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Harry (Hyeonggon) Yoo

@hyeyoo@social.kernel.org
akkoma 3.19.0
  • Open on social.kernel.org
A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!).

- Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present)
- A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem
- Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL)
- B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025)

Opinions are my own.

My interests are:
Memory Management,
Computer Architecture,
Circuit Design,
Virtualization
131 Followers
106 Following
21 Posts

Posts

Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · May 07, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @ljs@mastodonapp.uk
@ljs@mastodonapp.uk now time to fly back and sleep like a koala or panda
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 23, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @ptesarik@infosec.exchange
@ptesarik@infosec.exchange @axboe@fosstodon.org @ljs@mastodonapp.uk @vbabka@mastodon.social @gregkh@social.kernel.org @Aissen@social.treehouse.systems see my dominance signal, a claude subscription!
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 23, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @ljs@mastodonapp.uk
@ljs@mastodonapp.uk @axboe@fosstodon.org @vbabka@mastodon.social @gregkh@social.kernel.org @Aissen@social.treehouse.systems funk!
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 23, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @axboe@fosstodon.org
@axboe@fosstodon.org @ljs@mastodonapp.uk @vbabka@mastodon.social @gregkh@social.kernel.org @Aissen@social.treehouse.systems oh geez, that's not adding much value to the project :/
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 23, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @axboe@fosstodon.org
@axboe@fosstodon.org @ljs@mastodonapp.uk @vbabka@mastodon.social @gregkh@social.kernel.org @Aissen@social.treehouse.systems it's really sad that people do that. what do these people care then?
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 23, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @Aissen@social.treehouse.systems
@Aissen@social.treehouse.systems @axboe@fosstodon.org @gregkh@social.kernel.org @ljs@mastodonapp.uk @vbabka@mastodon.social bittersweet because people report bugs on features they don't use rather than fixing them and stepping up to help?
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 21, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @hny@mastodonczech.cz
@hny @vbabka how soon is too soon statistically?
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 21, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @vbabka@mastodon.social
@vbabka @ljs I see the problem! In Korea, it's considered inappropriate to sign using red ink. "It is a common Korean superstition that if someone’s name is written in red, then death or bad luck will come to that person very soon." Should have been blue or black :'( https://gwangjunewsgic.com/arts-culture/korean-myths/behind-the-myth-the-red-pen/
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 03, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @ljs@mastodonapp.uk
@ljs @vaurora @vbabka @ffmancera @ptesarik @brauner so the new age verification feature won't allow him to create files? poor Vlasta :(
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 03, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @hyeyoo@social.kernel.org
@sj @haoli @kernellogger @vbabka by the way how am I supposed to prove I'm Harry Potter, do I walk through Platform 9 3/4 and see if I can get through?
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 03, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @sj@social.kernel.org
@sj @haoli @kernellogger @vbabka Oh you know who it is!
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 02, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @vbabka@mastodon.social
@vbabka @ljs @ffmancera @ptesarik wait, he's probably too hench! *runs away*
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 02, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @haoli@social.kernel.org
@haoli @kernellogger @vbabka After a few more April Fool’s days I probably need to start signing my emails to prove that I am Harry ;)
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 01, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @monsieuricon@social.kernel.org
@monsieuricon @kernellogger @vbabka Oh no, he caught us, run!!
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 01, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @kernellogger@hachyderm.io
@kernellogger haha, @vbabka made my day and I just added some emojis to that ;-)
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 01, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @ljs@mastodonapp.uk
@ljs wait... then kernel dev stats do matter! re: https://social.kernel.org/notice/B4ggiRtc9FTNGCQwam
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Mar 26, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @mathieu@fosstodon.org

@mathieu@fosstodon.org

While I've been thinking rationally about this, I've a feeling a large part of our peers haven't

... that's truely concerning, yeah. It'll take some time (hopefully until it's too late) for people to realize.

My take is that the tech is "good enough" (see latest claude etc)

Yeah, it's quite good! the only problem is...

that people will keep hyping it just enough that it will justify printing more money for it.

...that it doesn't seem like the industry is making a reasonable investment or carefully applying the tech to reality.

In the long run will we see the harsh reality of this (hard to fix bugs etc)? Sure! Will it be too late ? Pretty sure that's also a yes.

Sadly yes :(

Anyway sorry my reasoning is a bit all over the place, it's just confusing times

Don't worry. It's confusing time for everybody...

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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Mar 26, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @mathieu@fosstodon.org
@mathieu@fosstodon.org How will it succeed (in an economically viable sense) if the tech isn't great? The bubble will burst at some point anyway if the tech can't back up the expectations. I feel like people have stopped thinking rationally (cuz I don't see any clue or potential that the machine is going to take over, at least for now) and are just going wild & pouring an insane amount of money into it... They'll have to face the consequences eventually, but what worries me is that it might affect the people around me (who aren't doing AI stuff). +1 for questioning my own sanity.... you're not alone! hehe
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Mar 26, 2026
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @mathieu@fosstodon.org
@mathieu@fosstodon.org seems like it's just human nature to feel enormous excitement and worry at the same time whenever a fancy new tech comes out (only to realize later it wasn't as good or bad as expected) /me stares at his stock account and wondering when to pull out (but yeah it's not just about the stock market)
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 28, 2025
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @oleksandr@activitypub.natalenko.name
@oleksandr @ljs @vbabka oh man, what have I done!
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Open post
hyeyoo
Harry (Hyeonggon) Yoo @hyeyoo@social.kernel.org · Apr 28, 2025
Harry (Hyeonggon) Yoo
@hyeyoo@social.kernel.org

A professional kernel hacker, born in August 6, 2000, and living in Korea (the South one!). - Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present) - A slab subsystem co-maintainer and a reviewer for the reverse mapping subsystem - Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL) - B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025) Opinions are my own. My interests are: Memory Management, Computer Architecture, Circuit Design, Virtualization

social.kernel.org
Replying to @oleksandr@activitypub.natalenko.name
@oleksandr @ljs @vbabka slab_ext also getting closer!
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