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Linux Gaining SMP Support For The OpenPOWER Microwatt

Open-sourced back in 2019 was the OpenPOWER Microwatt as an open-source, soft processor core of Power ISA 3.0 and intended for use on FPGA boards and then there was seemingly short-lived work to fabricate a Microwatt chip and Microwatt also found its way for use within a BMC implementation. Linux 5.14 added support for this soft CPU core while the upcoming Linux 6.15 cycle is set to introduce SMP support for Microwatt...

Linux's New Way Of Informing User-Space Over Hung GPUs May Become More Useful

Last month I wrote about new code slated to be added for Linux 6.15 that would provide a cross-driver/standardized means of reporting to user-space over hung GPUs. For the likes of the AMD and Intel graphics drivers initially, user-space will be notified via this new wedged event when a GPU is hung in case user-space wants to take additional actions to try to recover the GPU or at least properly note the troubled state of the GPU. There are now proposed patches under review for further extending this functionality...

Intel Core 2 CPUs Have Been Affected By An Annoying Linux Kernel Bug For 5+ Years

A fix was merged to the Linux 6.14 kernel on Friday -- and also for back-porting to existing Linux stable kernels over the coming days -- for fixing an annoying problem with Intel Core 2 processors. The problem, which was introduced to the Linux kernel back in 2019, could lead to system stalls and boot delays for those still using Intel Core 2 CPUs with modern distributions...

FreeDesktop.org Devises New Hosting Plan For GitLab Infrastructure

One month ago FreeDesktop.org/X.Org experienced a new cloud crisis with Equinix Metal shutting down and losing access to all the FreeDesktop.org cloud/hosting resources at the end of April. FreeDesktop.org GitLab powers not only the X.Org projects but also Mesa, Wayland, and countless other Linux desktop open-source projects. Fortunately, it looks like they will have a new solution in time...

There Will Not Be Official ROCm Support For The Radeon RX 9070 Series On Launch Day

AMD has been investing a lot into the ROCm compute stack to make it a more formidable contender against the NVIDIA CUDA software ecosystem. From better documentation and improved application/API coverage to expanding their range of supported AMD GPUs, there's been a lot going on. So with this morning's much anticipated Radeon RX 9070 series launch announcement ahead of product availability next week, you are probably wondering about Radeon RX 9000 series support for ROCm too... Here's what I know so far...

AMDVLK 2025.Q1.2 Released With Strix Halo Support

When seeing a new AMDVLK release was just tagged on GitHub and just a few hours to go until the Radeon RX 9070 series announcement, I was hoping it was going to be a new driver officially rolling out their new RDNA4 GPU support. Today's AMDVLK 2025.Q1.2 driver was not for officially introducing RDNA4 but does bring Strix Halo support and other improvements...

Intel Posts Linux Kernel Patches For Supporting APX - Advanced Performance Extensions

Intel initially detailed Advanced Performance Extensions (APX) back in mid-2023 as extensions to double the number of general purpose registers and add other performance features. In the time since they have done a lot preparing the GCC and LLVM/Clang compilers for the new APX ISA features while finally today they sent out an initial set of patches for preparing the Linux kernel for APX processors...

NVIDIA 570.124.04 Linux Driver Brings Additional Fixes

Going into beta just under one month ago was the NVIDIA 570.86.16 Linux driver that brought initial support for GeForce RTX 50 "Blackwell" graphics cards as well as Vulkan driver improvements, Variable Rate Refresh (VRR) support with multiple displays, GPU overclocking exposed by default, and various other refinements to this official NVIDIA Linux driver. Out today is the NVIDIA 570.124.04 stable Linux driver release...

x86 32-bit Changes Look To Be Ready For Linux 6.15 - Drops Support For More Than 4GB RAM

Over the past few months there's been an in-progress patch series by Arnd Bergmann for cleaning up the x86 32-bit kernel support for running on x86_64 CPUs. After the third iteration of the patches were posted this week, these x86 32-bit CPU clean-ups were shuffled into the tip/tip.git "x86/cpu" Git branch ahead of the upcoming Linux 6.15 merge window...

AMD EPYC Turin Power Profile Selection Impact On Performance & Efficiency

Last week I published an article looking at the power efficiency of 5th Gen AMD EPYC "Turin" using the modern AMD P-State driver and the Power Profile options. The AMD P-State driver being used by default now for the EPYC 9005 series processors on Linux 6.12+ and paired with Power Profile option tuning can deliver a nice boost to server energy efficiency with only modest impact to the performance. Today's article are some complementary numbers I carried out recently on a Supermicro server looking at more of the Power Profile Selection options.
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