// TAG

#Linux Kernel

Posts in this collection, ordered newest first.

202606.16

SystemsJun 16, 202612 min read

Explains the structure, lookup and update behavior, eviction policy, concurrency model, and use cases of BPF LRU per-CPU hash maps.

202606.14

SystemsJun 14, 202611 min read

Explains the fields in a process control block, process state transitions, and its role during context switches.

202606.10

SystemsJun 10, 202615 min read

Explains the eBPF load, verification, and execution pipeline, with a focus on maps, helpers, and attach points.

202606.10

SystemsJun 10, 202613 min read

Explains why classic BPF filters packets in the kernel and how its filter instructions, virtual machine, and tcpdump workflow fit together.

202606.05

SystemsJun 05, 20263 min read

Compares spinlocks and mutexes by waiting behavior, context-switch cost, and the conditions under which each is appropriate.

202604.12

SystemsApr 12, 202610 min read

Explains the in-kernel eBPF execution model through its registers, bytecode, verifier, JIT compiler, helpers, and maps.