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Linus Torvalds released Linux kernel 7.3 after the expected final development week. The release includes changes to scheduling, filesystems, BPF and virtual-machine tracking, and the 7.4 merge window is due to open next; Torvalds said his vacation will shift his schedule.
Linus Torvalds has released Linux kernel 7.3, completing the development cycle after a final week without an unexpected delay. The release brings changes across scheduling, filesystems, BPF and virtual-machine support, while the next development phase is due to begin with the Linux 7.4 merge window.
According to the release information reported by LWN.net, Linux 7.3 included 18,765 non-merge commits from 3,021 developers. Of those contributors, 807 were first-time kernel developers. Those figures describe the work incorporated into this release; they do not by themselves indicate how much faster or more reliable the kernel will be for particular users.
Among the changes listed are extensions to binfmt_misc, group-scheduling work intended to improve performance on large systems, and completion of the sched_ext subscheduler feature. The release also adds global per-CPU data for BPF programs and working-set tracking for virtual machines. Filesystem and storage-related work includes the new failfs filesystem, alternative data-stream support in ntfs3, and a range of improvements to the SMB server.
The report also identifies the fchroot() system call as part of the release. These items are a selection rather than a complete change list. LWN.net points readers to its merge-window summaries and the KernelNewbies Linux 7.3 page for further details about the development and individual changes.
What Changes in Linux 7.3
Linux 7.3 matters because it gathers a wide set of changes into a new kernel release used as a foundation by Linux distributions, device makers and other software projects. The listed work spans several areas rather than a single headline feature: scheduler behavior, filesystem support, BPF programming and virtual-machine tracking. The practical effect will depend on which features a system uses and how its distribution packages the kernel.
The contribution totals also show the scale of the release’s development activity, including hundreds of first-time contributors. They are a measure of participation and code integration, not a performance benchmark. The release notes provided here do not establish that every system will see a benefit, nor do they quantify the impact of the scheduler changes or other features.
For kernel developers, the release closes the 7.3 cycle and moves attention to new work for 7.4. For users, the immediate question is when a distribution or device vendor will provide the kernel, and whether its maintainers choose to adopt the new version. A kernel release does not mean that all Linux users receive it at once.
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From the 7.3 Cycle to 7.4
Linux kernel development proceeds through release cycles. After a final release, the next merge window opens, allowing maintainers to submit substantial changes for the following version. Torvalds said that the 7.4 merge window was expected to open the next day, following the 7.3 release.
That schedule comes with a qualification: Torvalds said he was beginning his annual family vacation and expected to spend part of the first day away from merging work. He said he would return to merging in the afternoon and that his schedule would be unusual for a while. The report describes this as a shift in his personal timetable, not a change to the release itself.
The source material identifies several notable Linux 7.3 changes but does not provide detailed technical explanations or test results for each one. Its references to LWN’s merge-window summaries and KernelNewbies’ version page are the available pointers for readers seeking a fuller account of what entered the kernel during the cycle.
“The final 7.3 is out, and thus tomorrow the merge window for 7.4 opens.”
— Linus Torvalds, as quoted in LWN.net
Linux 7.3 supported filesystem storage devices
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Rollout and Feature Effects
The supplied report does not specify when individual Linux distributions will package kernel 7.3, which devices will receive it, or whether any particular feature will be enabled by default. Those decisions are made by distribution and device maintainers, so the kernel release alone does not confirm availability to end users.
It also provides no quantified performance results for the group-scheduling work or other changes, and no detailed assessment of compatibility or adoption. The feature list establishes what the report says was included, but not how each change will affect a given workload. More detailed technical information is referenced in the LWN and KernelNewbies materials.
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The 7.4 Merge Window Begins
The next scheduled step is the Linux 7.4 merge window, which Torvalds said was due to open the day after the 7.3 release. His vacation was expected to make the start of that work follow a less usual timetable, with merging planned for later in the day rather than first thing in the morning.
Developers and maintainers will submit and review changes for the next kernel cycle. Separately, users waiting for Linux 7.3 will need to watch announcements from their own distribution or device vendor for packaging and rollout information. The source material does not give a release date for any specific distribution’s 7.3-based update.
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Key Questions
Who released Linux 7.3?
Linus Torvalds announced the final release of Linux kernel 7.3, as reported by LWN.net.
What are some of the main changes in Linux 7.3?
The reported changes include scheduler work, extensions to binfmt_misc, BPF per-CPU data, virtual-machine working-set tracking, ntfs3 alternative data streams, SMB server improvements, and the new failfs filesystem.
How many developers contributed to Linux 7.3?
The release included 18,765 non-merge commits from 3,021 developers, including 807 first-time kernel developers, according to the figures cited by LWN.net.
When will Linux 7.3 reach my computer?
The release announcement does not give rollout dates for distributions or devices. Availability depends on the distribution or vendor that packages and supports the kernel.
What happens after Linux 7.3?
The Linux 7.4 merge window was expected to open the day after the 7.3 release, beginning the next stage of kernel development.
Source: hn
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