Linux Plumbers Conference 2025

Session

Kernel Summit Track

11 Dec 2025, 10:00

Conveners

Kernel Summit Track

• Theodore Ts'o (Google)

197. Re-think of richACLs in AI/LLM era

Coly Li (fnnas.com)

This is Coly Li. I’ve been maintaining bcache for a while and have met Linus,
Greg, Ted, and other maintainers in person at many conferences. Yes, I am a
sustained and reliable kernel developer.

Recently, I joined a startup (https://fnnas.com) that provides AI/LLM
capabilities for personal or micro-enterprise storage. We help users share and
communicate AI/LLM-processed information from...

138. Revocable: a mechanism for preventing "classic" use-after-free bugs

Tzung-Bi Shih

A "classic" Use-After-Free (UAF) can occur when resources tied to hot-pluggable devices are accessed after the device has been removed. For example, an open file descriptor may hold references to such resources; if the device is unplugged, subsequent file operations on that descriptor can trigger an UAF. This talk, a follow-up to a previous presentation[1], explores an approach to this...

267. Moving kernel swapping infrastructure to Rust

Mr Vitaly Wool

Despite all controversies, Rust in recent times has gained popularity as the second Linux kernel high-level language. The author once decided to go with the flow. What had started as an attempt to overcome zsmalloc inefficiency for large (16K+) pages became a broader initiative to rewrite parts of the swapping infrastructure in Rust, gaining better safety and reducing the code footprint in one...

167. drm and cgroup memory management - two great tastes

David Airlie

Traditionally the drm subsystem has managed memory for GPU devices it it's own space. Device having large amounts of VRAM and mostly being client focused, meant there wasn't a large amount of attention paid to integrating with cgroup memory management.

However this is changing with more GPUs in servers/HPC scenarios and more shared memory devices without device RAM becoming...

230. Highmem deprecation planning

Arnd Bergmann (Linaro)

Following up on an ELC presentation about the future of 32-bit Linux, this is a discussion session specifically about highmem, which is a feature needed for a small number of 32-bit machines that regularly gets kernel developers upset.

The goal of this session is to find consensus on whether we can resonably drop support for highmem in the next few years, what the best time for that would...

231. TAB Q&A

Dan Williams (Intel), Dave Hansen, Greg Kroah-Hartman, Jonathan Corbet (Linux Plumbers Conference), Kees Cook (Google), Miguel Ojeda, Sasha Levin, Shuah Khan (The Linux Foundation), Steven Rostedt, Theodore Ts'o (Google)

The Linux Foundation Technical Advisory Board (TAB) represents Linux Kernel project interests to the Linux Foundation. It also uses the pooled influence of its elected members to support the long term health of the project.

This open forum / panel discussion is an opportunity to learn about and discuss TAB initiatives and ongoing project needs.

127. Kernel documentation: update and future directions

Jonathan Corbet (Linux Plumbers Conference)

The last year has seen a massive amount of work in
our documentation build infrastructure and continuous
improvement in the docs themselves. This session will provide a brief update of what has happened recently, followed by discussion on what we want to do next. How would we like our documentation to evolve in the next year or three?

193. News from PREEMPT_RT

Sebastian Siewior

PREEMPT_RT was merged but the tree is still around. To further improve PREEMPT_RT in certain scenarios, the local bottom halves were introduced allowing to remove locking elsewhere. Another improvement went into to the futex code to allow process private hash. This change allowed another change to improve the hash handling across NUMA nodes.
This talk presents the changes, why they were...