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Linus Torvalds released the Linux 7.3 kernel after a routine final development week. LWN reports 18,765 non-merge commits from 3,021 developers, alongside changes to scheduling, filesystems, BPF and virtual-machine tracking; the Linux 7.4 merge window is due to open next.
Linus Torvalds released Linux 7.3 on Sunday, completing the kernel development cycle and clearing the way for the Linux 7.4 merge window to open the next day. The release includes changes across scheduling, filesystems, BPF and virtualization, with LWN.net reporting 18,765 non-merge commits contributed by 3,021 developers.
Torvalds described the final week as uneventful and said the release came out as expected, without a last-minute delay. In his release note, he said he had kept track of the day of the week and joked that the release was not “randomly delayed.” The next development stage is the merge window, when developers submit and integrate changes proposed for the following kernel release.
LWN’s report counts 3,021 developers contributing to Linux 7.3, including 807 first-time kernel developers. It records 18,765 non-merge commits; that figure excludes merge commits and describes this release’s contribution count, rather than a measure of performance or user adoption. The report calls the release a record-breaker, but the supplied figures do not specify a comparison baseline for each category.
Among the changes listed are extensions to binfmt_misc, group-scheduling work aimed at performance on large systems, and completion of the sched_ext subscheduler feature. The release also adds the fchroot() system call, global per-CPU data for BPF programs, virtual-machine working-set tracking, alternative data streams in the ntfs3 filesystem, and numerous SMB server improvements. A new filesystem called failfs is designed to fail all operations, according to the release summary.
Changes Across Kernel Subsystems
Linux 7.3 matters because the kernel is shared infrastructure for a wide range of systems, from servers and desktops to virtual machines and embedded devices. Its changes touch several areas that maintainers and users may follow: scheduling on large machines, filesystem behavior, virtual-machine memory tracking and BPF program capabilities. The release summary identifies these as technical changes, but does not provide benchmark results or establish how much they will affect workloads in practice.
The reported contributor count also offers a snapshot of participation in this release cycle. The 807 first-time contributors are part of the broader total, not an additional group to be added to it. Their presence indicates new participation in this cycle, though the figures alone do not explain what work those contributors performed or whether they will continue contributing.
For people who install or maintain Linux systems, release of a kernel version does not automatically mean it is available through every distribution or suitable for every machine. Distributions decide when to package kernel versions, and administrators typically weigh hardware support, testing and maintenance needs before changing a production system. The listed features may be relevant to particular environments, but the source material does not recommend an immediate upgrade.
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From Final Release to 7.4
A kernel release follows a development cycle in which proposed changes are gathered and tested before a final version is published. Once Linux 7.3 was released, attention shifted to the next merge window, the period when changes for Linux 7.4 are expected to be submitted and integrated. Opening that window marks the start of the next development stage; it does not mean Linux 7.4 is complete or ready for general use.
Torvalds said he was beginning an annual family vacation and expected his schedule to be unusual for a while. He said he planned to spend much of the next day on a boat and underwater, then return to merging work in the afternoon. LWN also pointed readers to its summaries of the merge window and to the KernelNewbies Linux 7.3 page for further detail on the release’s changes.
““Nothing very special seems to have happened this last week, so as expected the final 7.3 is out.””
— Linus Torvalds, in the release note quoted by LWN.net
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Performance Effects Still Unmeasured
The source material lists the principal changes but does not provide technical specifications for each feature, testing results, or workload benchmarks. It is therefore unclear how much the scheduling work will improve performance on large systems, or what measurable effects the other changes will have in particular deployments. The stated aim of the scheduling work should not be read as proof of a specific performance gain.
The report describes the release as a record-breaker, but the supplied information does not identify the exact historical comparisons behind that characterization. It also does not say when individual Linux distributions will package 7.3, which systems will receive it first, or whether particular fixes address issues that affect a given user. Those details depend on further release documentation and distribution decisions.
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Linux 7.4 Development Begins
According to Torvalds, the Linux 7.4 merge window was expected to open on the Monday after the 7.3 release. He anticipated an unusual schedule at the start because of his family vacation, with merging work resuming later in the day. The next step is for developers to submit and integrate proposed changes; the release note does not give a Linux 7.4 publication date.
For Linux 7.3, the next practical developments are likely to come through detailed technical documentation, testing and distribution packaging. Users and administrators can check their distribution’s release information before deciding whether to install it. The available source does not state a rollout schedule or provide upgrade guidance for specific systems.
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Key Questions
What happened with Linux 7.3?
Linus Torvalds released Linux 7.3 on Sunday, concluding its development cycle. The release includes changes in scheduling, filesystems, BPF and virtual-machine tracking.
How many developers contributed to Linux 7.3?
LWN.net reports 3,021 developers contributed 18,765 non-merge commits. Of those developers, 807 were first-time kernel contributors; the commit figure excludes merge commits.
What are some of the main changes in Linux 7.3?
The listed changes include group-scheduling work for large systems, completion of sched_ext, the fchroot() system call, BPF per-CPU data, virtual-machine working-set tracking, ntfs3 alternative data streams and SMB server improvements.
Does Linux 7.3 mean Linux 7.4 is released?
No. Linux 7.3 is released; the 7.4 merge window is the next development stage, when proposed changes for that future version are expected to be gathered and integrated.
When can users install Linux 7.3?
The release is out, but the source material does not give a distribution-by-distribution packaging schedule. Availability will depend on each Linux distribution’s release process.
Source: hn
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