Posts
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Following
101
Followers
118
A relatively new professional kernel hacker, born in August 6, 2000, and living in Korea (South!).

- Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present)
- Reviewer for the Linux Slab & 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
hyeyoo

Harry (Hyeonggon) Yoo

Reply to @ljs
@ljs @lkundrak @vbabka

for clarification is it a joke or seriously?
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @ljs
@ljs @lkundrak @vbabka

Kernel community
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hyeyoo
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vegard@mastodon.social

Vegard

We don't have enough kernel memes on here, just doing my part

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hyeyoo

Harry (Hyeonggon) Yoo

Edited 10 months ago
init_task is not the task_struct of the init process but of the swapper process.
It confuses me every time.
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @ljs
@ljs @lkundrak @vbabka

Oh I see. I thought you three just met in person to have a beer together.
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @ljs
@ljs @lkundrak @vbabka

Ohhh you guys gathered in person! Is it in the Czech? England?

Btw I'm disappointed that @lkundrak isn't equipped with a hammer to smash filesystems
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hyeyoo

Harry (Hyeonggon) Yoo

why is rsync painfully slow when backing up the root filesystem
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hyeyoo
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LWN@fosstodon.org

LWN.net is now @LWN@lwn.net

Several Russian developers lose kernel maintainership status

https://lwn.net/Articles/995186/

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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @ljs
@ljs @vbabka @lkundrak

It has gotten long as it has a bit of history :P

- Someone fixed a memory leak but introduced a double-free.
- Another person fixed the double-free, reintroducing the leak.
- A third person then fixed the leak, but reverted it after noticing it introduced another double-free.

It's been there because handling all error cases properly is complicated. Luckily, it's a kind of bug that someone is very unlikely to encounter, and it only leaks 32 bytes of memory.
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hyeyoo
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lkundrak@metalhead.club

AGRO TURBO.EXE SATAN 🇺🇦🇨🇿

Reply to @hyeyoo

@hyeyoo @ljs oh that is my favourite
👉 social media influencer
👉 ape
👉 son of a fish

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hyeyoo

Harry (Hyeonggon) Yoo

Submitting my school assignment for “Contributing to Open Source Projects” class to linux-mm

https://lore.kernel.org/linux-mm/20241021091413.154775-1-42.hyeyoo@gmail.com/T
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hyeyoo

Harry (Hyeonggon) Yoo

@ljs on the news
https://www.phoronix.com/news/Linux-Lightweight-Guard-Pages
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vbabka

Reply to @ljs
@ljs @jann big congrats!
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @lkundrak@metalhead.club
@lkundrak @vbabka

It reminds me of Vlasta's old LWN articles named "Patching until the COWs come home"

part 1 - https://lwn.net/Articles/849638/
part 2 - https://lwn.net/Articles/849876/
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hyeyoo

Harry (Hyeonggon) Yoo

I spent last week debugging why my machine was dead. The symptom was that it would turn off right away when it's turned on. I suspected the root cause was either the CPU, memory, motherboard, or power supply failing. So I replaced every component with parts from another computer, but it still didn't work.

The root cause was that the power button of the case was broken, causing it to always appear as if it was pressed, so it would turn off every time I turned it on. That was totally unexpected. I just replaced the power line with the reset line and it works fine now.
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @vbabka
@vbabka @lkundrak
... maybe it was in the textbook in middle school?
wait, 'prion' is a pun here!
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @lkundrak@metalhead.club
@lkundrak @vbabka

Ohhh wait mad cow disease I've heard of it!
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @vbabka
@vbabka

lol how do you even know this acronym exists
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @vbabka
@vbabka I think I'm gonna take a picture in this exact pose at my ceremony next year for certified B.S.E. idiots
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hyeyoo

Harry (Hyeonggon) Yoo

Edited 11 months ago
not sure why it's so common to refer USB flash drives simply as 'USB' in Korea.

once I asked my friend:
me: Can I borrow your USB flash drives?
friend: Why are you saying like that? you can just ask to borrow 'USB'
me: Well, USB is just a bus specification...
friend: What... (she gave a really weird look)
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