Phoronix

With the upcoming Linux 6.6 cycle another exciting change was recently queued up within the block subsystem's "for-next" branch: IO_uring futex/futexv support...

While Linux 6.1 added the initial Rust infrastructure as an alternative programming language for writing new kernel modules, so far as of Linux 6.5 much of the upstreaming effort has been around adding new abstractions and supporting additional subsystems for making the Rust capabilities in the kernel more complete. The latest patch series is working on adding Rust abstractions for networking sockets and other fundamental networking bits...

In addition to all the interesting open-source graphics driver updates coming with Linux 6.6 like AMD FreeSync Panel Replay, Nouveau uAPI additions for NVK, Intel PSR for old laptops, and many other GPU driver changes, the Direct Rendering Manager (DRM) subsystem with its AI accelerator "accel" framework/subsystem is rolling out initial support for the VPU4 coming with Intel Lunar Lake processors...

Released last week was Eclipse OpenJ9 v0.40 as the latest feature update to this high performance JVM that focuses on being optimized for a small footprint...

Following last week's AMD Inception vulnerability another AMD Zen CPU bug came to light and that was performing a divide by zero on Zen 1 could end up leaking data with this DIV0 speculation bug. The original workaround was performing a dummy division 0/1 within the #DE exception handler but that's now turned out to be inadequate...

Linus Torvalds released the Linux 6.5-rc6 kernel a few hours early today after capping off a busy week...

The Bcachefs file-system continues to work its way toward the mainline kernel while interestingly this weekend a Valve developer posted patches for implementing case-folding (case insensitive) feature support for this open-source file-system...

The Mesa Radeon Vulkan "RADV" driver ray-tracing support is about to become much faster with a pending improvement that is currently undergoing review...

Last month the Mold 2.0 high-speed linker was released that shifted from AGPL to MIT licensing after their monetization strategy didn't pan out. This weekend the project is out with its Mold 2.1 release as another step forward for this alternative linker to GNU Gold and LLVM LLD...

Future LibreOffice releases will finally better handle animated PNG (APNG) files. After initial import support was added back in June, merged this week was initial export support for APNG files...

Intel engineer and open-source compiler expert H.J. Lu has landed a much faster log2() implementation within the GNU C Library (glibc) that makes use of FMA instructions with modern x86_64 CPUs...

AMD submitted more "new stuff" for their AMDGPU and AMDKFD kernel graphics and compute drivers for the upcoming Linux 6.6 kernel cycle...

Last month when the Linux kernel was mitigated for Zenbleed as a CPU vulnerability affecting AMD Zen 2 processors, it turns out the Steam Deck APU was accidentally left without coverage. An x86/urgent pull request sent out today for the Linux 6.5 kernel and for back-porting to current stable Linux kernel releases will extend the Zenbleed mitigation to protect Steam Deck gamers...

Last year the DisplayPort 2.1 specification was published and now Intel's open-source Linux engineers are working on adding support to the kernel for handling of the DisplayPort Alternate Mode 2.1 support for that DP operation over USB Type-C connections...

One of the new Linux kernel patch series out of AMD this week is for exposing ACPI PHAT, the Platform Health Assessment Table...

While KDE developers are busy working on Plasma 6, System76's software developers are busy working on their new Rust-based "COSMIC" desktop environment. System76 on Friday published a new blog post outlining their efforts in recent weeks...

KDE developers continue to be quite busy working on Plasma 6 development and related enhancements to this popular open-source desktop environment...

With the in-development NVK driver merged for Mesa 23.3 to provide open-source NVIDIA Vulkan API support when paired with the Nouveau kernel driver and the necessary Nouveau kernel driver improvements coming with Linux 6.6 for supporting this driver, Phoronix readers have been eager for some benchmarks... Well, here are some benchmarks on the NVIDIA GeForce RTX 20 and RTX 30 series when comparing the latest NVK+Nouveau code compared to the proprietary NVIDIA Linux graphics driver stack.

Following the new Linux stable kernels this week to quickly mitigate the Intel Downfall and AMD Inception vulnerabilities, today brings another set of stable point releases. Among the fixes to be picked up since Tuesday is the other AMD fix for the week of a Zen 1 bug that could leak data following a divide by zero operation...

The upcoming Linux 6.6 kernel will finish removing old remnants of Wireless USB support...

Developers of the BeOS-inspired Haiku operating system have long been carrying patches for supporting the GNU Compiler Collection (GCC) on their platform while this week the code was upstreamed for GCC 14...

Sent out today was the drm-intel-gt-next and drm-intel-next pull requests of the latest Intel graphics driver feature code for DRM-Next to then be merged for the upcoming Linux 6.6 cycle. Both pull requests indicate these are the last planned feature updates ahead of Linux 6.6 but what's interesting is that with the latest code upcoming Meteor Lake graphics are still being treated as experimental...

LLVM/Clang developers have been working on C23 language support for some time already but to this point it's only been exposed when using the -std=c2x target or -std=gnu2x for the GNU dialect. However, with C2x having been finalized this summer as C23, the LLVM Clang 18 compiler will now honor the -std=c23 option...

Cloud Hypervisor -- the Rust-written open-source VMM that was started by Intel while having evolved into a Linux Foundation project with backing from multiple organizations -- is out with the Cloud-Hypervisor 34 release...

It shouldn't come as much surprise for those familiar with Fedora given its tendency to always ship with the very latest open-source compiler toolchain components, but this autumn's release of Fedora 39 will once again have all the leading-edge GNU compiler pieces...

Intel Arc Graphics customers have been eager to see the new Xe DRM kernel driver merged as a modern alternative to the long-standing i915 Direct Rendering Manager driver. The Xe driver should allow for better performance, is focused just on recent Intel graphics hardware, makes use of modern kernel features, and will allow for new features such as around the Vulkan sparse support. One of the blockers for getting the Xe driver merged at least in experimental form is getting the necessary DRM scheduler changes merged...

Ubuntu 22.04.3 LTS is now available as the newest point release to this current long-term support series...

Microsoft has released CBL-Mariner 2.0.20230805 as the newest monthly-ish update to their in-house Linux distribution used for purposes from Azure to WSL...

As part of Intel's ongoing AI push, the company announced today they have joined the PyTorch Foundation as a premier member...

OpenELA has been announced as the Open Enterprise Linux Association that brings together CIQ (Rocky Linux), Oracle, and SUSE for collaborating around RHEL-compatible Linux distributions...

After resorting to buying a NVIDIA GeForce RTX 4060 graphics card to be able to share Linux performance metrics for that more affordable Ada GPU, last month I posted the Radeon RX 7600 vs. GeForce RTX 4060 benchmarks as well as looking at the GeForce GTX 1060 through RTX 4060 GPU compute and renderer performance across several generations of NVIDIA GPUs. For those considering the RTX 4060 for a Linux gaming system or an upgrade to other recently released AMD or NVIDIA GPUs, here is a fresh round of Linux gaming performance metrics on the newest drivers.

AMD Linux engineers continue work on enabling the Family 1Ah CPU models for the Linux kernel as what would appear to almost surely be the next-gen Zen 5 processors...

A decade ago the Radeon R600g SB shader back-end proved useful for boosting gaming performance on pre-GCN graphics cards of the time and proved useful. But in more recent years in the R600g switch to NIR, the SB path hasn't received much attention and its benefits have diminished. The R600g SB code has now been dropped...

The Nouveau DRM kernel driver changes for new user-space APIs to be used by the Mesa NVK open-source Vulkan driver have now been submitted for pulling to DRM-Next from the current drm-misc-next queue. These Nouveau kernel driver additions for NVK in turn will then premiere with the upcoming Linux 6.6 cycle...

Merged for Mesa 23.3 is support for the VirGL code to handle accelerated AV1 video decoding within guest virtual machines...

GRUB2 and Linux bootloaders in general don't get too much attention these days as for the most part they "just work" well and most Linux distributions prefer to keep their GRUB menu hidden if at all possible. But at the same time it's an often overlooked area and not an area where there is an eager and glamorous open-source community behind it. However, it looks like Red Hat at least may have some new ideas brewing and they are hiring now to improve the Linux bootloader experience...

The consulting firm KDAB that is known for their work on the Qt toolkit has released KDGpu as a new library that is a thin wrapper around the Vulkan API and aims to allow for more productive GPU programming...

In addition to Intel posting initial AVX10.1 patches for the GCC compiler, Intel has also begun sorting out their AVX10 plans for the LLVM/Clang compiler stack...

With yesterday's disclosure of the Intel Downfall speculative execution vulnerability and the updated CPU microcode and Linux kernel patches I have been very busy testing the performance impact of this mitigation. Here are some initial numbers and workloads I have found to be impacted as a result of this security mitigation for Skylake to Icelake/Tigerlake client and server processors.

After a rather busy Patch Tuesday with the AMD Inception vulnerability and Intel Downfall going public, the Linux kernel saw a new bug fix merged today for a different issue... It turns out original AMD Zen 1 processors could end up leaking data in certain conditions after a divide by zero occurs...

Following yesterday's disclosure of the AMD "Inception" security vulnerability and the Linux kernel patches merged for reporting the mitigation status as well as the kernel-based handling for earlier generation Zen CPUs, the Family 19h microcode mitigations have now been picked up by the linux-firmware.git repository...

A new set of patches have been posted for the Linux kernel that implement AMD P-State Preferred Core handling for the amd-pstate driver...

As a lot of active development continues around the KDE Plasma 6 desktop and the developers eyeing a beta in a few months, it appears work on this Qt6-ported desktop environment is coming together quite nicely...

The long-in-development Bcachefs file-system driver was submitted for Linux 6.5 but never merged this cycle due to various technical issues and developer in-fighting. Linus Torvalds himself has now gotten around to reviewing the proposed code and chiming in on the situation...

The intel-speed-select tool that lives within the Linux kernel source tree has seen a set of patches prepared for the upcoming Linux 6.6 merge window. Arguably most interesting with this updated Intel Speed Select tool is now the ability to work with more than eight CPU sockets per platform -- the new limit is 32...

As soon as the AMD Inception CPU vulnerability was made public yesterday, the Linux kernel mitigation patches were merged and within hours appeared in six new stable point releases for the kernel along with the Intel Downfall mitigation patches. Today though these patches are seeing a rework to clean-up this mitigation...

As a result of the AMD INCEPTION and Intel DOWNFALL speculative execution vulnerabilities published this Patch Tuesday, Linux 6.5 Git quickly picked up the patches on embargo expiration and now there are six new stable point releases for back-porting these CPU security vulnerabilites to the supported stable kernel series...

NVIDIA today rolled out a new stable point release in their R535 series for Linux users to provide a handful of bug fixes...

In addition to the Linux kernel patches for GDS/Downfall for reporting the mitigated state and handling around Intel's latest speculative execution vulnerability, the updated CPU microcode has now been published on GitHub. In addition to having the Downfall mitigations for Skylake through Icelake/Tigerlake, there are also other security updates and functional issues resolved by this Intel 20230808 CPU microcode release...

This Patch Tuesday brings a new and potentially painful processor speculative execution vulnerability... Downfall, or as Intel prefers to call it is GDS: Gather Data Sampling. GDS/Downfall affects the gather instruction with AVX2 and AVX-512 enabled processors. At least the latest-generation Intel CPUs are not affected but Tigerlake / Ice Lake back to Skylake is confirmed to be impacted. There is microcode mitigation available but it will be costly for AVX2/AVX-512 workloads with GATHER instructions in hot code-paths and thus widespread software exposure particularly for HPC and other compute-intensive workloads that have relied on AVX2/AVX-512 for better performance.