Posts
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114- 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
hyeyoo
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I got a reply from Lenovo HW team. For a reason that I don't understand, he said a part of 32GB DIMM belongs to a dual channel with 8GB DIMM and the remaining part belongs to a single channel thus a separate NUMA node.
```
[...]
the summary is that the performance for the two nodes is different. Node 0 is dual channel interleaved whereas Node 1 is single channel - so this is working as designed.
[...]
```
https://forums.lenovo.com/t5/ThinkBook-Laptops/BIOS-problem-Bogus-NUMA-configuration-on-thinkbook/m-p/5260517?page=1#6212698
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Harry (Hyeonggon) Yoo
hyeyoo```As of December 18, 2023, the post-migration process for Mojang accounts has officially ended```
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My next plan for this winter vacation is to do a research project in compilers with a group of students (at Purdue University, USA)
After that, I don't know. Maybe another internship or just prepare for graduation and do some patches.
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Harry (Hyeonggon) Yoo
hyeyooNow trying to do some work (a little) on CXL emulation in QEMU, though I'm not sure how far I want to pursue as my heart is still in MM.
https://lore.kernel.org/linux-cxl/20231222090051.3265307-1-42.hyeyoo@gmail.com/T
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rob pike
robpike@hachyderm.ioThis link captures the confusion about how to pronounce "fsck":
https://lwn.net/Articles/190223/
Here's the truth. Ted Kowalski, username frodo, may he rest in peace, was the original author, just down the hall from my office in Murray Hill, and his name for the program had a 'u' where there is now an 's'. Management made him change it for distribution, but they couldn't make him change his pronunciation.
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Nathan Chancellor
nathanchance@fosstodon.orgInteresting post from the Android Rust compiler team:
https://android-developers.googleblog.com/2023/12/faster-rust-toolchains-for-android.html
Seems to line up with my benchmarks for performing a lot of the same optimization techniques to LLVM and clang and it is cool to see the amount of savings that this translates to for CI. Reminds me that I should look at integrating my kernel.org LLVM builds into tuxmake so that we can use them with tuxsuite…
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