eBPF: tracing syscalls without a kernel module
Attaching a verified program to a tracepoint, and why this beats strace under load.
Linux
Tuning TCP BBR and fq on a high-latency link
Switching off loss-based congestion control on a long-fat path, and the fq gotcha for UDP.
A first, honest look at io_uring
Two ring buffers, one syscall, and the mental model that finally made it click.
Notes on cgroups v2: memory limits that actually hold
Why my OOM kills moved around after switching to the unified hierarchy, and the three knobs that matter.