Linux 6.17-rc1 It is now available And it arrived a few hours earlier than usual because Linus Torvalds is in Europe, which concludes the integration window for this cycle. This first stable release candidate marks the start of the testing phase and aims to power distributions by the end of the year, such as Ubuntu 25.10 and other releases planned for 2025.
It has been an intense cycle with Relevant changes to graphics, input, file systems, firmware, and toolsAmong the headlines: Intel Xe3 graphics for Panther Lake now enabled by default, the performance boost key is standardized on laptops, F2FS adopts the new mount API, EFI and Turbostat improvements are coming, and Rust core additions continue.
Main new features of the cycle started by Linux 6.17-rc1
Graphics and platforms
On the graphic front, Intel Xe3 for Panther Lake is enabled by default, while for future Intel Battlemage GPUs, SR-IOV is incorporated and progress is being made in multi-GPU preparation within the so-called Project Battlematrix. In addition, new ARM and RISC-V SoCs, expanding emerging hardware support for future generations.
Entry and configuration
The input subsystem standardizes the KEY_PERFORMANCE key code for the increasingly common “performance boost” key found on certain laptops (including some Alienware and Dell laptops with G-Mode), which will make it easier for the user space to apply a high-performance profile evenly. It will also default mapping to keys F13 to F24 on PS/2 keyboards and the gconfig kernel configuration editor is updated to use GTK3.
File systems
F2FS arrives with a round of improvements: conversion to folios, adoption of the new mounting API kernel, new nodes in sysfs to control F2FS GCs under ZUFS, optimizations of the NAT entry cache, removing inodes from the donation list when the last file is closed, and avoiding splitting bios when reading multiple pages. In addition, general performance improvements on multiple file systems.
Firmware and boot
In EFI a driver is added for the OVMF debug log, exposing the virtual machine firmware log buffer via sysfs in the path /sys/firmware/efi/ovmf_debug_log, which is very useful for diagnosing QEMU and KVM boots. In addition, the code of the efistub reduces the default log level to prevent informational messages from covering or corrupting the splash screen.
Tools and performance
Turbostat incorporates notable functions: shows the topology of the L3 cacheAllows average counters added (e.g. cumulative watts) and improves compatibility with upcoming Intel Xeon Diamond Rapids following changes to certain MSRs. Musl builds are also corrected and various fixes are included. In terms of security, the new mechanism Attack Vector Controls simplifies management of CPU mitigations.
Rust and other changes
The kernel continues to expand the use of Peace with new pieces that reinforce the foundation for drivers and components written in this language, consolidating the work of previous cycles.
What's missing in Linux 6.17-rc1
The RISC-V changeset has not been included in this release.Torvalds requested early submissions due to his trip and rejected the pull for being late and for including changes to generic headers that he considered inappropriate. The architecture will have to retry its integration early in the 6.18 release window, with the scope adjusted.
Respecto a Bcachefs, no updates have been incorporated from Linux 6.16-rc4 Torvalds hasn't commented on the matter in the Linux 6.17-rc1 public message. There was speculation in the past few days about giving users time to migrate before a possible retirement in 6.18, but for now the code remains unchanged and there's no definitive position. Its lead developer noted that the system has stabilized quickly, with favorable automated bug metrics, and defended its continuation; the final decision remains with project management.
Linux 6.17-rc1 Availability and Schedule
The label of Linux 6.17-rc1 It's already in Git and the community can start testing it. If the pace of corrections allows it, the stable release would arrive around late September or early OctoberIf additional candidates emerge, the schedule could shift slightly. Further analysis and performance testing of the 6.17 code is expected in the coming days.
This cycle is characterized by changes that underpin Next-gen hardware, more consistent input, cleaner boot, hardened F2FS, and fine-tuned tools. In addition, controversial packages like RISC-V are being postponed, and the future of Bcachefs is being held up. Those who want to get a head start can test Linux 6.17-rc1 on their development machines.
