Posts
527
Following
99
Followers
116
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 @vbabka
@vbabka @MASTERBOOTRECORD

what, already infected even before I buy it?
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @hyeyoo
Called several school departments today and regained access to the e-learning site :P
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @vbabka
@vbabka @MASTERBOOTRECORD

wow, that's quite a blast from the past!

did it end up infecting other computers as well, or mess up your computer?
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @vbabka
@vbabka @MASTERBOOTRECORD

How have you managed to boot without master boot record?
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to
@vbabka @kernellogger @sj @ljs

the strategy of utilizing LLMs for documentation might be useful for motivating someone to think "Oh, this is a piece of shit, I should completely rewrite it"
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hyeyoo

Harry (Hyeonggon) Yoo

Edited 2 years ago
I was unable to access my school's e-learning site this morning. Turns out I was expelled from school for unknown reason. I was panicking, but a school employee called me to say that there was a mistake while processing scholarship for school tuition and everything will be fine.
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hyeyoo

Harry (Hyeonggon) Yoo

off and off
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @ljs
@ljs @cwayne @vbabka
Don't forget to mention me when discussing
g dumb idiots
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to
@kernellogger @ljs

lol there are already so many obstacles in this driver's way
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to
@kernellogger @ljs

I use KVM only for kernel development and virtualbox/vmware for other work.

Because I'm not familiar with KVM yet,
maybe this is the chance to completely migrate to KVM ;)
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hyeyoo

Harry (Hyeonggon) Yoo

Edited 2 years ago
looks like @ljs 's changes to GUP broke my out-of-tree virtualbox driver. out-of-tree drivers suck :P
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @ljs
Edited 2 years ago
@ljs @ptesarik Yes! "might be the case" was was not clear ;)
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @hyeyoo
Edited 2 years ago
@ptesarik @ljs

I thought maybe freeing unnecessary vmemmap pages for HugeTLB pages might be the case, but it seems to remap to first vmemmap page. And if I am not mistaken pfn_valid() will return true for them.
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hyeyoo

Harry (Hyeonggon) Yoo

Starting to like Joan's drawings more
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hyeyoo

Harry (Hyeonggon) Yoo

TIL: NUMA configuration and distance matrix are parsed from device trees, ACPI, or dummy configuration is used.
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hyeyoo

Harry (Hyeonggon) Yoo

Edited 2 years ago
Videos of LSFMMBPF Summit / OSSNA sessions are now available on Youtube:


https://youtube.com/playlist?list=PLbzoR-pLrL6rlmdpJ3-oMgU_zxc1wAhjS

https://youtube.com/playlist?list=PLbzoR-pLrL6p445pIqTLUIzsceFp_puSy
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to
@ptesarik @ljs

When do usable PFNs (for which pfn_valid() is false) exist?
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @vbabka
LMAO probably should launch more like the north one?
(...learning how to make a joke...)
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hyeyoo

Harry (Hyeonggon) Yoo

South Korea's space rocket Nuri launched

https://en.yna.co.kr/view/AEN20230524009656320
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hyeyoo

Harry (Hyeonggon) Yoo

Reply to @ljs
@ljs @vbabka Can't even imagine what it was like before CoC was introduced.
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