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Linux kernel hacker and maintainer etc.

OpenPGP: 3AB05486C7752FE1
jarkko

Jarkko Sakkinen

Edited 1 year ago
I think in theory it could be possible to make static eBPF, i.e. take the source tree compile eBPF as inline modifications. I.e. mimic "printk debugging" with eBPF.

When kernel testing e.g. with BuildRoot this would be more lean than actual eBPF.

"git workspace" gives a reference model for clone snapshotting.

Usually when fixing kernel bug or doing some improvement to kernel, adding a few temp printk's is still imho the king because kernel compiles in no time. Dynamic tracing tools do not support this workflow very well. They support well debugging exactly live systems, which is totally different use case.

#linux #kernel #ebpf
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jarkko

Jarkko Sakkinen

Compiling > 2100 sub-crate dependency Rust project with hot sccache (< 5 misses), I noticed that my X1 ThinkPad finishes about 30 minutes and Mac M2 Pro in 10 minutes.

It gives a rough ballpark factor for single core performance against i7-1260P
given that compilation (which distributes best) takes quite insignificant portion of the time, and most is spent in linking...
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jarkko

Jarkko Sakkinen

Reply to @jarkko
enforced to use matrix at work so really have had to do research on this because overall the quality is not great :-)
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jarkko

Jarkko Sakkinen

Edited 1 year ago
This is the only all rounds good Matrix client I'm aware of: https://iamb.chat/index.html It is terminal but is both multi-account and a separate thread view (and all E2EE crap).

From graphical ones GNOME projects Fractal is otherwise great except the lack of thread view.

#matrix
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jarkko

Jarkko Sakkinen

lol
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jarkko

Jarkko Sakkinen

Reply to @vbabka
@vbabka @sima good to be aware of this +1
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jarkko

Jarkko Sakkinen

Reply to @jarkko
@kernellogger I did "sudo dnf copr enable @kernel-vanilla/mainline-wo-mergew && dnf up". For me in my work laptop it makes to follow rc's anyway :-)
Also will install kernel-rt.
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jarkko

Jarkko Sakkinen

Reply to @kernellogger@fosstodon.org
@kernellogger awesome! thanks!
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jarkko

Jarkko Sakkinen

Is there a kernel with CONFIG_PREEMPT on for Fedora? Like similar to https://liquorix.net/

#fedora #linux
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jarkko

Jarkko Sakkinen

Reply to @jarkko
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jarkko

Jarkko Sakkinen

Reply to @jarkko
OK there's an update (just did dnf update) with e.g. "iwlwifi-*-firmware" packages and bunch of others so fingers crossed!
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jarkko
repeated
catsalad@infosec.exchange

CatSaladđŸˆđŸ„— (D.Burch) blobcatrainbow

What do you mean the chair is haunted?

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jarkko

Jarkko Sakkinen

After a Fedora kernel update WiFi works differently :-)

I have not dared to try out suspend (it's completely disabled) but now WiFi connection seldomly and randomly plain dies and I need to reconnect.

#fedora #linux
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jarkko
repeated
sirber@fosstodon.org

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jarkko

Jarkko Sakkinen

Reply to @mairacanal@fosstodon.org
@mairacanal yeah, i agree! I like it because it is the only theme where both light and dark versions work for me :-) while hacking i like to use dark and while in meetings and in presentation slides the light version is great
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jarkko

Jarkko Sakkinen

Reply to @pid_eins@mastodon.social
@pid_eins s/Models/Modules/ ;-)

Sorry could not help myself, otherwise cool stuff...
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jarkko

Jarkko Sakkinen

I think I wait buying a new computer up until 3950X3D is out and then make a pre-order. I want a mATX form factor machine. I sold my PC when I started at Parity Technologies so for now have to survive with a shitty Thinkpad ;-)

The only other part I know for sure is https://www.fractal-design.com/products/cases/meshify/meshify-2-mini/black-tg-dark-tint/

This is because I only ever buy Fractal Design cases :-)

Can't wait for the smell of a fresh computer...
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jarkko

Jarkko Sakkinen

Reply to @oleksandr@natalenko.name
@oleksandr more i've used 6.11 in fedora more i feel like that kernel release was a mistake ;-) random crashes, wifi not working etc. no time to write bug reports all the time...
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jarkko
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monsieuricon

K. Ryabitsev 🍁

x.x.x.x - - [10/Nov/2024:00:02:37 +0000] "GET / HTTP/1.1" 301 162 "-" "okhttp/4.9.0"

You know what’s interesting about this log line? It repeats 56,686,963 times in www.kernel.org logs for yesterday, across 4 nodes. That’s about 700 times a second, and this has been going on for months.

These requests aren’t intentionally malicious – they issue a simple GET /, receive their 301 redirect, and terminate the connection. From what I can tell, this is some kind of appliance or software installed on mobile clients that uses “can I reach www.kernel.org” as a network test.

This wouldn’t be that big of a deal – a single plaintext “GET /“ that triggers an immediate 301 is very cheap for us to generate, but the number of these requests has been steadily growing.

If you have any idea what this is and how to make it stop, please reach out?

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jarkko

Jarkko Sakkinen

Reply to @jarkko
@mairacanal After knowingly realizing the different order of vim and helix I don't find too complicated to use both either. Vim is "do-select" and helix is "select-do" :-) That's the main philosophical difference.
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