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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
Supposed to be a sandwich, heh
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@ljs Hail protein ᕙ(⇀‸↼‶)ᕗ!
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Pulled pork egg slice salad, since sandwich bread is on the way home :)
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Harry (Hyeonggon) Yoo

Edited 8 days ago
@vbabka You're not alone, I'm nervous about it too..!
Crossing fingers for the two major changes...
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Harry (Hyeonggon) Yoo

Edited 9 days ago
I'm thinking of making sandwiches on my own, as buying two a day really adds up each month! I just need to be careful not to make them too big and end up gaining weight...
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@ljs @hny @vbabka

Haha I misread it then!
Yeah that's what life is...
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@ljs @hny @vbabka

not sure what's going on but hope everything goes well 🙏
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Linux 6.18 sched_ext Preps For Cgroup Sub-Scheduler Support

The sched_ext scheduler framework that allows creating kernel thread schedulers via BPF programs is ready with some updates for the Linux 6.18 kernel...
https://www.phoronix.com/news/Linux-6.18-sched-ext

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@sj @ljs @vbabka Maybe you made the right decision, since @vbabka deletes everything he can!
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@ljs yeah still going to gym 5 days / week
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@vbabka @ljs @sj
Wait, CXL is there!
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@vbabka @sj @ljs

Oh no, you can’t boot your kernel without Slab :(
Very Important Piece of MM :)
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Harry (Hyeonggon) Yoo

Edited 11 days ago
@ljs

Aww thanks <3 <3
Sandwich diet is working..!
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Harry (Hyeonggon) Yoo

Taking random photos alone on Saturday
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@ptesarik
Making LLMs much more offensive!
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Vlastimil Babka 🇨🇿🇪🇺🇺🇦

This week I once again had a great time at @KernelRecipes ! Thanks a lot for inviting me, and for organizing such a nice conference! (and also for all the nice speaker and attendee gifts :)

Also glad we increased the SUSE presence from just me last year to 4 people this year! (which miraculously required only 2 more people to attend, who weren't there last year).

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@ljs
Hope you had fun!
Now time for vacation :)
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A big issue in the kernel are asymmetries between review resource and patch submission.

If you have 20 inexperienced kernel engineers all doing big difficult work and submitting large series that need TONS of review (and sometimes essentially development-via-review) and only a few reviewers, you have a problem.

What compounds this is that not all review is equal.

It seems most people will only really look at the surface, and rather happily give tags.

I think that technical skill is not enough for review [as I have said very often - soft skills are the actually core ones] - you have to be willing to say no, you have to be willing to consider the wider picture.

Finding people who have the right skills, are willing to handle the stress + thanklessness, & who have the time is not easy.

So the asymmetry I think is insoluble.

It'd be good if we could have stricter controls to throttle incoming series though.

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Harry (Hyeonggon) Yoo

Edited 25 days ago
@ljs @jann @alwayscurious @vbabka That's one of my projects for next year, planning to start by writing an RFC around the end of this year :)
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Harry (Hyeonggon) Yoo

Edited 1 month ago
@wagi @ljs
It’s great that you’re already doing a lot of cardio!
Do you have any plans for eating in mind?
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