Hello, World!

By Clemens Tiedt

2021-08-21

Hi, I'm Clemens and this is my blog. As you may have gathered from the sidebar, I'm a software developer.

I currently study in the IT-Systems Engineering Master's program at HPI in Potsdam. My main interests are Operating Systems, Rust, and Mobile Development, so you can expect to see articles about these topics on here. But if I find some other interesting topic to write about, that might also end up here.

Besides Computer Science I'm passionate about Tabletop RPGs and Video Games, so I might also have ideas to share about those.

A Soil VM for the Linux Kernel

One of the Linux kernel features that have gained the most traction in the last few years is probably (e)BPF. Originally, the "Berkeley Packet Filter" was intended as a means of filtering network packets in kernel mode. However, BPF quickly developed into a fully-featured VM used for all kinds of purposes. The appeal of BPF is not hard to see: It allows you to load kernel mode code at system runtime (similar to kernel modules) while keeping some degree of sandboxing and fault tolerance afforded by the VM. It is much more difficult to break your kernel with a BPF program than with a regular kernel module. One of the most prominent current users of BPF is sched_ext, a framework for writing scheduler implementations in BPF. This lets you easily tinker with your scheduler and see results live and without the risk of breaking your kernel if your implementation crashes....

2024-09-05 #soil #c #linux #kernel

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