Minsoo's FreeBSD wiki page

Introduction

Hi, I'm Minsoo, currently studying computer engineering at the University of Waterloo (currently planning transfer to mathematical physics). I have been using FreeBSD since FreeBSD 12.2. I avoided contributing to FreeBSD back then because I didn't want to use Subversion, so when FreeBSD finished the Git migration I started submitting patches to FreeBSD (mostly doc back then).

These days I work on schedulers, kernel dumps, and LLDB. I'm planning to work on virtual memory stuff in the future to introduce KASLR in the kernel.

TODO

LLDB

I hope I could finish the tasks below before LLVM 23 branching, but seems like it's impossible considering my university courseload.

Add support for architectures on FreeBSD-14 and 15. (Both ProcessFreeBSD and ProcessFreeBSDKernelCore)
Create an extensive test suite for ProcessFreeBSDKernelCore.

Scheduler

Fix minor errors in the 4BSD scheduler. There are few notes and todo comments, check if they are completed. If so, remove them. If not, implement.
Update scheduler.9, runq.9, sched_4bsd.4, sched_ule.4
Write sched_4bsd.9 and sched_ule.9 to explain the scheduler internals and algorithms
Help olce@ for ULE 4.0
Introduce EEVDF scheduler instance in the base. Benchmark on different environments like servers, embedded, desktop, etc. See if it really improves weaknesses (e.g. latency) of the ULE scheduler.

Kernel dump

Refactor kernel dump code so we can easily introduce other dump mechanisms
Introduce kernel dump in ELF-core format that only contains used pages like minidump
Update libkvm accordingly
Update LLDB (and possibly GDB) to understand FreeBSD's kernel ELF core dump.

Contact

Email: <minsoo AT minsoo DOT io>
Discord: minsoochoo