Harry (Hyeonggon) Yoo
Posts
491Following
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112- 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
Harry (Hyeonggon) Yoo
repeated
repeated
Jonathan Corbet
corbet
On the radar: GCC security policy
I want to try a little experiment here. As I spend my day screwing around on the net, I come across a lot of conversations that may or may not eventually make good LWN articles. I'll toss one of those out here occasionally and see if people find it useful. Appearance here does not mean that I will (or will not) write something about it later, only that it has caught my attention.
The first topic is a few weeks old but still possibly interesting: the GCC folks are working to hammer out a security policy, which comes down to laying out what does — or does not — constitute a GCC security bug:
https://lwn.net/ml/gcc-patches/CAGWvny=z1yotE-6geJL1j80qSeZU67h-ZENPowM=BSNm0nHOVA@mail.gmail.com/
Strangely enough, it turns out that if you feed untrusted source to the compiler and the result bites you, they don't think it's a compiler bug.
I want to try a little experiment here. As I spend my day screwing around on the net, I come across a lot of conversations that may or may not eventually make good LWN articles. I'll toss one of those out here occasionally and see if people find it useful. Appearance here does not mean that I will (or will not) write something about it later, only that it has caught my attention.
The first topic is a few weeks old but still possibly interesting: the GCC folks are working to hammer out a security policy, which comes down to laying out what does — or does not — constitute a GCC security bug:
https://lwn.net/ml/gcc-patches/CAGWvny=z1yotE-6geJL1j80qSeZU67h-ZENPowM=BSNm0nHOVA@mail.gmail.com/
Strangely enough, it turns out that if you feed untrusted source to the compiler and the result bites you, they don't think it's a compiler bug.
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So I measured one change (the SLUB numa locality change) at a time and the data seems to be nice I think? (at least on my old Broadwell machine with 2 sockets)
The "Neither a win nor a loss" situation was because one change was a win and the other change was a loss.
But it's still synthetic hackbench and I wonder how it would perform on network benchmarks - but not sure if I could benchmark this enough on local env cuz I only have 2.5Gbps lan cards.
The "Neither a win nor a loss" situation was because one change was a win and the other change was a loss.
But it's still synthetic hackbench and I wonder how it would perform on network benchmarks - but not sure if I could benchmark this enough on local env cuz I only have 2.5Gbps lan cards.
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@ljs @dosnostalgic I did not exist at that time lol
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Harry (Hyeonggon) Yoo
hyeyoo
Edited 1 year ago
the moods on facebook/linkedin/fediverse are quite different. everyone seems to be normal on facebook/linkedin, but on fediverse.... hmm :)
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Harry (Hyeonggon) Yoo
hyeyoo
Edited 1 year ago
watching a tutorial on Oppenheimer before going to the cinema
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Harry (Hyeonggon) Yoo
hyeyoo
Edited 1 year ago
Making a small progress on one of my TODOs: run automatic builds & tests using CI tools for MM development kernels
This is a jenkins configuration matrix specially targeting SLUB to cover various SLUB configurations. Only boot test is done atm.
There are many milestones on this project, which demands more time :P
This is a jenkins configuration matrix specially targeting SLUB to cover various SLUB configurations. Only boot test is done atm.
There are many milestones on this project, which demands more time :P
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