Linus Torvalds has officially released Linux kernel 6.15, delivering major updates across hardware support, storage performance, virtualization, and system tooling.
🔧 Expanded Hardware Support
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Better compatibility with AMD and Intel devices
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Improvements for HP ZBook laptops
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Ongoing enhancements for ARM and RISC-V platforms
💾 Storage Upgrades
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Bcachefs continues maturing with more robust support
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Btrfs gains real-time Zstandard compression, boosting performance under varied workloads
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Faster file deletion on exFAT systems
🛡️ Rust in the Kernel
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Rust language integration grows, with new support for hrtimer and ARMv7 components in kernel space—marking continued progress in safe systems programming.
💻 Virtualization & Architecture
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New
setcpuid=boot parameter for x86 admins -
Support for VGICv3 in nested ARM virtualization
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Apple Silicon now emulates FEAT_PMUv3, improving compatibility
📶 Networking Improvements
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New TCP socket option
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Zero-copy receive with io_uring for faster network I/O
🧠 Scheduler Diagnostics
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sched_extcan now count and report internal events, aiding developers with better introspection and profiling tools
📂 Filesystem and FUSE Enhancements
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FUSE enforces timeouts on stalled user-space servers and allows longer file names
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Overall responsiveness and reliability improved for users relying on custom file systems