Linux Locking and RCU

1. Locking index

   Kernel locking primitives overview.

2. Lock types and their rules

   Spinlocks, mutexes and PREEMPT_RT behavior.

3. Lockdep design

   Lock class validation and deadlock detection.

4. Mutex design

   Optimistic spinning and mutex fast paths.

5. Seqlock

   Sequence counters and writer locks.

6. Memory barriers

   Memory ordering guarantees and barriers.

7. RCU concepts

   Read-copy-update read side and grace periods.

8. RCU whatisRCU

   API walkthrough of RCU primitives.

9. RCU checklist

   Rules for correct RCU use including rcu_read_lock, rcu_dereference and synchronize_rcu.

10. Futex requeue PI

    Priority inheritance futex requeue.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.