Hacker News with Generative AI: Linux Kernel

IO_uring Network Zero-Copy Receive Lands in Linux 6.15 (phoronix.com)
IO_uring continues maturing while being one of the greatest innovations within the Linux kernel in the past number of years. With Linux 6.15, IO_uring is getting even more interesting with introducing network zero-copy receive support. With this new code a 200G link could be saturated off a single CPU core in a recent demonstration.

Linux Kernel, Networking, Performance, Zero-Copy

6 points by LinuxBender 3 days ago | 3 comments

Akamai Now Providing the Hosting Infrastructure for Kernel.org (phoronix.com)
It's not only FreeDesktop.org that has been transitioning to new infrastructure this month but separately, Kernel.org is now receiving hosting and CDN needs provided by Akamai.

Cloud Hosting, Linux Kernel, Open Source

12 points by speckx 6 days ago | 0 comments

Btrfs Adding Fast/Realtime ZSTD Compression and Other Performance Optimizations (phoronix.com)
David Sterba of SUSE sent in all of the Btrfs file-system updates today for the now-open Linux 6.15 kernel merge window.

Linux Kernel, File Systems, Performance Optimization, Btrfs

17 points by todsacerdoti 9 days ago | 2 comments

Cregit-Linux: how code gets into the kernel (linuxsources.org)
The following source code files from the linux kernel have been transformed using cregit and arranged in the same file system ordering that the kernel uses. Each file corresponds to a C source code file (extensions .c and .h).

Linux Kernel, Programming, Source Code, Open Source

7 points by follower 11 days ago | 4 comments

Linux 6.14 Sees Last Minute Fix for a Two Year Old Regression 30% Perf Drop (phoronix.com)
Submitted today ahead of the Linux 6.14 stable release expected Sunday is a lone scheduler fix for the kernel.

Linux Kernel, Performance, Bug Fixes

31 points by LinuxBender 12 days ago | 0 comments

Reviving the modprobe_path Technique: Overcoming search_binary_handler() Patch (theori.io)
This blog post introduces a new method for utilizing the Overwriting modprobe_path technique. Since this patch was merged last year, it is no longer possible to trigger modprobe_path in the Upstream kernel by executing dummy files.

Linux Kernel, Security, System Administration, Reverse Engineering

8 points by todsacerdoti 18 days ago | 3 comments

The case of the vanishing CPU: A Linux kernel debugging story (clickhouse.com)
A mysterious CPU spike in ClickHouse Cloud on GCP led to months of debugging, revealing a deeper issue within the Linux kernel’s memory management.

Linux Kernel, Debugging, Cloud Computing, Memory Management

47 points by manish_gill 27 days ago | 5 comments

When eBPF pt_regs reads return garbage on the latest Linux kernels, blame Fred (tanelpoder.com)
TLDR; Starting from Linux kernel version 6.9 on x86_64, there’s a new config option CONFIG_X86_FRED enabled and it adds 16 bytes to the bottom of a task’s kernel stack area, so you’ll need to account for this extra padding in your “raw” kernel stack & pt_regs lookup code.

Linux Kernel, Kernel Development, x86_64, eBPF, Security

105 points by tanelpoder 33 days ago | 11 comments

Marek has graciously offered to maintain the dma-mapping tree (kernel.org)
Marek has graciously offered to maintain the dma-mapping tree.

Linux Kernel, Open Source, Software Development

62 points by blenderob 36 days ago | 50 comments

Christoph Hellwig steps down from one of his kernel roles following Rust drama (phoronix.com)
Following the recent Rust drama within the Linux kernel that came out in part because Christoph Hellwig expressed objections to Rust bindings for the DMA mapping helpers that he is a maintainer of, Hellwig has now stepped down as one of the DMA mapping helper maintainers.

Linux Kernel, Programming Languages, Open Source, Controversy, Rust

61 points by dingi 36 days ago | 13 comments

A change in maintenance for the kernel's DMA-mapping layer (lwn.net)
The conversation around the merging of a set of Rust abstractions for the kernel's DMA-mapping layer has mostly settled after Linus Torvalds made it clear that the code would be accepted. One other consequence of this decision, though, is that Christoph Hellwig has quietly stepped down from the maintenance of the DMA-mapping code. Marek Szyprowski will be the maintainer of that layer going forward. Hellwig has maintained that code for many years; his contributions will be missed.

Linux Kernel, Software Development, Open Source

19 points by howtofly 36 days ago | 2 comments

Christoph Hellwig resigns as DMA maintainer (kernel.org)
Marek has graciously offered to maintain the dma-mapping tree.

Linux Kernel, Open Source, Software Development

40 points by Phelinofist 36 days ago | 3 comments

SystemV filesystem being removed from the Linux kernel (phoronix.com)
The SystemV file-system that implements Xenix FS, SystemV/386 FS, and Coherent FS is set to be removed from the Linux kernel.

Linux Kernel, Operating Systems, File Systems

10 points by todsacerdoti 40 days ago | 0 comments

Linus on Rust and the Kernel DMA Layer (lwn.net)
I was hopeful, and I've tried to just see if this long thread results in anything constructive, but this seems to be going backwards (or at least not forwards).

Linux Kernel, Programming Languages, Rust

91 points by tasn 41 days ago | 59 comments

Linus Torvalds Clarify Linux Maintainer Roles – Or Not – Around Rust Code (phoronix.com)
Linus Torvalds has largely refrained from the ongoing LKML discussions around a Rust policy for the Linux kernel and in-fighting between kernel developers and maintainers with differing views over Rust.

Linux Kernel, Rust, Open Source, Programming Languages, Software Development

13 points by unclet 41 days ago | 2 comments

Linus Torvalds: "If you don’t want to deal with Rust, you get no say on it" (kernel.org)
So let me be very clear: if you as a maintainer feel that you control who or what can use your code, YOU ARE WRONG.

Linux Kernel, Open Source, Programming Languages, Software Development, Community

87 points by etra0 41 days ago | 13 comments

Linus Torvalds Would Reportedly Merge Rust Kernel Code over Maintainer Objection (phoronix.com)
The drama surrounding Rust code within the Linux kernel continues... Christoph Hellwig is the maintainer of the DMA mapping helpers and several other areas of the kernel has been an outspoken critic of Rust code or secondary programming languages within the Linux kernel kernel. Hellwig has been critical of Rust code for the Linux kernel and its long-term maintainability.

Linux Kernel, Programming Languages, Rust, Controversy

4 points by ksec 43 days ago | 1 comments

Greg K-H: "Writing new code in Rust is a win for all of us" (kernel.org)
As someone who has seen almost EVERY kernel bugfix and security issue for the past 15+ years (well hopefully all of them end up in the stable trees, we do miss some at times when maintainers/developers forget to mark them as bugfixes), and who sees EVERY kernel CVE issued, I think I can speak on this topic.

Rust, Linux Kernel, Security, Programming Languages

679 points by mustache_kimono 43 days ago | 438 comments

Maintainer Opinions on Rust-for-Linux (lwn.net)
Miguel Ojeda gave a keynote at FOSDEM 2025 about the history of the Rust-for-Linux project, and the current attitude of people in the kernel community toward the experiment.

Rust, Linux Kernel, Open Source, Programming Languages, Operating Systems

3 points by flyaway123 46 days ago | 0 comments

Nouveau kernel maintainer steps down (freedesktop.org)
I was pondering with myself for a while if I should just make it official that I'm not really involved in the kernel community anymore, neither as a reviewer, nor as a maintainer.

Open Source, Linux Kernel, Community

44 points by tuananh 47 days ago | 23 comments

Linux kernel cgroups writeback high CPU troubleshooting (dasl.cc)
We’ve been upgrading the operating system from CentOS to Ubuntu on hosts across our fleet. Our CentOS hosts run an outdated Linux kernel version (3.10), whereas our Ubuntu hosts run a more modern kernel version (6.8). In August 2024, we began rolling out the Ubuntu upgrade across our Apache web servers. When we migrated larger portions of our fleet to Ubuntu, we began seeing elevated listen overflow errors.

Linux Kernel, Troubleshooting, Performance, Operating Systems, Server Management

178 points by mesto1 48 days ago | 27 comments

Exposing concurrency bugs with a custom scheduler (lwn.net)
Jake Hillion gave a presentation at FOSDEM about using sched_ext, the BPF scheduling framework that was introduced in kernel version 6.12, to help find elusive concurrency problems.

Concurrency, Linux Kernel, Debugging, BPF, Open Source

33 points by signa11 48 days ago | 5 comments

Rust kernel policy (rust-for-linux.com)
There has been a fair amount of confusion about what the kernel policies around Rust are, who maintains what and so on.

Rust, Linux Kernel, Programming, Open Source

98 points by LelouBil 52 days ago | 117 comments

New Apple Silicon Co-Maintainer Steps Up for the Linux Kernel (phoronix.com)
This week was the dramatic decision by Asahi Linux lead developer Hector Martin to step down as upstream kernel maintainer for the Apple Silicon (ARM) code following friction with other kernel developers over Rust affairs within the kernel.

Linux Kernel, Apple Silicon, ARM, Open Source, Software Development

46 points by LorenDB 53 days ago | 13 comments

Asahi Linux Lead Developer Hector Martin Steps Down (phoronix.com)
Following arguments on the Linux kernel mailing list the past few days over some Linux kernel maintainers being against the notion of Rust code in the mainline Linux kernel and trying to avoid it and very passionate views over the Linux kernel development process, Asahi Linux lead developer Hector Martin has removed himself from being an upstream maintainer of the ARM Apple code.

Linux Kernel, Open Source, Rust, Programming Languages, Software Development

15 points by doener 55 days ago | 1 comments

Hector Martin – [Patch] Maintainers: Remove Myself (lkml.org)
I no longer have any faith left in the kernel development process or community management approach.

Linux Kernel, Open Source, Community Management, Software Development

12 points by Reventlov 55 days ago | 52 comments

Mixing Rust and C in Linux likened to cancer by kernel maintainer (theregister.com)
Developers trying to add Rust code to the Linux kernel continue to face opposition from kernel maintainers who believe using multiple languages is an unwelcome and risky complication.

Rust, Linux Kernel, Programming Languages, Software Development, Open Source

13 points by jjgreen 56 days ago | 5 comments

List Any Linux Tracepoint with Their Arguments, Datatypes and Related Structs (tanelpoder.com)
This should be something useful for Linux kernel explorers and eBPF nerds!

Linux Kernel, eBPF, Programming, Debugging, System Programming

40 points by tanelpoder 61 days ago | 5 comments

KVM Enhancements Within the Linux 6.14 Kernel (phoronix.com)
Along with other Intel TDX changes and AMD SEV updates separately sent out for thei n-development Linux 6.14 kernel, there is the usual hearty batch of Kernel-based Virtual Machine (KVM) virtualization updates too.

Linux Kernel, Virtualization, KVM, Intel, AMD

7 points by LinuxBender 62 days ago | 6 comments

Linux 6.13 Released with AutoFDO and Propeller, AMD Changes and Apple Support (phoronix.com)
As anticipated the Linux 6.13 kernel was promoted to stable today with an on-time release and in turn also marking the start of the Linux 6.14 merge window.

Linux Kernel, Operating Systems, Software Releases, AMD, Apple

7 points by isaacfrond 73 days ago | 0 comments