Fundamental of Virtual Memory

Posted3 months agoActive3 months ago

signa11

49 points

10 comments

nghiant3223.github.ioTechstory

skepticalmixed

Debate

40/100

Virtual MemoryOperating SystemsComputer Science

Key topics

Virtual Memory

Operating Systems

Computer Science

The article discusses the fundamentals of virtual memory, but the discussion is marked by skepticism about the article's accuracy and simplicity.

Snapshot generated from the HN discussion

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Light discussion

First comment

38m

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0-6h

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Key moments

01Story posted
Sep 27, 2025 at 11:28 AM EDT
3 months ago
Step 01
02First comment
Sep 27, 2025 at 12:06 PM EDT
38m after posting
Step 02
03Peak activity
3 comments in 0-6h
Hottest window of the conversation
Step 03
04Latest activity
Oct 1, 2025 at 7:37 AM EDT
3 months ago
Step 04

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Discussion (10 comments)

Showing 10 comments

alain94040

3 months ago

2 replies

I don't particularly recommend this article, it's a little bit too simplistic and the reasons given are not quite right.

abhi_kr

3 months ago

3 replies

What would you recommend to learn this topic in detail with accuracy?

fusionadvocate

3 months ago

We can only hope the parent comment indeed knows a better source or even what he is talking about. Let give him the benefit of the doubt and assume that the shortness of his comment derives from a lack of time and not from a lack of knowledge.

r4um

3 months ago

A must read would be "What Every Programmer Should Know About Memory"[1], Section 4 covers Virtual Memory.

[1] https://people.freebsd.org/~lstewart/articles/cpumemory.pdf

checker659

3 months ago

Background : Operating Systems: 3 easy pieces

ISA/OS level: Architectural and Operating System Support for Virtual Memory

(Both are books)

signa11Author

3 months ago

1 reply

don’t be shy :o), please do recommend alternatives !

tux3

3 months ago

1 reply

Pssh, real developers read volumes 1, 3A, 3B, 3C, and 3D of the Intel® 64 and IA-32 Architectures Software Developer’s Manual Combined Volumes, pages 3125 through 4200

And if you have a steady hand, a magnetized needle and a hard drive can be used for practice exercises.

signa11Author

3 months ago

1 reply

do you have similar references for risc-v ?

tux3

3 months ago

1 reply

The RISC-V privileged spec describes their paging implementation (under the Supervisor-level ISA), while the unprivileged spec has a chapter and two appendices describing their memory model (RVWMO), formal axiomatic and operational models included.

Finding the inevitable bugs in the formal model is left as an exercise to the reader (three bugs where the axiomatic/operational models disagree are already known).

If you want a more gentle introduction, the Computer Organization and Design book is pretty nice.

signa11Author

3 months ago

the book, I have gone through (yes, exercises too :o), fwiw) thanks for the risc-v reference.

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