Posts
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Following
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Followers
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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 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
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vbabka

I reduce maintainer burnout by deleting as much of the subsystem as possible.
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hyeyoo

Harry (Hyeonggon) Yoo

Edited 1 year ago
dude that's an undefined behavior.
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hyeyoo
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sj

sj

I found yet another insightful arXiv paper exploring DAMON and finding grateful area to improve. My holiday would never be boring :)

https://arxiv.org/pdf/2311.10275.pdf

#linux #kernel #damon
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hyeyoo

Harry (Hyeonggon) Yoo

Edited 1 year ago
Oh, I shouldn't tag regzbot when a commit hasn't landed in the mainline yet :)

It isn't really a "regression" yet
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hyeyoo
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monsieuricon

K. Ryabitsev 🍁

When patchwork integration is configured, b4 will now retrieve the CI status of each patch as well.
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ljs

I just hit 1,010 pages :)

And still so much to do...
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hyeyoo

Harry (Hyeonggon) Yoo

GERMAN VILLAGE IN KOREA
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hyeyoo

Harry (Hyeonggon) Yoo

Where are you going sir
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hyeyoo
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vbabka

Edited 1 year ago
OK, enough joking, time to get serious now https://lore.kernel.org/all/20231113191340.17482-22-vbabka@suse.cz/T/
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hyeyoo

Harry (Hyeonggon) Yoo

Edited 1 year ago
there are so many batteries I should charge everyday... laptop, smartphone, smart watch and bluetooth earphones.

start to feel nervous when one of them is gone.
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hyeyoo
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monsieuricon

K. Ryabitsev 🍁

So, you want to read LKML with Gmail (experimental, testers needed)

https://lore.kernel.org/workflows/20231115-black-partridge-of-growth-54bf2e@nitro/
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LWN@fosstodon.org

LWN.net is now @LWN@lwn.net

[$] Faster kernel testing with virtme-ng https://lwn.net/Articles/951313/

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monsieuricon

K. Ryabitsev 🍁

PSA: we're only a few weeks away from Linux Kernel 6.6.6.
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hyeyoo

Harry (Hyeonggon) Yoo

Edited 1 year ago
A few diagrams about PCIe. 1) An example PCIe topology 2) PCIe Switch and 3) Root Complex
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hyeyoo

Harry (Hyeonggon) Yoo

This is why I go to the gym
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hyeyoo

Harry (Hyeonggon) Yoo

what, there's a script to import linux kernel headers to QEMU.

From commit 412a8245 ("pci_regs.h: import from linux"):
```
It seems to make sense to import pci_regs.h from linux: why maintain our own?

As a first step, move the header to standard-headers, and add it to the update script.
```
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securepaul@fosstodon.org

Paul Moore

I'm a little surprised and disappointed that the 2023 Linux Foundation TAB election only has five candidates running for the five open seats. All five of the candidates are existing TAB members.

It would seem like one of the issues the TAB should focus on this year is getting more people interested in TAB participation.

https://lore.kernel.org/lkml/e851a8e5-c4c2-4b5d-887a-509e591cff49@intel.com

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hyeyoo

Harry (Hyeonggon) Yoo

Edited 1 year ago
A big barrier to reading and analyzing code is a psychological resistance to reading unfamiliar text
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hyeyoo

Harry (Hyeonggon) Yoo

What kind of benchmark is it
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hyeyoo

Harry (Hyeonggon) Yoo

Edited 1 year ago
TIL:

DMA in PCI(e) means a device initiates memory read/write transactions.

But how to make a device initiate such a transaction is device-specific (i.e. a device implements a DMA command via its registers)

Wondering if a DMA interface can be added to CXL.io protocol so that page migrations can be done in a peer-to-peer manner without host interference. (in systems with multiple memory tiers)
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