Linux 6.15-rc3 Lands with Minor Fixes and ublk Driver Updates
Linus Torvalds has officially released Linux 6.15-rc3, continuing the kernel’s development cycle with a steady stream of bug fixes and minor adjustments. As expected, the release arrived right after the weekend, coinciding this time with Easter Sunday—a detail Torvalds humorously acknowledged in his announcement.
“There’s absolutely nothing of huge note here as far as I can tell. Just a fair number of small fixes all over the place,” Torvalds wrote.
While major kernel releases sometimes bring dramatic features or sweeping performance changes, 6.15-rc3 focuses squarely on stability and refinement.
Spotlight: ublk Driver Enhancements
The most notable part of this release is the continued development of the ublk (user-space block) driver. Introduced in recent kernel versions, the ublk driver allows for flexible and efficient block storage support from user space, making it particularly useful for custom storage solutions and high-performance environments.
In Linux 6.15-rc3, several ublk-related improvements have been merged, including:
Fixes to the core ublk code
Updates to ublk selftests to improve robustness
Continued performance tuning and cleanup
These enhancements underline the kernel team’s commitment to maturing this still-young driver into a stable component of Linux’s storage stack.
Other Changes Across the Kernel
Beyond ublk, the remaining changes in 6.15-rc3 are relatively minor:
Small tweaks to a variety of subsystems
Patches involving just a few lines of code per change
Ongoing cleanups and bug resolutions from early testing of the 6.15 series
There are no major regressions or standout features in this release candidate—just the kind of quiet, steady refinement that keeps Linux running reliably on millions of devices.
What’s Next
As the kernel community moves forward with testing and fine-tuning, Linux 6.15 continues its march toward a stable release. If all goes smoothly, we can expect the final version to land in the coming weeks—delivering the latest iteration of the Linux kernel’s trusted performance and scalability.
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