Linux Kernel 6.4 officially released, the latest and greatest kernel series

Linus Torvalds today released Linux 6.4, a major update to the latest and greatest kernel series for the Linux operating system, bringing better hardware support and new features.

Highlights of Linux Kernel 6.4 include Intel LAM (Linear Address Masking) support, user tracking events, Machine Owner Key (MOK) for storing CA-enforced machine keyrings only, LoongArch support for the nolibc library , partitioned device support for the F2FS file system, and hibernation support for Svnapot extensions and RISC-V architecture.

io_uring subsystem improvements to be able to perform multiple direct I/O writes to files simultaneously (currently only supported on EXT4 and XFS file systems), SCTP (Stream Control Transfer Protocol) protocol adds support for fair weight queues ( WFQ) scheduler support, and implements a netlink-based API to call user space auxiliary functions.

Related: Install the latest Linux Kernel 6.2 on Ubuntu Linux https://www.linuxmi.com/ubuntu-22-04-linux-kernel-6-2.html

s390 (IBM System z) architecture supports the STACKLEAK security feature, the NFS server implementation now supports the RFC 9289 specification, and the perf tool has made many changes, including a new reference counting checking infrastructure, updating the default map size to 16384, and updating the default map size to 16384 in the future. Python support in the 'perf script' when linking with the libtraceevent library, better reporting of lock contention, and the ability to use BPF to filter samples.

There are also some new additions to Rust language support, including an "ARef" type for wrapping C types with their own reference counting functions, several new lock primitives, pin- init API core, "LockedBy" for protecting data via locks, UAPI crate for image creation, and other functions and bindings.

In addition, Linux kernel 6.4 also adds support for some features, including the new Qualcomm QAIC DRM acceleration driver for Cloud AI; KVM support for virtual non-maskable interrupts (NMI) on x86 AMD platforms ; fbdev emulation for GEM DMA driver; Qualcomm Inline Crypto Engine support; support for new MMIO-based model (T2 Macs); Intel Sierra Forest EDAC support; better BIG TCP performance; and new BPF netfilter program type.

Linux kernel 6.4 also makes various thermal management improvements in the Mediatek driver, enhances support for very old PCI sound cards, provides sound support for NVIDIA systems with MAX9809x and RT5631 codecs, and provides sound support for all Kye models The graphics tablet provides universal support for the Logitech G935 wireless 7.1 surround sound gaming headset, as well as PPIN support for Intel's fifth-generation Xeon "Emerald Rapids" server processors.

Linux 6.4 also adds new drivers for the StarFive JH71x0 temperature sensor and StarFive JH7110 RISC-V SoC, the Acbel FSB032 power supply, the Aquacomputer Aquastream XT water pump, and the ROG STRIX Z390-F GAMING motherboard.

In addition, the latest Xbox controller gains vibration support, also adds support for Apple M2 CPU PMU, Wi-Fi 7 (EHT) mesh support, improved support for Qualcomm Snapdragon platform, and the addition of Novatek touch Drivers for controllers, support for Lenovo Yoga Book X90F 2-in-1 tablet, Hyper-V VTL mode support, and Wi-Fi support for Apple M1 Pro/Max devices.

AMDGPU graphics driver gets preliminary NBIO7.9, GC 9.4.3, GFXHUB 1.2, MMHUB 1.8 support, preliminary DC FAM infrastructure, sysfs nodes for secondary VCN clocks, and support for supported APUs Limited/unlimited workload handling. Additionally, the Mediatek DRM driver gained 10-bit overlay support, the Rockchip DRM driver gained 4K support, and Collabora's Panfrost driver now supports Mali MT81xx devices.

Linux kernel 6.4 can be downloaded from Linus Torvalds' git repository or from the kernel.org website if you know how to compile it on a GNU/Linux distribution. Otherwise, you'll have to wait for Linux kernel 6.4 to land in your distribution's stable repositories.

Related: Linus Torvalds announces the release of Linux Kernel 6.4 RC1 https://www.linuxmi.com/linux-kernel-6-4-rc1.html

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