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Tux Machines
Posted by Marius Nestor on Jun 25, 2023,
updated Jul 09, 2023
Highlights of Linux kernel 6.4 include Intel LAM (Liniar Address Masking) support, user trace events, the ability for the machine keyring used for Machine Owner Keys (MOK) to store only CA-enforced keys, LoongArch support for the nolibc library, support for zoned block devices for the F2FS file system, as well as support for the Svnapot extension and hibernation support for the RISC-V architecture.
The io_uring subsystem was improved to be able to perform multiple direct-I/O writes at the same time to a file (currently only supported on EXT4 and XFS filesystems), the SCTP (Stream Control Transmission Protocol) protocol gained support for the Fair and Weighted Fair Queuing (WFQ) schedulers, and a new netlink-based API was implemented to call out the user space for helper functions.
Read on
Update (by Roy)
LWN some time later:
> Headline features in this release include: generic iterators for BPF, the removal of the SELinux runtime disable knob, the removal of the SLOB memory allocator, linear address masking support on Intel CPUs, process-level samepage merging control, support for user trace events, more infrastructure for writing kernel modules in Rust, per-VMA locks, and much more. See the LWN merge-window summaries (part 1, part 2), and the (in-progress) KernelNewbies 6.4 page for the details.
> Hmm. Final week of 6.4 is done, and we've mainly got some netfilter
fixes, some mm reverts, and a few tracing updates.
There's random small changes elsewhere: the usual architecture noise,
a number of selftest updates, some filesystem fixes (btrfs, ksmb),
etc.
Most of the stuff in my mailbox the last week has been about upcoming
things for 6.5, and I already have 15 pull requests pending. I
appreciate all you proactive people.
But that's for tomorrow. Today we're all busy build-testing the newest
kernel release, and checking that it's all good. Right?
Linus
3 more:
> "Most of the stuff in my mailbox the last week has been about upcoming things for 6.5, and I already have 15 pull requests pending," he wrote, adding "I appreciate all you proactive people."
> The everlasting Linux Kernel has gotten yet another update, and this one includes some quality of life changes, a few upgrades to the file system of the OS, and additional support for Rust code in the kernel. In addition to this, the update also kept up with housekeeping by adding drivers for the latest hardware, such as Wi-Fi drivers for various Realtek modems.
> This release offers many improvements, such as initial Apple M2 silicon support, storage enhancements, better sensor monitoring, and more.
> Even though this is not a major upgrade for regular users, it caters to a specific group of users who want to take advantage of the better hardware/software support on offer.
CNX:
> Linux 6.4 has just been released by Linus Torvalds on the Linux Kernel Mailing List (LKML): Hmm.
OMG Joey:
> After 2 months of solid development, Linux 6.4 kernel is now officially available to download. Announcing the release of the latest Linux kernel on (where else?) the official Linux Kernel Mailing List (LKML), Linux founder Linus Torvalds writes [...]
It's FOSS:
> Another Linux Kernel release is here! This comes just months after the release of Linux Kernel 6.3, right on schedule.
> This release offers many improvements, such as initial Apple M2 silicon support, storage enhancements, better sensor monitoring, and more.
> Even though this is not a major upgrade for regular users, it caters to a specific group of users who want to take advantage of the better hardware/software support on offer.
Liam Dawe:
> Linus Torvalds has announced the release of the Linux kernel 6.4 and with it, lots and lots of new features and fixes.
Late coverage:
> Linus Torvalds announced the release of Linux Kernel 6.4 few days ago on Sunday. He wrote: Hmm.
From POWER camp:
> While we wait to see what Red Hat's new source code policy does to RHEL rebuilds like RockyLinux and Alma Linux downstream, Linux 6.4 came out this week. [...]
By Sean Michael Kerner:
> The recently released Linux 6.4 kernel is making some big networking strides that end users, enterprises and service providers will benefit from in the months to come.
> The Linux kernel offers essential capabilities for running operations that are widely used in networking equipment, enterprise, telco and the cloud. The kernel is part of a larger Linux operating system, with various vendors offering supported distributions including Red Hat, SUSE, and Canonical. Linux kernel development follows a rapid pace with new releases every six to ten weeks.
> Among the key networking features in Linux 6.4 are multiple improvements to improve traffic flow, extended support for Wi-Fi 7 wireless networking, new eBPF (extended Berkeley Packet Filter) features and IPv6 optimizations.
Bootlin's role:
> Linux 6.4 was released on June 25, just before the start of the Embedded Open Source Summit in Prague. As usual, lots of changes in Linux 6.4, and we recommend reading LWN coverage of the merge window (part 1, part 2).
Late from ZDNet:
> The latest version of the Linux kernel is ready for brave users to give it a try.
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