What’s New in Linux Kernel 6.0? Key Features and Improvements Explained

Linus Torvalds announced the stable release of Linux kernel 6.0 on October 2, describing it as a major version with a large number of commits.

Torvalds wrote that the version‑number change reflects his personal fatigue rather than any fundamental overhaul.

Key improvements in Linux 6.0 include:

Official support for the Rust programming language, with many Rust‑related pull requests merged.

Optional disabling of certain ARM chip features to mitigate speculative‑execution issues.

Retbleed mitigation with minimal performance impact.

New CPU fault detection capabilities, valuable for large‑scale Linux deployments such as cloud providers.

Enhanced ACPI handling and power‑management optimizations that can reduce energy consumption on Intel Sapphire Rapids CPUs.

Improved kernel support for SMB3, accelerating file‑transfer speeds and encouraging the deprecation of insecure SMB1.

Significant progress in RISC‑V support, helping reduce reliance on imported technologies.

Certification of Intel’s discrete Arc graphics cards and better support for some ARM‑based laptops.

Optimizations for Atari PC hardware, including better VGA signal handling.

These changes make Linux 6.0 one of the most substantial releases in terms of both feature additions and commit volume.