Posts
474
Following
89
Followers
94
n00b Kernel Hacker
- Ex-Intern @ NVIDIA Korea (Security System Software) (2024.06-2024.11)
- Ex-Intern @ Panmneisa (CXL emulation stuff) (~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
hyeyoo

Hyeonggon Yoo

Reply to @ljs
@ljs yes this semester is finished and it's summer break!
(but still have 3 semesters left T.T)

btw I was supposed to do an internship at a cloud company this year but seems I am almost ditched so now looking for undergraduate research internships :P
0
0
2
hyeyoo

Hyeonggon Yoo

Reply to @ljs
@ljs no it's all done but my timezone is still shifted
1
0
2
hyeyoo

Hyeonggon Yoo

still haven't recovered from jet lag (?) from the final exam period. today went to bed at 11 PM, woke up at 2 AM, and it's now 6 AM.
1
0
1
hyeyoo

Hyeonggon Yoo

Edited 1 year ago
sometimes wanna stop posting normally and just shitpost all the time
1
0
2
hyeyoo

Hyeonggon Yoo

Reply to @ljs
@ljs @kernellogger @sj

or a prompt confirming if you really know what you're doing ;)

BTW what would be different if it were in /sys/kernel/mm?
1
0
1
hyeyoo

Hyeonggon Yoo

Edited 1 year ago
started wondering where it's documented that x86 processors deal with the synonym problem, as they use VIPT data caches.

on ARMv8 processors there is an architectural guarantee that data caches acts as PIPT cache even if it's actually VIPT, so it's guaranteed not to suffer from D-cache aliasing.

I've been heard that there is a similar guarantee on x86 processors but haven't found any official references about it - errr, I guess it's time to read some part of the intel manual.

btw this is quite old but is very nice introduction:
https://www.linuxjournal.com/article/7105
1
1
1
hyeyoo

Hyeonggon Yoo

Reply to @ljs
@ljs @kernellogger @sj

LOL what
you mean /proc/sys/vm/drop_caches?
1
0
1
hyeyoo

Hyeonggon Yoo

Reply to @ljs
@ljs @kernellogger @sj

Ah, I added sj because IIRC he's planning implement an auto tuner for DAMON parameters - no one should be like "bpftune can tune everything and make more parameters"

it would have been horrible if i.e. active/inactive list balancing was implemented as a kernel parameter :P
1
0
1
hyeyoo

Hyeonggon Yoo

Reply to @ljs
@ljs @kernellogger @sj

That's a perspective I didn't have, and it makes sense. So, it's like performing CPR on this messed-up situation?
1
0
1
hyeyoo

Hyeonggon Yoo

Reply to
Edited 1 year ago
@kernellogger

@sj you might be interested in adapting DAMON parameters?
btw I wonder how broad range of parameters could be covered
2
0
0
hyeyoo

Hyeonggon Yoo

Reply to
@kernellogger WOW that is amazing work!
0
0
0
hyeyoo

Hyeonggon Yoo

Reply to @vbabka
Edited 1 year ago
@vbabka @ljs would running mm-stable make it stable again? 🥲 I didn't threw it away yet
1
0
2
hyeyoo

Hyeonggon Yoo

Reply to @ljs
@ljs please do the same to overgrown MM code
0
0
2
hyeyoo

Hyeonggon Yoo

Reply to
@cwayne @ljs is it better than normal tablets (like ipad)?
1
0
1
hyeyoo

Hyeonggon Yoo

Edited 1 year ago
I bought a new graphics card yesterday, and it came with a freebie. now my machine hangs whenever I boot a kernel with lockdep enabled.

Here is the link to the issue I posted on GitLab: https://gitlab.freedesktop.org/drm/nouveau/-/issues/237

BTW does DRM folks prefer using GitLab or the mailing list?
0
0
2
hyeyoo

Hyeonggon Yoo

I want NVIDIA's proprietary GPU drivers 🥲
nouveau does not support virtual GPUs...
0
0
0
hyeyoo

Hyeonggon Yoo

Edited 1 year ago
I was refreshing my zsdesc patch series but encountered unrelated bug while testing (I bought new RAM so it must be software bug...)

Fortunately it was bisectable and I'm writing a report about it
Not sure if people will welcome an oops image instead of text format.
0
0
1
hyeyoo

Hyeonggon Yoo

a funny thing about memtest is that it can fail due to memory failure.
0
0
2
hyeyoo

Hyeonggon Yoo

Reply to @hyeyoo
@ljs gotcha!
1
0
1
hyeyoo

Hyeonggon Yoo

Reply to @hyeyoo
@ljs hmm I tried to boot using two different bootable USBs but both says something has been corrupted. It makes me think the kernel may be innocent
1
0
2
Show older
About social.kernel.org

Terms of service

  1. Please do not use this service in violation of the Linux Kernel Code of Conduct. Doing so will result in your account suspension with the referral of the matter to the CoC committee.

  2. "Repeating"/"boosting" someone else's status on this platform will be treated as endorsement and will fall under rule #1.

  3. You are encouraged to use this platform to promote your work on the Linux Kernel, but there is no restriction on permitted topics (with the exception of anything covered by #1 above).

  4. There is no requirement to post in English, but it should be considered the primary language of communication on this platform.

Privacy notice

The admins of this service have access to all posted statuses. They aren't looking, but if it's something they shouldn't know about, then you should not post it on this platform.

Please see the Linux Foundation Privacy Policy, which applies to this platform as well.

Getting your own account

If you would like an account on this instance, please check that the following applies to you:

  • You are listed in MAINTAINERS or CREDITS

  • OR: You have a kernel.org account or email address

  • OR: You have a long and established history of involvement with the Linux Kernel

If the above is true and you agree with the Terms of Service and Privacy Notice listed above, please use these instructions to request an account: