MM101: Introduction to Linux Memory Management

on YouTube ↗39m

" summary

Explains Linux paging with 4 KB pages and page frame numbers (roughly one million pages per 4 GB), virtual vs physical vs swap, copy‑on‑write and the zero page trick, and read‑ahead behavior (example: 512 KB prefetch). Shows how to inspect memory with /proc/meminfo, /proc/<pid>/status, free, top and dmesg and interprets fields like VmPeak, VmRSS and VmSwap. Covers ulimit, sysctl overcommit modes overcommit=0/1/2, swap usage, and tuning knobs like dirty_ratio and dirty_writeback_centisecs.

AI-written summary · about

" chapters (14)

1. 0:00Introduction
2. 0:53Memory Processes
3. 1:39Page Frames
4. 3:44Page Tables
5. 7:01Memory Map
6. 9:43Special Pages
7. 16:49System Program Info
8. 22:04Inspecting Memory Use
9. 24:29Memory Limits
10. 25:28Overcommit
11. 27:29Dirty Things
12. 30:41Contact Christopher
13. 31:07Questions
14. 37:43Conclusion

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