Advanced · Module 8 · Lesson 10 of 11
Linux io_uring: Completion-Based Asynchronous I/O
Understand Linux io_uring submission and completion queues, registered resources, and the difference between readiness and completion.
Pro — members onlyAbout 18 minutes
By the end you can
- Explain io_uring's shared submission and completion queues
- Distinguish readiness-based epoll from completion-based operations
- Track user data across asynchronous requests
- Identify lifetime and cancellation hazards
Builds on High-Performance Event Multiplexing: Linux epoll Architecture.
01 · A question first
epoll tells you that an operation may proceed, but your program still performs the operation. What changes when the kernel performs the operation and later reports its completion?
Make a guess before you read on.
02 · The idea
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What's inside
- The completion-based model
- Queue lifecycle
- Ownership and cancellation
- Where it fits
- Operational checklist
- Boundary cases
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