In brief
- LWN reports that Linus Torvalds has released the Linux 7.3 kernel.
- For distros, cloud operators and driver maintainers, this is a record-sized cycle on LWN’s count — 18,765 non-merge commits from 3,021 developers — and the 7.4 merge window is now open.
- What’s still unknown for most users: when each distribution will ship 7.3 packages, and which of the headline features land in their default configs.
If you track kernel cadence for production fleets, the practical takeaway is timing: 7.3 is tagged, and new work for 7.4 is already eligible to merge.
What did Torvalds say?
LWN (posted 18 October 2026) quotes Torvalds’s Sunday-afternoon announcement:
Anyway, nothing very special seems to have happened this last week, so as expected the final 7.3 is out, and thus tomorrow the merge window for 7.4 opens.
He also noted he was on annual family vacation and expected an “unusual” merging schedule for a while — colour from the same announcement, not a change to the release status.
How big was 7.3?
Credit these counts to LWN, not to Torvalds’s mail:
| Metric (LWN) | Figure |
|---|---|
| Non-merge commits | 18,765 |
| Developers | 3,021 |
| First-time kernel developers | 807 |
LWN calls the release “a record-breaker on all fronts.”
What are the key changes?
Significant changes listed by LWN include:
| Area | Change (per LWN) |
|---|---|
| Binary formats | Significant binfmt_misc extensions |
| Scheduling | Group-scheduling work for large systems |
| Filesystems | New failfs filesystem that fails all operations |
| System calls | fchroot() |
| BPF | Global per-CPU data for BPF programs |
| Scheduling (ext) | Completion of the sched_ext subscheduler feature |
| Virtualisation | Working-set tracking for virtual machines |
| ntfs3 | Alternative data-stream support |
| SMB | A long list of SMB server improvements |
LWN points readers to its merge-window summaries and the KernelNewbies 7.3 page for fuller detail. TSN is not expanding beyond LWN’s listed headlines.
Is the 7.4 merge window open?
Yes, on Torvalds’s wording as quoted by LWN: with 7.3 final, “tomorrow the merge window for 7.4 opens.” Relative to the Sunday announcement, that is the next day’s open window — treat 7.4’s merge window as open now.
Who should care first?
- Distro and cloud kernel teams planning package bumps
- Driver and filesystem maintainers watching ntfs3, SMB and sched_ext
- BPF and scheduler developers following per-CPU data and group-scheduling work
Our read
A record commit count matters less to end users than whether 7.3’s headline features are enabled in the kernels they actually run. The clearer operational signal is process: 7.3 is closed, 7.4 is open, and vacation-skewed merge timing may bunch early 7.4 pulls into a shorter effective window.
What’s still unknown?
- Distro ship dates for 7.3
- Which listed features are on by default in major vendor kernels
- How compressed Torvalds’s early 7.4 merges will be during his vacation
How we sourced this
- Primary account: LWN, “The 7.3 kernel has been released,” 18 October 2026, quoting Linus Torvalds’s announcement.
- Commit and developer totals (18,765 / 3,021 / 807) are LWN’s counts.
- Feature list summarised from the same LWN article; deeper detail left to LWN’s merge-window summaries and KernelNewbies as LWN cites them.
Sources
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