Labels

Barrier affecting people with disabilities

The kernel build matrix, containers, CI and the drift bot

The three tracks: filesystem, driver and sched_ext scheduler

Locking, RCU, per CPU data, the memory model and PREEMPT_RT

Oops reports, KASAN, lockdep, drgn, fault injection and syzbot

The driver model, modules, sysfs and debugfs

Virtual memory, page faults, the allocators, folios, reclaim and cgroups

Interrupts, deferred work, the receive path, sockets and eBPF

Sequencing, the beginner ramp and assessment

Tasks, fork and exec, the scheduler, context switching and signals

The book site, WASM export, versioning, hosting and accessibility

VFS, path resolution, the page cache, filesystems and the block layer

Syscall entry, the stable ABI, the syscall table and the userspace boundary

v86, the browser kernel image, the rootfs and the notebook bridge

Good for newcomers

Extra attention is needed

A manim scene or the mobject library

A normative specification fragment

Something is wrong, stale or mis-cited

Build, CI, dependencies and repository plumbing

The oracle stack, the corpora and the scorecard

A recorded trace, snapshot, oops or BTF dump the lessons are graded against

A lesson: prose, notebook, experiments, boss fight

A milestone checklist, tracking the issues that close it

A question that must be answered by measurement before work depends on it

Investigation that produces a written answer rather than an implementation

kxray, kxprobe, kxbox, bpc, the widgets and the checkers

Blocks the current milestone

Needed for the current milestone but not blocking today

Wanted, not scheduled