Lmst

Hello world! I am Evalyn and I do funny projects.
I hope to meet some cool people here and make friends ;3

I like doing low level programming in C and making memes.
I am currently working on my osDev/Kernel project attached are some videos of some of my current progress

#kerneldev #osdev

75 MILLION cycles & 24h stress test: PASSED.

Final verdict on #RaspberryPi 4 + #Buildroot + Linux 6.19-rc1 PREEMPT_RT:

Max jitter: 118us (under heavy stress)
Max jitter: 70us (post-stress/idle)

Perfect recovery, zero drift, and absolute determinism. This $50 setup is officially outperforming industrial hardware 10x its price. The future of #RTLinux is here 👊🏻

#Linux #RealTime #EmbeddedSystems #RPi4 #KernelDev #OSDev #Stability

30 MILLION cycles. Max jitter: 118us. Solid as a rock. 🏁

Final report on my #Buildroot + #RaspberryPi 4 setup with Linux 6.19.0-rc1-v8 PREEMPT_RT.

After 8+ hours of torture:
🔥 stress-ng (2x VM workers)
📶 Active SSH over Wi-Fi
📊 Avg Jitter: 14us | Worst Case: 118us

The kernel isn't even stable yet, but this real-world performance is already production-ready. We are ready for the future of #RTLinux. 👊🏻

#Linux #RealTime #EmbeddedSystems #RPi4 #KernelDev #OSDev

We got there in the end.

This took a couple of days to figure out how to boot custom code and even get away from Open Firmware’s tight clutches.

I hope that #Fedi is proud of me for dealing with the bullshit of Open Firmware.

#Kernel #iBook #Apple #OSDev #KernelDev #OperatingSystems #Tech #Technology #Programming #Fediverse #Mastodon #PowerPC

An iBook G3 running my test kernel code. It says “M4 Microkernel [Commit HEAD] PowerPC, built on Dec 27 2025 @ 21:30:27 Framebuffer: 0x9c008000 (1024 x 768) Open Firmware has been quiesced successfully.”

A further away shot of the iBook G3, same text as before.

https://github.com/hexagonal-sun/moss-kernel/pull/23
MERGED!!!

#Moss #Kernel #OSDev #KernelDev #Tech #Technology #Programming #Apple #macOS

🧵

New #Project with my friends!

https://krnldev.nerdnextdoor.net/

We are making our own #OSDev / #KernelDev #Wiki. (We're aware of osdev.org and osdev.wiki.)

The wiki source is on #Codeberg. We aim to be a modern and reliable source for AARCH64 and x86_64 OSDev, documenting kernels and how they work so others can learn from them and being a friendly newcomer place.

We may do other architectures including 32-bit too but our main focus are the ones we picked.

#Tech #Technology #OperatingSystem #Kernel

Thanks to Huawei’s Baokun Li, block allocation code now scales much better — great news for multi-core, container-heavy systems. Benchmarks show big gains in fallocate ops & reduced file fragmentation (with a small trade-off in free space).

#Linux #EXT4 #Filesystem #KernelDev #Performance

It’s a solid intro to low-level development. If that’s your thing, you don’t want to miss this talk.

Secure your spot here ➡️ https://eurorust.eu/talks/a-minimal-rust-kernel/?utm_source=mastodon&utm_medium=social&utm_campaign=25-07-10-speaker-philipp-schuster

#RustLang #OSDev #QEMU #KernelDev

🧵2/3

So uh, #Arikoto now has GDT.

I'm not even sure if my #GDT #Code is correct but I think it works.

#GitHub repo:
https://github.com/IAmTheNerdNextDoor/arikoto

GDT code:
https://github.com/IAmTheNerdNextDoor/arikoto/blob/master/kernel/src/gdt.c

I'm dreading moving onto #IDT and #Interrupts now...

#OSDev #OSS #OperatingSystem #Kernel #Tech #Technology #Programming #KernelDev

🖥️ Kernel Compilation Complete! 🐧

Just wrapped up compiling the latest Linux kernel! 🛠️

Optimized for performance and stability—can't wait to see how it holds up under some heavy workloads. 💪

#Linux #OpenSource #KernelDev #TuxThreads #SysAdminLife

Anyone here know by chance how to properly compile a kernel for a Nothing Phone (1)?

https://github.com/NothingOSS/android_kernel_msm-5.4_nothing_sm7325

I cannot get it to boot. It will try for 100 seconds before rebooting so it at least somewhat runs.

#android #kernel #kerneldev

Noob Linux dev experience be like:

Play with cat while kernel copiles
“wow, nothing works”
change one line of code
goto 1

#Linux #KernelDev #LinuxDev

I just discovered that struct_ops has been designed to expose already existing kernel structs to userspace so that eBPF programs can “implement interfaces” already defined in the kernel. I don’t know why but it just blew my mind, tcp_congestion_ops is already implemented in a lot of non-eBPF related places, the eBPF struct_ops integration is much more recent. It might be obvious to a kernel developer but I didn’t pick up on that reading the documentation and now the surrounding code makes a lot more sense.

#Linux #KernelDev #eBPF

https://www.omgubuntu.co.uk/2023/10/linux-kernel-6-6-new-features

Via @omgubuntu

Linux Kernel 6.6 is out with a Ton to talk about

- A new CPU scheduler (EEVDF replacing CFS)
- a new Eventfs system
- a ton of new drivers
- a ton of AMD boosts and additions
- Intel Shadow Stack

There's a ton more, but those are the highlights, all in all a lot of good stuff.

#FOSS #OpenSource #Linux #LinuxKernel #KernelDev #AMD

I‘ve been reading this code for some weeks now in my spare time https://github.com/mit-pdos/xv6-riscv/tree/riscv it‘s a simple unix like operating system written in assembly and C with a few ld scripts to glue it together. #fascinating #kernel #kerneldev #operatingsystems #unix

I know it's a long shot, but is anyone here familiar with the mechanics involved in the scheduling of isochronous USB transfers in the linux kernel? I'm running into some weird problems where the URBs fail to submit because the EHCI scheduler reports that I'm out of bandwidth depending on which order they're submitted in. This is specifically related to USB audio, where sometimes the ISO OUT URBs are submitted before the ISO IN ones when starting a full duplex stream, in which case it works fine, but for some reason it fails with `cannot submit urb 0, error -28: not enough bandwidth` when submitting them the other way around.

#linuxkernel #kerneldev