io_uring - BPF Controlled I/O

Explore the intricacies of io_uring and BPF controlled I/O in this informative conference talk by Pavel Begunkov at the Linux Plumbers Conference. Delve into various aspects of the technology, including request types, resource registration, request execution, and common misconceptions. Learn about tight loops, batching, and SQ Pole requirements. Discover the dump idea, BPF requests, linking, and the Completion Queue. Examine user space memory, overhead considerations, and API submission details. Gain insights into BPF helpers and examples, and understand the results and future directions of this technology. Acquire valuable knowledge about io_uring and its integration with BPF for enhanced I/O control in Linux systems.

Intro
Outline
Request types
Register resources
Executing requests
Misconceptions
Tight loop
Batching
SQ Pole
Requirements
Dump idea
BPF request
Linking
Completion Queue
User Space Memory
Overhead
API
Submission
Reminders
BPF helpers
BPF example
Results
Next steps
Resources