Linux 7.0-rc4 Released With Hang Fixes, Resolves At Least One Performance Regression

Linux 7.0-rc4 Released: Rust Updates, Scheduler Fixes, and AMD GPU Power Fixes Arrive as Kernel 7.0 Nears Final Launch

In the ever-evolving world of open-source software, the Linux kernel continues to push boundaries, and the latest release candidate—Linux 7.0-rc4—is no exception. With just about a month left before the final stable release of Linux 7.0, the development community is buzzing with activity, and this fourth release candidate brings a mix of performance improvements, bug fixes, and forward-looking updates that set the stage for one of the most anticipated kernel versions in recent memory.

A Closer Look at Linux 7.0-rc4

Released today, Linux 7.0-rc4 is a significant milestone on the path to the final Linux 7.0 stable release, expected in mid-April. This release candidate introduces several key updates, including preparations for upcoming Rust language releases, critical fixes for scheduler hangs and performance regressions, and an AMDGPU fix aimed at resolving idle and power consumption issues on RDNA4 GPUs.

One of the standout features in this release is the preparation for upcoming Rust language releases. Rust, a systems programming language known for its memory safety and concurrency features, has been gradually integrated into the Linux kernel. These preparations in Linux 7.0-rc4 signal the kernel’s continued commitment to leveraging modern programming languages to enhance security and performance.

Another critical fix addresses hangs and a performance regression in the mm/cid scheduler code, which has been a thorn in the side of developers since Linux 6.19. The scheduler is a core component of the kernel, responsible for managing how processes are allocated CPU time. By resolving these issues, Linux 7.0-rc4 promises a smoother and more efficient experience for users, particularly those running workloads that heavily rely on scheduling.

For AMD GPU users, the AMDGPU fix for an idle/power consumption bug is a game-changer. This issue, which affected RDNA4 GPUs like those used in Llama.cpp and AI workloads, caused unnecessary power drain and performance hiccups. With this fix, users can expect better power efficiency and smoother performance, especially during compute-intensive tasks.

Additionally, the cpupower systemd service file now allows setting the EPP (Energy Performance Preference), giving users more granular control over their system’s power and performance balance. This update is particularly relevant for those who want to fine-tune their systems for specific use cases, whether it’s maximizing battery life on laptops or squeezing out every bit of performance on desktops.

Linus Torvalds Weighs In

As always, Linus Torvalds, the creator of Linux, has shared his thoughts on the release. In his 7.0-rc4 announcement, Torvalds noted that the week leading up to this release was anything but calm. What initially seemed like a quiet period quickly turned into a flurry of activity, with networking updates and other contributions pouring in toward the end of the week.

Torvalds humorously acknowledged that this pattern—where most contributions arrive late in the release cycle—is entirely normal. He also speculated that the psychological impact of the new major version number (7.0) might be driving increased activity among developers. While the release candidate is slightly larger than usual, Torvalds reassured the community that the changes are mostly small and benign, with selftest updates and kernel diffs showing a flat and spread-out distribution.

What’s Next for Linux 7.0?

With Linux 7.0-rc4 now available, the focus shifts to the final release, which is just around the corner. This version of the kernel is set to power major Linux distributions like Ubuntu 26.04 LTS and Fedora 44, among others, making it a cornerstone of the H1’2026 Linux ecosystem.

For those eager to dive deeper into the changes and features coming with Linux 7.0, Phoronix has published a comprehensive overview of the kernel’s updates. From performance enhancements to new hardware support, Linux 7.0 promises to deliver a robust and forward-looking foundation for both desktop and server environments.

Conclusion

Linux 7.0-rc4 is a testament to the relentless pace of innovation in the open-source community. With its focus on stability, performance, and modern language integration, this release candidate brings us one step closer to a kernel that is not only powerful but also future-proof. As the final release approaches, users and developers alike can look forward to a Linux experience that is faster, more efficient, and ready to tackle the challenges of tomorrow.

Whether you’re a seasoned Linux enthusiast or a newcomer to the world of open-source software, Linux 7.0 is shaping up to be a release that will leave a lasting impact. Stay tuned for more updates as we count down to the final launch!

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