social.kernel.org

Hyeonggon Yoo

@hyeyoo

Posts

476

Following

91

Followers

93

n00b Kernel Hacker
- Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present)
- Ex-Intern @ SK Hynix (Linux Kernel MM) (2024.12 ~ 2025.01)
- Ex-Intern @ NVIDIA Korea (Security System Software) (2024.06 ~ 2024.11)
- Ex-Intern @ Panmneisa (CXL emulation stuff) (2023.09 ~ 2023.12)
- Undergraduate majoring CSE (estimated graduation: Feb. 2025)
- Working as reviewer at Linux Slab subsystem
- Born in August 6, 2000

Opinions are my own.

My interests are:
Memory Management,
Computer Architecture,
Circuit Design,
Virtualization

Hyeonggon Yoo

hyeyoo

Reply to

@lkundrak @vbabka
the correct pronunciation should be thoroughly documented 😂

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Hyeonggon Yoo

hyeyoo

Reply to @hyeyoo

Edited 1 year ago

@vbabka @lkundrak

why not call it just slab instead when we have only single implenentation ;)

and yeah there someone might suggest new implementation in the future but it should replace existing one to be merged... or we will have tens of allocators again (and run out of letters)

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Hyeonggon Yoo

hyeyoo

Reply to @vbabka

@vbabka @lkundrak

Oh, lol I don't even know how to pronounce it 😂

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Hyeonggon Yoo

hyeyoo

Reply to @vbabka

Edited 1 year ago

@vbabka

Wow, 10 years.

I always hope to accumulate sufficient experience as an engineer but also don't want to get older... but can't have both :(

congrats anyway!!

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Hyeonggon Yoo

hyeyoo

Reply to @vbabka

@vbabka @lkundrak
Not sure I follow ;) where is the PR?

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Hyeonggon Yoo

hyeyoo

Edited 1 year ago

@ljs yes, you have never been boring ;)
just asked because I thought maybe your post could be about you but I think you are not.

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Hyeonggon Yoo

hyeyoo

@ljs do you think you are boring?

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Hyeonggon Yoo

hyeyoo

@ljs Being a boring person, not getting bored by others?

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Hyeonggon Yoo

repeated

Krzysztof Kozlowski

krzk

Edited 1 year ago

It was great to see at the EOSS 2023 commitments from some ARM64 SoC manufacturers to upstreaming their SoCs. It was visible in the conference talks but also I got such clear vibes during the talks behind the scenes.
What was a bit missing is a story of Qualcomm which recently is heavily visible upstream - both directly and through the Qualcomm Landing Team in Linaro. November last year Qualcomm released its newest, shiniest mobile SoC: the Snapdragon 8 Gen 2 (SM8550).
And guess what happened? The next day you could find all the Linux kernel support for this new SoC on the mailing list. The newest SoC was released with upstream support at the same time. There is also story from @superna9999: https://www.linaro.org/blog/upstream-linux-support-now-available-for-the-the-qualcomm-snapdragon-8-gen-2-mobile-platform/
#eoss2023 #elce2023 #EmbeddedOSSummit

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Hyeonggon Yoo

hyeyoo

Reply to @hyeyoo

Edited 1 year ago

BTW CXL is very hot technology even though it's supposed to hold cold data ;)

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Hyeonggon Yoo

hyeyoo

https://2023.openinfradays.kr/schedule/day2

OCP APAC Techday is being held today in Seoul. Most of sessions are about CXL, AI, SSD. Still not sure if sessions are in english or korean.

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Hyeonggon Yoo

hyeyoo

@ljs @lkundrak

(Misunderstanding) The Linux Memory Manager

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Hyeonggon Yoo

hyeyoo

Reply to @hyeyoo

my laptop is screaming

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Hyeonggon Yoo

hyeyoo

Reply to

Edited 1 year ago

@zeroday0619 @yuno

생각보다 돈버는 것 자체는 어렵진 않은거같아요
자기 자신에 대한 기준이 높아서 그렇죠.

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Hyeonggon Yoo

hyeyoo

Edited 1 year ago

Something strange is always found while running and experimenting new development kernels

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Hyeonggon Yoo

hyeyoo

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Hyeonggon Yoo

hyeyoo

Reply to @hyeyoo

@ljs @vbabka But based on the Korean age system and law I was old enough to drink, still don't know why she asked

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Hyeonggon Yoo

hyeyoo

@ljs @vbabka yup I tried to get wine on a flight around my 18th birthday, and the stewardess asked if I'm over 18. my birthday is August 6 and it was August 6 in South Korea and August 5 in the US, and the flight was on the Pacific Ocean ;) but I got the wine anyway

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Hyeonggon Yoo

hyeyoo

Reply to @vbabka

@vbabka

Designing VIPT caches where size/associativity <= PAGE_SIZE is a way to avoid the synonym problem, no?

It gets tricky when size/associativity > PAGE_SIZE and it seems both Intel and ARM have patents to deal with it

https://patents.google.com/patent/US11314647B2/en
https://patents.google.com/patent/US20070033318A1/en

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Hyeonggon Yoo

hyeyoo

@ljs LOL yes but I have never thought this was weird; it has been like this for a long time.

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