirlucjan/lucjan-kernels.git

or

git clone https://gitlab.com/sirlucjan/lucjan-kernels.git

Install:

Testing

cd /some_path/lucjan-kernels/lucjan-kernels-testing/package_name
makepkg -srci

Unstable

cd /some_path/lucjan-kernels/lucjan-kernels-unstable/package_name
makepkg -srci

Rolling

cd /some_path/lucjan-kernels/lucjan-kernels-rolling/package_name
makepkg -srci

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Enable bfq

For now, you can use sudo tee /sys/block/sda/queue/scheduler <<< bfq to enable "bfq".

You can also add this to file 60-schedulers.rules:

# Non-rotational disks
ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="bfq"
# Rotational disks
ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"

and run a command sudo udevadm control --reload && sudo udevadm trigger

For now, bfq is enabled by default! (since 5.0-lucjan-ll1-rc1.patch and LL-elevator-set-default-scheduler-to-bfq-for-blk-mq.patch)

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Enable zstd compressed modules

To build a kernel with modules compressed in zstd format, insert any character here (it can be "y", "x" or any other value):

### Enable MODULE_COMPRESS_ZSTD
# WARNING Not recommended.
# An experimental solution, still in testing phase.
# Possible compilation and installation errors.
# Leave it unselected.
# However, if you want to test the new solution,
# first install mkinitcpio-zstd and kmod-zstd:
# https://gitlab.com/sirlucjan/lucjan-kernels/tree/master/depends
# or
# https://github.com/sirlucjan/lucjan-kernels/tree/master/depends
_zstd_modules=

Remember that to do this you need to install modified versions of kmod (kmod-zstd) and mkinitcpio (mkinitcpio-zstd). To do this, run the following command:

cd /some_path/lucjan-kernels/depends/package_name
makepkg -srci

NOTE: mkinitcpio-zstd will overwrite the mkinitcpio.conf file and the old one will be saved as mkinitcpio.conf.pacsave - however, I recommend backing up this file before installing the modified mkinitcpio version.

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You've been warned.