As of August 8, 2022, the project will cease to be developed. Thank you to all users for their willingness to use the project and bug reports.

I encourage all users to use CachyOS kernels, in the development of which I will take an active part from now on.

Kernels and modules with RT (RealTime) patch:

• linux-rt-bfq-dev

• linux-rt-bfq-dev-git

linux-rt-bfq-dev/linux-rt-bfq-dev-git 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-patches / bfq-dev-lucjan-patches - specific patches authored by Paolo Valente and Piotr Gorski

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

• graysky's GCC/Clang patch - version for gcc v11/clang v12

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

Some patches for BFQ conflict with patches for BFQ-dev.

To use linux-rt-bfq-dev/linux-rt-bfq-dev-git smoothly apply bfq-reverts before bfq-dev patch. Otherwise the kernel will not compile.

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

---

Download:

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

or

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

Install:

cd /some_path/kernels-rt/package_name
makepkg -srci

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)