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Home > Linux > Linux kernel 6.0 is released. What’s new?

Linux kernel 6.0 is released. What’s new?

Linus Torvalds, developer of Linux kernel has announced the final release of Linux kernel 6.0, bringing many enhancements and improvements.


Rusen Gobel Rusen Gobel
October 3, 2022
5 min read
Whats new in Linux kernel 6.0
  • After approximately two months of development, Linus Torvalds announced the release of Linux kernel 6.0.
  • Linux kernel 6.0 comes with a variety of improvements; most notably in CPU, virtualization, and file systems.
  • Linux kernel 6.0 is now available for download. However, it will take additional time for distributions to update their kernel versions to 6.0.

The release cycle of the Linux kernel continues as 5.19 was released almost three months ago, and the developers have now finished working on the next step: 6.0. Linux kernel 6.0 is now available after getting its last release candidate last week. As usual, Linus Torvalds made the announcement of the new kernel release.

Table of Contents

  • Why is it named Linux kernel 6.0?
  • CPU-related changes
  • Additional changes for CPUs
  • Virtualization improvements
  • GPU driver support
  • File system changes
  • Other changes
  • Download Linux kernel 6.0
  • FAQ

Why is it named Linux kernel 6.0?

After the release of version 5.19 of the Linux kernel, people were expecting 5.20 as the next version. However, Linus Torvalds, developer of the Linux kernel decided to go on with 6.0 as the version number. But this decision was only based on the numbers; the “20” in 5.20 was a too big number, so Linus changed the “5” and it became 6.0. Nothing revolutionary comes with Linux kernel 6.0; it is a usual kernel release.

CPU-related changes

Linux kernel 6.0 delivers some additional fixes for Retbleed vulnerability. AMD Zen 1, Zen 1+, and Zen 2+ CPUs are not fully secured with the IBPB mode; so STIBP is now also available for those CPUs to fully secure the systems. Going on with AMD-related changes, the company drops audio drivers, for a platform codenamed “Pink Sardine”. This is a completely new codename; the company also used other fish names for its Ryzen 5000 and Ryzen 6000 series APUs. Pink Sardine platform is based on the “acp6.2” design; there is no further information about it yet.

Additionally, Linux kernel 6.0 adds Sensor Fusion Hub 1.1 support, which improves the capabilities of the sensors of Ryzen-based laptops. Finally, the XP-PEN Deco L drawing tablet is also supported with the new kernel release. Looking at the Intel side, the Linux kernel now adds new hardware support to TCC Cooling Driver: Alder Lake-N and Raptor Lake-P systems.

Additional changes for CPUs

There are some improvements in the process scheduler as well. NUMA balancing for Zen-based AMD systems improved and CPUs will be more efficient while searching for idle CPU cores while they are under heavy load. The patch in the Linux kernel 6.0 scheduler also includes some other balancing features, optimizations, and fixes. 

The ACPI (Advanced Configuration and Power Interface) has received some additional improvements such as support for Zhaoxin and Centaur processors on CPUFreq drivers’ boost control UI and fix for the problems with Xeon Sapphire Rapids’ C1 and C1E states. The Chinese CPU architecture, loongArch, now supports PCI and comes with stack unwinder, and stack trace supports in addition to some other changes and bug fixes. Additionally, the kernel takes some initial steps for Compute Express Link (CXL) support; the initial infrastructure for CXL region provisioning lands to the Linux kernel 6.0.

Virtualization improvements

VirtIO, the input/output virtualization framework for Linux has received some tweaks, fixes, and new features for vq resize support with the new vq reset feature. Additionally, KVM receives some polishments with Intel IPI virtualization and AMD x2AVIC supports, which raises the KVM limit to 511 from 255. IPI virtualization can lower the overhead with IPI-sensitive processes and it will be available for Sapphire Rapids series Intel processors. Existing Xeon Ice Lake processors also receive PEBS virtualization support.

RISC-V processor architecture code is receiving some improvements as well. The Svpbmt extension, which delivers the Page-Based Memory Types support is enhanced. The defconfig has received tweaks to run Dockers and Ubuntu Snaps without any problem with the default configuration. There are three new extensions for RISC-V as well: Zicbom, Zihintpause, and Sstc. It received a system instruction emulation framework, CSR emulation framework, and Svpbmt extension support inside guests too. Finally, Linux kernel 6.0 also received a new feature named “guest vCPU stall detector” which periodically checks the guests if they are stalled.

GPU driver support

DRM subsystem has received new Intel Alchemist, AMD RDNA3, and AMD Instinct MI300 open-source GPU drivers. AMDKFD compute driver has now P2P DMA with DMA-BUF support, ioctl call support for available VRAM, and HMM profiler support as well. Open-source Nvidia Nouveau driver for Linux kernel 6.0 receives GA103 GPU support, which powers the RTX 3060 Ti graphics cards.

File system changes

The file systems that are available for Linux have also received some tweaks and NTFS3 is currently under a refactoring process and is getting some bug fixes. Btrfs, on the other hand, has now Send Stream v2 support that delivers support for reading and writing of compressed data. RAID5 and RAID6 have got some bug fixes and sysfs can display commit stats alongside other minor tweaks and fixes. With some changes, it also triples the performance of asynchronous I/O read operations.

F2FS (Flash Friendly File-System) receives a low-memory mode that can shrink the conserved memory to provide some additional space with some performance cost as well as some improvements for atomic write operations. The NFSD file system also comes with NFSv4 – Courteous Server handling, allowing unresponsive clients’ files to be opened and locked by another client. Additionally, it receives some caching scalability improvements and some bug fixes for some data corruption bugs.

Other changes

On the multimedia side, the H.265/HEVC user space API is now declared “stable” and ready to utilize hardware decoders. PREEMPT_RT, real-time kernel support lands on kernel 6.0 too. Additionally, the developers are working on the random number generator for Linux, delivering some additional tweaks for bootloaders, hypervisors, and Kexec.

Some of the remaining noteworthy new features/fixes of Linux kernel 6.0 are listed below:

  • UEFI mirrored memory is now supported on AArch64 systems
  • Fixes and new memory management features in the DAMON framework subsystem
  • SafeSetID security module support to control setgroups() changes
  • ACPI PRM is now supported on AArch64 systems
  • New parameter to set a new hostname: “hostname=”
  • Run-time verification feature for safety-critical systems
  • Some networking optimizations
  • WiFi7 preparations

Download Linux kernel 6.0

Linux kernel 6.0 is now available for download for those who want to update their Linux-based systems with the newest hardware features. You can follow the link below to download the latest Linux kernel:

Click here to download Linux kernel 6.0

With the release of Linux kernel 6.0, the work for 6.1 has already begun. With the release announcement, Linus Torvalds, developer of the Linux kernel said;

Linus Torvalds, developer of Linux kernel
Linus Torvalds, developer of Linux kernel

« So, as is hopefully clear to everybody, the major version number change is more about me running out of fingers and toes than it is about any big fundamental changes.

But of course there’s a lot of various changes in 6.0 – we’ve got over 15k non-merge commits in there in total, after all, and as such 6.0 is one of the bigger releases at least in numbers of commits in a while.

The shortlog of changes below is only the last week since 6.0-rc7. A little bit of everything, although the diffstat is dominated by DRM (mostly AMD new chip support) and networking drivers.

And this obviously means that tomorrow I’ll open the merge window for 6.1. Which -unlike 6.0- has a number of fairly core new things lined up. But for now, please do give this most recent kernel version a whirl. »

FAQ

What is the most recent Linux kernel?

Currently, the most recent Linux kernel version is 6.1. The 6.2 version is expected to be released in the middle of February 2023.

How do you check the installed Linux kernel version?

You can check the Linux kernel version of your system with three different methods. You can simply use uname -r command to quickly check the Linux kernel version. You can also use cat /proc/version to check the version from a file. Installing the neofetch application is also an option to check the kernel version and it provides additional information about the other packages installed as well.

Can the Linux kernel be customized?

Yes, the Linux kernel can be customized. You can customize the Linux kernel by enabling or disabling specific options, and even adding new functionalities. But it’s a complicated process; you can check online guides about customizing the Linux kernel.

Is it legal to edit the Linux kernel?

Yes, it is legal to edit the Linux kernel since it is under General Public License.

Is the Linux kernel open source?

Yes, the Linux kernel is an open-source project.

Who developed the Linux kernel?

Linus Torvalds has developed and still developing the Linux kernel.

Does Linus Torvalds still work on Linux?

Yes, Linus Torvalds still works on developing the Linux kernel.

What is the Linux kernel written in?

Linux kernel code is written in the standard C programming language.

See more Linux News


Tags: Linux Kernel
Rusen Gobel

Rusen Gobel

Rusen Gobel is a news editor at Cloud7 News. With more than 10 years of experience, Rusen worked as a hardware and software news editor for technology sites such as Shiftdelete, Teknokolis, Hardware Plus, BT Haber. In addition, Rusen publishes consumer product reviews on his YouTube channel. While consumer electronics has been his main focus for years, now Rusen is more interested in WordPress and software development. He had contributed different web application projects in his professional career. Rusen had graduated from Istanbul University, department of Computer Engineering. Rusen has a very high passion for learning and writing for every kind of technology. That's why he has been working as a tech editor for more than ten years on several different technology magazines and online news portals.

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