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FOSS
Kernel, distros, and the wider free and open source software world.
437 stories archived
[$] BPF support in GCC 16 and beyond
Josรฉ Marchesi and the GCC-BPF developers opened the BPF track at the 2026 Linux Storage, Filesystem, Memory-management, and BPF Summit with a 90-minute summary of what has changed for GCC's BPF support in the past year. This kind of session has become something of a tradition. There were similar updates in 2025 and 2024. This time around, GCC seems to be closing in on feature parity with the LLVM toolchain โ as the slides detail.
[$] Toward better handling of major page faults
A major page fault occurs when a process attempts to access a page that is not currently present in RAM; satisfying such faults usually involves I/O, and can thus take some time. When many threads sharing an address space are generating page faults, the result can be significant lock contention while that I/O takes place. During the memory-management track at the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit, Barry Song led a session to try, yet again, to find an enduring solution to this problem.
Security updates for Friday
Security updates have been issued by AlmaLinux (firefox), Debian (chromium, nss, openvpn, and thunderbird), Fedora (cockpit, kernel, and linux-firmware), Oracle (gdk-pixbuf2, kernel, and libsndfile), SUSE (container-suseconnect, cpp-httplib, dnsmasq, firefox, glibc, GraphicsMagick, java-1_8_0-openj9, kernel, mozjs115, php8, python-urllib3, rekor, rootlesskit, rsync, tiff, ucode-intel, util-linux, and xz), and Ubuntu (bind9, bubblewrap, libarchive, linux-intel-iot-realtime, postgresql-14, postgresql-16, postgresql-17, postgresql-18, and xdg-desktop-portal).
Vulnerabilities in various GTK-based PDF readers
Michael Catanzaro has disclosed a command-injection vulnerability affecting a number of GTK-based PDF readers; exploits included: They contain a script for building malicious polyglot PDFs that are simultaneously both valid PDF files and also valid ELF binaries. When the user opens the PDF in the PDF viewer and clicks on a malicious link embedded in the PDF, the PDF abuses the command injection vulnerability to load itself as a GTK module using the `--gtk-module` command line flag. It can then execute arbitrary code via its library constructor. That flag was removed in GTK 4, which is why the vulnerability is much less serious for Papers than it is for Evince, Atril, and Xreader.
[$] Custom page-cache policies with BPF
The kernel's page cache is charged with maintaining pages (or, more correctly, folios) containing copies of data from files in the filesystem; its performance has a big effect on the performance of the system as a whole. One of the key decisions the kernel must make is when to evict folios from the page cache. At the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit, Tal Zussman ran a memory-management-track session on how the page cache could be better customized for specific workloads. It will not be much of a spoiler to say that it involves BPF.
[$] Dirk and Linus discuss AI and kernel development
Linus Torvalds does not enjoy giving talks, but he does consent to the occasional on-stage conversation with Dirk Hohndel at Linux Foundation events. The pair held the 30th of their fire-less fireside chats during a keynote session on Mayย 20, at the 2026 Open Source Summit North America. Topics included 3D printing, guitar pedals, the recent 7.1-rc4 release of the kernel, and Torvalds's complicated relationship with AI tooling.
Kernel prepatch 7.1-rc5
The 7.1-rc5 kernel prepatch is out for testing. Quoth Linus: I'm not entirely happy about it - most of this is totally trivial stuff to random drivers, which obviously makes it all less scary, but at the same time I'm really not convinced the churn is worth it at rc5 time. These things are "fixes", sure, but at the same time a lot of them are simply so irrelevant that I think they'd be better off in a linux-next tree and get merged during the merge window. So I think I'll start being a bit more hardnosed about this kind of unnecessary churn this late in the game. We are supposed to look for *regressions*. Non-critical fixes to long-standing issues are simply not appropriate for this late in the release cycle. End result: this is too big, and this is the heads-up that I'll be pushing back on pointless pull requests with fixes that just aren't that important. And yes, several of these series were triggered by AI code review.
A large set of stable kernel updates
The 7.0.10, 6.18.33, 6.12.91, 6.6.141, 6.1.174, 5.15.208, and 5.10.257 stable kernel updates have all been released. The first four are huge (the 7.0.10 review version had 1,146 commits) while 6.1.174, 5.15.208, and 5.10.257 are small updates for the "Fragnesia" vulnerability.
Expanded Reset Support Coming For AMDGPU To Recover From More GPU Compute Hangs
A set of 42 patches were posted on Thursday for the AMDGPU kernel driver and associated AMDKFD compute driver code for enabling pipe reset capabilities for compute workloads...
Linux Sound Subsystem Also Seeing Many Fixes Driven By AI/LLMs
It's not only the Linux networking subsystem where many fixes have been appearing -- including several notable security fixes for local privilege escalation issues -- leading to "craziness" from AI / LLMs. The Linux sound subsystem has also been seeing an uptick in activity with many "assisted-by" patches coming about in recent weeks...
Today's Linux Networking Fixes: "Craziness Continues With No End In Sight"
Driven by AI/LLM bots like Shashiko uncovering new issues within the Linux kernel source tree, including various security vulnerabilities like Dirty Frag, the mailing list has been wild with bug reports and fixes. Today's networking fixes pull request for Linux 7.1 continues to highlight the ongoing craziness and fears that the worst may be yet to come...
NVIDIA RTX PRO Blackwell Performance Delivering Excellent Linux Performance
Recently I received the line-up of the NVIDIA RTX PRO "Blackwell" workstation graphics cards for seeing how these newest professional offerings from NVIDIA are performing on Linux and competing against the AMD Radeon AI PRO and Intel Arc Pro B-Series competition.
[$] Tier-aware memory-controller limits
Joshua Hahn began his session in the memory-management track of the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit by saying that the memory controller for control groups is intended to provide resource allocation, accounting, and protection from interference by other tasks. But it was not really designed for tiered-memory systems; he is looking for a way to improve that situation.
Security updates for Monday
Security updates have been issued by Debian (atril, evince, gnutls28, haproxy, haveged, jq, kernel, krb5, libgcrypt20, nodejs, and thunderbird), Fedora (aw-server-rust, awatcher, bind, bind-dyndb-ldap, chromium, composer, docker-buildkit, docker-buildx, dotnet10.0, dotnet8.0, dotnet9.0, evince, firefox, httpd, kernel, nodejs-aw-webui, nss, perl-Apache-Session-Browseable, pie, python-pulp-glue, python-requests, and python3.15), Slackware (kernel), SUSE (apptainer, chromium, cockpit, dnsmasq, google-guest-agent, hauler, iproute2, jfrog-cli, kernel, libecpg6, libsolv, libzypp, zypper, mcphost, oci-cli, perl-YAML-Syck, python-lxml, python-urllib3, python311-impacket, rqlite, rsync, util-linux, and xz), and Ubuntu (evince, linux-azure, linux-azure-5.4, linux-azure-fips, linux-azure-4.15, linux-azure-fips, linux-fips, linux-gcp-5.15, linux-lowlatency-hwe-5.15, linux-oracle-6.17, node-path-to-regexp, and rclone).
Linux Provides Better Performance With The AMD Ryzen 9 9950X3D2 Over Windows 11
Last month with the new AMD Zen 5 "Dual Edition" 3D V-Cache CPU, the AMD Ryzen 9 9950X3D2 Dual Edition showed great performance on Linux across a range of workloads. Curious if the operating system was playing into the greater benefit of Ryzen 9 9950X3D2 versus just the workloads tested, this article is looking at both the AMD Ryzen 9 9950X3D and Ryzen 9 9950X3D2 on Microsoft Windows 11 and Ubuntu 26.04 LTS Linux across a range of native benchmarks.
HP Panther Lake Systems Now Have Intel ISH Firmware For Linux
For those with a new Core Ultra Series 3 "Panther Lake" laptop from HP or considering one of these new systems, the Intel ISH firmware has now been upstreamed to linux-firmware.git for enhancing the out-of-the-box support...
AMD PMC Linux Driver Preps For Zen 6 CPUs
The AMD SoC Power Management Controller Driver is the latest seeing patch activity now in preparing for next-gen Zen 6 processors...
Proposed Multi-Thread Parallel Compilation "MTPC" For LLVM Is Great News
A new proposal volleyed today among LLVM developers is for Multi-Thread Parallel Compilation "MTPC" for the ThinLTO link-time optimization code. This is great news for today's high core count CPUs when looking to compile very large LLVM modules...
GNOME Commander 2.0 Released Following Rewrite In Rust & GTK4
GNOME Commander, the orthodox file manager for the GNOME desktop that was inspired by Norton Commander, has been rewritten in the Rust programming language and also now using the GTK4 toolkit...
[$] Reviewing kernel patches with LLMs
In a plenary session at the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit, the state of patch review using large language models (LLMs) was discussed. It is a topic that has been swirling around in the kernel community for much of the year. The plenary, which was led by Roman Gushchin, Chris Mason, Josef Bacik, and Sasha Levin, resulted in a quite bit of discussion, so much that a second filesystem-track-only (though others surely sat in) slot was used to continue it later in the day.
Linux 7.1 Merges AMD Dynamic EPP Fixes, Intel Bartlett Lake Scaling Fix
Merged today for Linux 7.1 was this week's power management fixes with a few notable fixes for both AMD and Intel platforms...
OpenCL 3.1.1 Released To Address A Possible Performance Regression
Released earlier this month was the OpenCL 3.1 specification with a focus on enhancing AI and HPC workloads for this long-time Khronos specification. Out today is OpenCL 3.1.1 as a point release with an emphasis on addressing a possible performance regression of OpenCL 3.1...
Comprehensive Response to Bambu's AGPLv3 Violations (Software Freedom Conservancy)
The Software Freedom Conservancy (SFC) published a news item on May 18 about its response to violations of the AGPLv3 by Bambu Lab in its 3D printers. The company has not provided the source code to its modifications to a 3D "slicer" program that was released under the AGPLv3 and it has also threatened Paweล Jarczak who created a fork of a different slicer (Orca Slicer) released under AGPLv3 in order to interoperate with his Bambu printer. Based on that, the SFC has created the baltobu project aimed at reverse-engineering and reimplementing the Bambu code while also hosting the Orca Slicer fork. Bambu has behaved badly for years and made multiple, provably false public statements regarding the AGPLv3 and its requirements. The recent aggressive behavior toward Paweล Jarczak was a last straw for us: we have decided to launch a multi-pronged effort that will assist consumers and users in the short-term, and also work toward a long-term strategy to improve the software right to repair for all 3D printer consumers.
systemd 261-rc1 Released With OS Installer, IMDS Subsystem & New storagectl
The first release candidate of systemd 261 is out today and it includes yet more features for this Linux init system and service manager...