Posts
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98Followers
115- 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
Harry (Hyeonggon) Yoo
hyeyooI was hit by BUG_ON() because I enabled CONFIG_DEBUG_VIRTUAL=y.
It made my machine crash and I wrote and sent a quick hack to fix this.
https://lore.kernel.org/lkml/CAB=+i9QiJ=BXkQuCFJTh3dMXrkKQvVA2EM51Mj6SsDMimWQ71g@mail.gmail.com
Today I learned:
- Better to use proper tags for regzbot next time I report something, don't make @kernellogger do that instead of me.
- __init and __exit are compiler attributes that makes functions to be in specific ELF sections (.init.text and .exit.text), to drop portions of unused kernel code.
- When a kernel feature is built into kernel rather than built as a module, functions marked __init are dropped after initialization and functions marked __exit are dropped and never used. because you can't unload a built-in kernel feature ;)
- Some architectures drop .exit.text section at link time, but some drop at runtime. this is due to complexity of link-time reference counting between functions (? which I have no idea yet)
- On architectures that drop it at runtime, functions marked __exit are dropped in free_initmem() because .exit.text section is between __init_begin and __init_end.
- I need an automatic bisection system to save time in the future.
One piece of information I'm missing here is why it did not crash before the commit :(
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Thorsten Leemhuis (acct. 1/4)
kernellogger@fosstodon.org2/…patches from new or rare contributors should have some kind of tag to indicate things like
(1) I have no interest in learning how to do things better, I just want it fixed; I'm thus happy if someone dramatically changes the patch or writes a better one.
(2) I'd really like to learn how to do this properly, hence would be grateful if someone could guide me somewhat.
Why? Well, misunderstandings here can be annoying and a waste of time for both sides (and lead to situations like the above).
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Thorsten Leemhuis (acct. 1/4)
kernellogger@fosstodon.org"[…] Instead of accepting my [#LinuxKernel] patch or guiding me towards a better solution, he went ahead and implemented his own fix, giving me credit only for reporting the issue […]
My first contribution to the [#Linux] #kernel was a really frustrating and discouraging experience, dealing with people who do not think it’s important to get proper recognition for your work. […]"
https://ariel-miculas.github.io/How-I-got-robbed-of-my-first-kernel-contribution/
1/ Side note: I sometimes wonder if…
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Harry (Hyeonggon) Yoo
hyeyoo
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Liam @ GamingOnLinux 🐧🎮
gamingonlinux@mastodon.socialRaspberry Pi 5 announced - still tiny, much more powerful https://www.gamingonlinux.com/2023/09/raspberry-pi-5-announced-still-tiny-much-more-powerful/
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Dare Obasanjo
carnage4life@mas.toWelcome to the cycle of generative AI making search worse.
Quora uses ChatGPT which hallucinates an answer to a nonsense question.
Google Search picks up this nonsense answer from Quora which has high page rank and treats it as an instant answer.
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Drew Fustini
pdp7@fosstodon.org@vegard did you bring the concurrency cheat sheet? It's great!
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K. Ryabitsev 🍁
monsieuriconI'll document after some more initial testing.
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Harry (Hyeonggon) Yoo
hyeyooit took few weeks due to issues with hardware :(
this is home server so can't provide excellent stability and uptime but here it is:
https://lava.kerneltesting.org
https://jenkins.kerneltesting.org
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Harry (Hyeonggon) Yoo
hyeyoobut 32gib for a browser was too much? was it memory leak?
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